Articles | Volume 11, issue 2
https://doi.org/10.5194/ms-11-381-2020
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/ms-11-381-2020
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Research article
| 
27 Oct 2020
Research article |
| 27 Oct 2020
| 27 Oct 2020
Singularity and branch identification of a 2 degree-of-freedom (DOF) seven-bar spherical parallel manipulator
Liangyi Nie
School of Mechanical Engineering and Electronic Information, China
University of Geosciences, Wuhan, 430074, China
Hubei Key Laboratory of Advanced Control and Intelligent Automation for
Complex Systems, Wuhan, 430074, China
Faculty of Engineering Sciences Institute of Mechatronics and System
Dynamics, University of Duisburg-Essen, 47057 Duisburg, Germany
Huafeng Ding
CORRESPONDING AUTHOR
School of Mechanical Engineering and Electronic Information, China
University of Geosciences, Wuhan, 430074, China
Andrés Kecskeméthy
Faculty of Engineering Sciences Institute of Mechatronics and System
Dynamics, University of Duisburg-Essen, 47057 Duisburg, Germany
Jinqiang Gan
School of Mechanical Engineering and Electronic Information, China
University of Geosciences, Wuhan, 430074, China
Jun Wang
Center for Robotics Research, School of Mechanical Engineering, Hubei
University of Technology, Wuhan, 430068, China
Kwun-lon Ting
Center for Manufacturing Research, Tennessee Technological University, TN
38505, USA
Related authors
No articles found.
Liangyi Nie, Huafeng Ding, Andrés Kecskeméthy, Kwun-Lon Ting, Shiming Li, Bowen Dong, Zhengpeng Wu, Wenyan Luo, and Xiaoyan Wu
Mech. Sci., 15, 331–351, https://doi.org/10.5194/ms-15-331-2024, https://doi.org/10.5194/ms-15-331-2024, 2024
Short summary
Short summary
Using loop equations and branch graphs, we propose a method to construct single-degree-of-freedom (single-DOF) multi-mode-planar mechanisms (MMPMs), replacing links or components of the singular configuration of planar mechanisms with multi-mode modules. The method is straightforward, visible, and widely applicable to single-DOF MMPMs. We give new design direction and powerful design guidance for the design of MMPMs, along with the available configuration and more choice for the application.
Florian Simroth, Huafeng Ding, and Andrés Kecskeméthy
Mech. Sci., 7, 107–117, https://doi.org/10.5194/ms-7-107-2016, https://doi.org/10.5194/ms-7-107-2016, 2016
Short summary
Short summary
The "double-banana" problem is a counter-example of Laman's rigidity condition formula for which existing standard Degree of Freedom counting formulas fail. The novelty of the approach for rigidity detection presented in this paper consists in regarding the structure not as a set of joint-connected bodies but as a set of interconnected loops. By tracking isolated DOFs such as those arising between pairs of spherical joints, rigidity/mobility subspaces can be identified successfully.
Related subject area
Subject: Mechanisms and Robotics | Techniques and Approaches: Mathematical Modeling and Analysis
A replaceable-component method to construct single-degree-of-freedom multi-mode planar mechanisms with up to eight links
Optimal design and experiments of a novel bobbin thread-hooking mechanism with RRSC (revolute–revolute–spherical–cylindrical) spatial four-bar linkage
Dynamic modeling and performance analysis of the 2PRU-PUU parallel mechanism
Development of a flexible endoscopic robot with autonomous tracking control ability using machine vision and deep learning
Modeling and control system experiment of a novel series three-axis stable platform
Design and obstacle-crossing analysis of a four-link rocker-suspension planetary exploration robot
A convolutional neural-network-based diagnostic framework for industrial bearing
Design and analysis of a dual-rope crawler rope-climbing robot
Type synthesis of non-overconstrained and overconstrained two rotation and three translation (2R3T) parallel mechanisms with three branched chains
Motion planning and control strategy of a cable-driven body weight support gait training robot
Optimal resource allocation method and fault-tolerant control for redundant robots
Ellipsoid contact analysis and application in the surface conjugate theory of face gears
Adaptive chaos control of a humanoid robot arm: a fault-tolerant scheme
Kinematic and dynamic characteristics' analysis of a scissor multi-rod ring deployable mechanism
Design of a soft bionic elbow exoskeleton based on shape memory alloy spring actuators
Dimensional synthesis of a spherical linkage crank slider mechanism for motion generation using an optimization algorithm
A versatile end effector for grabbing and spreading of flaky deformable object manipulation
Design and kinematics of a lightweight cruciform continuum robot
Modeling and control strategy of a haptic interactive robot based on a cable-driven parallel mechanism
Research on obstacle performance and tipping stability of a novel wheel–leg deformation mechanism
Dynamic modeling and vibration characteristics analysis of parallel antenna
A real-time and accurate detection approach for bucket teeth falling off based on improved YOLOX
Research on structural parameters and kinematic properties of a drill-in granary grain condition detector
Surface modification and tooth contact analysis of variable hyperbolic circular-arc-tooth-trace cylindrical gears
Analysis of the coaxiality–geometric hysteresis model of a rotate vector reducer based on Ansys Adams
Dynamic modeling and experiment of hind leg swimming of beaver-like underwater robot
Spring efficiency assessment and efficient use of spring methods of statically balanced planar serial manipulators with revolute joints only
Structural optimization of a pipe-climbing robot based on ANSYS
Design and analysis of a hollow-ring permanent magnet brake for robot joints
A novel compound topological invariant for isomorphism detection of planar kinematic chains
Varying rate adaptive hybrid position–impedance control for robot-assisted ultrasonic examination system
Design and kinematic analysis of a multifold rib modular deployable antenna mechanism
Design of a transrectal ultrasonic guided prostate low dose rate brachytherapy robot
A passive upper-limb exoskeleton for industrial application based on pneumatic artificial muscles
Innovative design method for planar mechanism configuration based on component similarity discrimination
Design and test of a positioning system for a greenhouse electric micro-tiller based on ultra-wideband
A novel flying–walking power line inspection robot and stability analysis hanging on the line under wind loads
Kinematic and dynamic analysis of an omnidirectional mobile platform driven by a spherical wheel
Kinematic and dynamic accuracy of spherical mechanisms
Design and analysis of a six-wheeled companion robot with mechanical obstacle-overcoming adaptivity
Precise mathematical model for the ratchet tooth root bending stress
Swing control for a three-link brachiation robot based on sliding-mode control on irregularly distributed bars
Analysis and compensation control of passive rotation on a 6-DOF electrically driven Stewart platform
Force analysis of minimal self-adaptive fingers using variations of four-bar linkages
Kinematics decoupling analysis of a hyper-redundant manipulator driven by cables
Research on a cascade model synthesis with the use of classical and non-classical methods in the context of new piezoelectric stack applications
A toy-inspired kirigami pattern and its kinematic performance by applying mechanisms and machine theory
Analytical solution to contact characteristics for a variable hyperbolic circular-arc-tooth-trace cylindrical gear
The approximate calculation of the natural frequencies of a Stockbridge type vibration damper and analysis of natural frequencies' sensitivity to the structural parameters
Dynamic modeling and vibration analysis of a cracked 3K-II planetary gear set for fault detection
Liangyi Nie, Huafeng Ding, Andrés Kecskeméthy, Kwun-Lon Ting, Shiming Li, Bowen Dong, Zhengpeng Wu, Wenyan Luo, and Xiaoyan Wu
Mech. Sci., 15, 331–351, https://doi.org/10.5194/ms-15-331-2024, https://doi.org/10.5194/ms-15-331-2024, 2024
Short summary
Short summary
Using loop equations and branch graphs, we propose a method to construct single-degree-of-freedom (single-DOF) multi-mode-planar mechanisms (MMPMs), replacing links or components of the singular configuration of planar mechanisms with multi-mode modules. The method is straightforward, visible, and widely applicable to single-DOF MMPMs. We give new design direction and powerful design guidance for the design of MMPMs, along with the available configuration and more choice for the application.
Bingliang Ye, Xu Wang, Mingfeng Zheng, Pengbo Ye, and Weiwei Hong
Mech. Sci., 15, 269–279, https://doi.org/10.5194/ms-15-269-2024, https://doi.org/10.5194/ms-15-269-2024, 2024
Short summary
Short summary
In order to solve the problem that an embroidery machine generally uses a straight needle and rotary shuttle to form a lock stitch, which results in the low supply of bobbin thread and frequent bobbin changes, a bobbin thread-hooking mechanism with spatial four-bar linkage is proposed which can achieve a continuous supply of bobbin thread. We provide a reference for solving this embroidery machine practical problem with a spatial four-bar mechanism optimal design method.
Tianze Sun, Wei Ye, Chao Yang, and Fengli Huang
Mech. Sci., 15, 249–256, https://doi.org/10.5194/ms-15-249-2024, https://doi.org/10.5194/ms-15-249-2024, 2024
Short summary
Short summary
The main contribution of this paper is to establish the dynamic model of the reconfigurable parallel mechanism, a versatile robotic system capable of adapting its configuration to different tasks. The dynamic model facilitates the analysis of the dynamic performance of the mechanism. This comprehensive dynamic model serves as a valuable tool for control algorithm development and the performance optimization of reconfigurable parallel mechanisms in diverse applications.
Sen Qian, Jianxi Zhang, Zongkun Pei, Xiantao Sun, and Zhe Wu
Mech. Sci., 15, 223–236, https://doi.org/10.5194/ms-15-223-2024, https://doi.org/10.5194/ms-15-223-2024, 2024
Short summary
Short summary
A flexible endoscopic robot is designed to solve the problem that it is difficult to maintain a stable visual field in traditional endoscopic surgery. The main contribution of this research is to realize the motion planning and primary–secondary teleoperation control of the flexible endoscope robot under remote center motion constraints on the basis of its structure and select the appropriate deep learning algorithm to complete the autonomous tracking function.
Da Song, Xinlei Xiao, Ji Ma, and Lixun Zhang
Mech. Sci., 15, 209–221, https://doi.org/10.5194/ms-15-209-2024, https://doi.org/10.5194/ms-15-209-2024, 2024
Short summary
Short summary
In this paper, a novel series three-axis stable platform (STSP) is proposed, and its azimuth angle structure, pitch angle structure, roll angle structure, system control scheme, and control strategy are designed. The main function of this stable platform is to isolate the influence of installation carrier movement or external interference and to provide a stable working environment for equipment installed on the stable platform by establishing a stable reference plane.
Zhen Song, Zirong Luo, and Huixiang Xie
Mech. Sci., 15, 137–157, https://doi.org/10.5194/ms-15-137-2024, https://doi.org/10.5194/ms-15-137-2024, 2024
Short summary
Short summary
There are still many meteorite craters and boulders on the surface of Mars and the Moon that cannot be accessed by existing planetary exploration robots. To solve this issue, this paper proposes a four-link rocker-suspension planetary exploration robot that has both the reliability and low complexity of wheeled rovers and competent terrain adaptability and obstacle-crossing performance.
Bowen Yu and Chunli Xie
Mech. Sci., 15, 87–98, https://doi.org/10.5194/ms-15-87-2024, https://doi.org/10.5194/ms-15-87-2024, 2024
Short summary
Short summary
In this study, we introduce an innovative diagnostic framework tailored to industrial bearings that facilitates automated feature extraction and enables end-to-end fault detection. Our validation across multiple bearing vibration datasets confirms the framework's superiority in handling complex and non-stationary signals in industrial environments.
Jinhang Wang, Lairong Yin, Ronghua Du, Long Huang, and Juan Huang
Mech. Sci., 15, 31–45, https://doi.org/10.5194/ms-15-31-2024, https://doi.org/10.5194/ms-15-31-2024, 2024
Short summary
Short summary
A rope-climbing robot (RCR) can reciprocate on a rope. To address poor load capacity and adaptability, this study designs a dual-rope crawler type RCR for use as a new type of transportation equipment in hilly, mountainous, and plateau areas. The crawler rope-climbing mechanism is a combination of a chain drive and the rope-climbing foot. With overhead rope parabolic theory to kinematically analyze the RCR system, the robot motion trajectory model and tilt angle equation are established.
Yu Rong, Xingchao Zhang, Tianci Dou, and Hongbo Wang
Mech. Sci., 14, 567–577, https://doi.org/10.5194/ms-14-567-2023, https://doi.org/10.5194/ms-14-567-2023, 2023
Short summary
Short summary
This paper presents a new method to design a new mechanism with fewer moving joints and greater bearing capacity. These machinery-manufacturing, parts-processing, and other fields have a wide range of application prospects.
Tao Qin, Qianpeng Wang, Wei Su, Chao Wei, Yanduo Zhang, and Jianwei Zhang
Mech. Sci., 14, 413–427, https://doi.org/10.5194/ms-14-413-2023, https://doi.org/10.5194/ms-14-413-2023, 2023
Short summary
Short summary
A cable-driven body weight support gait training robot (C-BWSGTR) was designed to help provide patients with partial body weight support and a stable walking driving force to assist gait rehabilitation training. Overall configuration, kinematic modeling, and motion planning were carried out, and a position servo composite control strategy was designed. Simulation analysis and the prototype experiment verified that the designed control strategy met the requirements of the system.
Yu Rong, Tianci Dou, and Xingchao Zhang
Mech. Sci., 14, 399–412, https://doi.org/10.5194/ms-14-399-2023, https://doi.org/10.5194/ms-14-399-2023, 2023
Short summary
Short summary
Resource coordination and allocation strategies are proposed to reduce the probability of failure by aiming at the problem that the robot cannot continue to work after joint failure. Taking the planar 4R redundant robot as an example, the algorithm control is compared. Based on reasonable modeling and physical verification, the results show that the method of optimal resource coordination and allocation is effective.
Xiaomeng Chu, Yali Liu, and Hong Zeng
Mech. Sci., 14, 305–314, https://doi.org/10.5194/ms-14-305-2023, https://doi.org/10.5194/ms-14-305-2023, 2023
Short summary
Short summary
In the design and processing of face gears, it is not necessary to accurately express the tooth surface with an equation, since it will be difficult to analyze some of the most important and practical features, such as the induced curvature relationship. In this regard, this paper uses the discrete curvature relationship of a spatial gradient curvature ellipsoid to describe the space meshing surface, and it establishes a set of discrete digital conjugate surface meshing principles.
Said Ghani Khan
Mech. Sci., 14, 209–222, https://doi.org/10.5194/ms-14-209-2023, https://doi.org/10.5194/ms-14-209-2023, 2023
Short summary
Short summary
Humanoid robots are stepping into the social environment. However, smooth and safe operation is still a challenge. Faults in robotics, whether mechanical or electrical, are still inevitable. In this work, we present a fault-tolerant scheme for a humanoid robotic arm, to minimize the damage if a joint fails during normal operation or during human–robot interaction or cooperation.
Bo Han, Yuxian Yao, Yuanzhi Zhou, Yundou Xu, Jiantao Yao, and Yongsheng Zhao
Mech. Sci., 14, 193–207, https://doi.org/10.5194/ms-14-193-2023, https://doi.org/10.5194/ms-14-193-2023, 2023
Short summary
Short summary
A double-layer ring truss deployable antenna mechanism is proposed, which is connected by a scissor-like structure. The degrees of freedom, six-dimensional velocity, and acceleration are calculated using spiral theory, and the dynamic model is established. Simulation software is used to verify the simulation, and the prototype is made at a reduced scale. Because the satellite antenna is very important, we decided to study the supporting frame.
Qiaolian Xie, Qiaoling Meng, Wenwei Yu, Rongna Xu, Zhiyu Wu, Xiaoming Wang, and Hongliu Yu
Mech. Sci., 14, 159–170, https://doi.org/10.5194/ms-14-159-2023, https://doi.org/10.5194/ms-14-159-2023, 2023
Short summary
Short summary
This paper presents a novel soft bionic elbow exoskeleton based on shape metal alloy (SMA) actuators (Sobee-SMA). The exoskeleton adopts a bionic design, combining active deformation material SMA and high elastic material rubber band to simulate the contraction and relaxation of the elbow skeletal muscle. According to the static analysis of the human–exoskeleton coupling model and experiments, the exoskeleton provides elbow-assisted motion and ensures the safety of the thermal heating process.
Wei Zhang, Zhen Liu, Wenrui Liu, Jianwei Sun, and He Lu
Mech. Sci., 14, 125–142, https://doi.org/10.5194/ms-14-125-2023, https://doi.org/10.5194/ms-14-125-2023, 2023
Short summary
Short summary
A new method to solve the motion generation problem of a spherical four-bar crank slider rigid-body guidance mechanism is introduced. According to the amplitude and phase of the position output and direction output of the mechanism, the method of establishing the mechanism output characteristic database is given. Then the solution method of size parameters is given. According to the database and solution method, the motion generation is realized.
Yuan Huan, Gongchang Ren, Xiangyu Su, and Weizhi Tian
Mech. Sci., 14, 111–123, https://doi.org/10.5194/ms-14-111-2023, https://doi.org/10.5194/ms-14-111-2023, 2023
Short summary
Short summary
A reconfigurable multi-link mechanism is proposed, and based on the multi-link mechanism and the roller fingertip structure, an end effector is designed to manipulate geometric soft fabrics. The working principle of the reconfigurable multi-link mechanism, the structure and grasping mode of the end effector are introduced in detail, and the kinematics analysis and simulation of the end effector are carried out.
Pan Zhou, Jiantao Yao, Hongyu Zhang, Xuanhao Zhang, Shuaiqi kong, and Kunming Zhu
Mech. Sci., 14, 99–109, https://doi.org/10.5194/ms-14-99-2023, https://doi.org/10.5194/ms-14-99-2023, 2023
Short summary
Short summary
Lightweight and stable continuum robot design is a challenge. We propose a 65 g continuum robot formed using cruciform-arranged elastic sheets. It has low coupling, better bending characteristics in the deformation direction, and a large load capacity in the non-deformation direction, providing a new configuration for lightweight and dexterous continuum robots. Its kinematics model accuracy is experimentally verified. Nucleic acid detection demonstration proves its dexterity and adaptability.
Da Song, Xinlei Xiao, Gang Li, Lixun Zhang, Feng Xue, and Lailu Li
Mech. Sci., 14, 19–32, https://doi.org/10.5194/ms-14-19-2023, https://doi.org/10.5194/ms-14-19-2023, 2023
Short summary
Short summary
The haptic interactive robot based on a cable-driven parallel mechanism studied in this paper is mainly used for interactive training between an astronaut and a virtual environment. This haptic interactive robot can accurately simulate the motion and mechanical characteristics of objects in a microgravity environment and can safely interact with astronauts.
Minghui Zhang and Yiming Su
Mech. Sci., 14, 1–13, https://doi.org/10.5194/ms-14-1-2023, https://doi.org/10.5194/ms-14-1-2023, 2023
Short summary
Short summary
A new type of wheel–leg deformation mechanism, based on an electromagnetic clutch and gear rack transmission mechanism, is designed for moving on complex terrain. The walking model is established to study the kinematics characteristics and obstacle-surmounting performance of the mechanism. The stability cone method is used to evaluate the rollover stability and anti-interference ability in order to ensure the normal operation of the mechanism.
Guoxing Zhang, Jianliang He, Jinwei Guo, and Xinlu Xia
Mech. Sci., 13, 1019–1029, https://doi.org/10.5194/ms-13-1019-2022, https://doi.org/10.5194/ms-13-1019-2022, 2022
Short summary
Short summary
The closed-form dynamics equation of the 1.8 m aperture parallel antenna is established. The relationship between the mechanism's natural frequency, displacement response, and resonance frequency is obtained. Based on the dynamic model, the closed-loop motion control strategy of the parallel antenna mechanism is established. The tracking error of the pitch and azimuth motion of the parallel antenna in the workspace is within ±0.05°.
Jinnan Lu and Yang Liu
Mech. Sci., 13, 979–990, https://doi.org/10.5194/ms-13-979-2022, https://doi.org/10.5194/ms-13-979-2022, 2022
Short summary
Short summary
Aiming at the potential safety problems caused by the looseness of bucket teeth of the electric shovel, we propose an improved YOLOX algorithm. After introducing the dilated CBAM, the deep separable convolution, and model compression, the mAP is decreased by 0.33 %, the detection speed is increased by 11.9 fps, and the model volume is reduced to 29.46 % of the YOLOX model. It provides a theoretical basis and technical support for the development of intelligent mines and mining intelligence.
Qiang Yin, Junpeng Yu, Shaoyun Song, Yonglin Zhang, Gang Zhao, Zhiqiang Hao, and Ao Hu
Mech. Sci., 13, 961–978, https://doi.org/10.5194/ms-13-961-2022, https://doi.org/10.5194/ms-13-961-2022, 2022
Short summary
Short summary
In order to store grain in large warehouses, a process is required that will prevent the effects of mildew and heat. Real-time monitoring of the grain status is needed. Using the information obtained from the monitoring system, corresponding measures were taken for the heating and mildew points in the grain pile. We proposed a drill which is a granary grain condition detector. It can be equipped with temperature, CO2, and humidity sensors and gather information by entering the grain pile.
Yongping Liu and Dengqiu Ma
Mech. Sci., 13, 909–920, https://doi.org/10.5194/ms-13-909-2022, https://doi.org/10.5194/ms-13-909-2022, 2022
Short summary
Short summary
Firstly, the tooth surface modification method based on the parabolic forming blade and cutter inclination was proposed. Next, the modified tooth surface equation was deduced and the 3D reconstruction of the modified tooth surface is realized. Then, the influence of modification parameters on tooth surface curvature characteristics was analysed. Finally, the tooth contact analysis model was established to discuss the influence of modification parameters on the elliptical contact area.
Yongming Liu, Lei Fu, Zhuanzhe Zhao, Qiang Ma, Yujian Rui, and Zhen Zhang
Mech. Sci., 13, 855–866, https://doi.org/10.5194/ms-13-855-2022, https://doi.org/10.5194/ms-13-855-2022, 2022
Short summary
Short summary
The coaxiality–geometric hysteresis model of the RV reducer transmission system is established, and the model is simulated and analyzed with Adams software. The results show that coaxiality is one of the main error factors affecting hysteresis. This research can provide a theoretical basis and reference materials for the measurement and design of RV reducer hysteresis, as well as the design of the RV reducer performance high-precision detection device and its adjustment mechanism.
Gang Chen, Zhenyu Wang, Jiajun Tu, and Donghai Wang
Mech. Sci., 13, 831–842, https://doi.org/10.5194/ms-13-831-2022, https://doi.org/10.5194/ms-13-831-2022, 2022
Short summary
Short summary
In the research and development process of underwater motion control of the beaver-like robot, the hind leg and tail are the main actuators. In order to estimate the driving force of the robot autonomously during underwater movement, we propose this model, which can quickly and easily infer the force of the hind leg on the body. The correctness of this model is verified by experiments and simulations.
Chia-Wei Juang, Chi-Shiun Jhuang, and Dar-Zen Chen
Mech. Sci., 13, 817–830, https://doi.org/10.5194/ms-13-817-2022, https://doi.org/10.5194/ms-13-817-2022, 2022
Short summary
Short summary
This paper proposes a spring efficiency assessment and the efficient use of springs methods for a static spring-balanced manipulator. Gravity is balanced by springs; however, it also contains counter-effects between springs. Conceptually, with fewer counter-effects between springs, there is less burden on the spring system, which means that the springs are used more efficiently. Through adjustment of the springs' attachment and parameters, a method to use springs efficiently is developed.
Yi Zheng, Minghua Liu, Baoshun Li, Guoqing Ma, and Maohua Xiao
Mech. Sci., 13, 725–733, https://doi.org/10.5194/ms-13-725-2022, https://doi.org/10.5194/ms-13-725-2022, 2022
Short summary
Short summary
In order to improve the structural performance of the out-of-pipe pipe-climbing robot, the out-of-pipe pipe-climbing robot is optimized. The structure and size of the robot was optimized. Static and modal analyses were then performed on key robot components and ANSYS was used for topology optimization. It was found the weight of the optimized frame and clamping arm were respectively reduced by 24 % and 20 %, and the maximum stress was respectively reduced by 46 % and 20 %.
Ruoyu Tan, Jieji Zheng, Bin Yu, Baoyu Li, Dapeng Fan, and Xin Xie
Mech. Sci., 13, 687–699, https://doi.org/10.5194/ms-13-687-2022, https://doi.org/10.5194/ms-13-687-2022, 2022
Short summary
Short summary
A novel hollow-ring permanent magnet brake integrated in robot joints is proposed, which allows the brake to require much less axial space and provides more than 1.5 times braking torque for the same volume as the conventional electromagnetic-spring friction brake. A coupled dynamics model of the proposed brake is developed from machine-electric-magnetic aspects. The 3D model of the brake is simulated through finite-element software. The theoretical models are verified through experiments.
Yingxian Wang, Rongjiang Cui, and Jinxi Chen
Mech. Sci., 13, 585–591, https://doi.org/10.5194/ms-13-585-2022, https://doi.org/10.5194/ms-13-585-2022, 2022
Short summary
Short summary
This paper use the topological characteristic constants for isomorphism identification, such as the power value sequence (PVS), least distance matrix sequence (LDMS), and loop number (LN). The fourth PVS, the LDMS, and the LN are compared and arranged in descending order, forming a strong complementary chain. Our results show that solving the problem of the isomorphism identification of the kinematic chain (KC) based on graph theory definition has no advantage in efficiency.
Zhanxin Xie and Zheng Yan
Mech. Sci., 13, 559–575, https://doi.org/10.5194/ms-13-559-2022, https://doi.org/10.5194/ms-13-559-2022, 2022
Short summary
Short summary
Robotic ultrasonic scanning needs to apply an appropriate force for a long time during the acquisition process. Excessive contact force may lead to deformation and even hurt the patient, while insufficient force would lead to poor image quality. We proposed a varying rate hybrid position–impedance control strategy, which can partly play the role of an ultrasound sonographer and serve as a medical assistant to reduce their workload.
Dake Tian, Haiming Gao, Lu Jin, Rongqiang Liu, Yu Zhang, Chuang Shi, and Jiewei Xu
Mech. Sci., 13, 519–533, https://doi.org/10.5194/ms-13-519-2022, https://doi.org/10.5194/ms-13-519-2022, 2022
Short summary
Short summary
Space deployable antenna is a new type of space structure, and one of the key payloads of spacecraft, which is widely used in mobile communication, navigation and remote sensing, deep space exploration, military reconnaissance, and other fields of science and technology and national defense. Aiming at the urgent need for the development of space deployable antenna with large aperture and a high storage rate, a new configuration of a multifold rib modular deployable antenna mechanism is proposed.
Xuesong Dai, Yongde Zhang, Jingang Jiang, Bing Li, and Sihao Zuo
Mech. Sci., 13, 399–409, https://doi.org/10.5194/ms-13-399-2022, https://doi.org/10.5194/ms-13-399-2022, 2022
Short summary
Short summary
Transrectal prostate brachytherapy (BT) can effectively treat prostate cancer. During the operation, doctors need to hold the ultrasound probe for repeated adjustments, which makes it difficult to ensure the efficiency, accuracy, and safety of the operation. We designed an 11 DOF (degrees of freedom) active and passive transrectal BT robot based on the analysis of the transrectal prostate BT process.
Maria Paterna, Stefania Magnetti Gisolo, Carlo De Benedictis, Giovanni Gerardo Muscolo, and Carlo Ferraresi
Mech. Sci., 13, 387–398, https://doi.org/10.5194/ms-13-387-2022, https://doi.org/10.5194/ms-13-387-2022, 2022
Short summary
Short summary
We present a novel exoskeleton based on deformable pneumatic actuators, known as McKibben muscles or artificial muscles. The aim of this system is to support a worker during overhead tasks, in which they need to lift the arms and hold that position for a long time. Simulations have been performed, starting from a mathematical model of the exoskeleton and of the artificial muscle. A first architecture of the complete device is also presented.
Weiwei Hong, Jinxi Chen, Bingliang Ye, and Rongjiang Cui
Mech. Sci., 13, 353–359, https://doi.org/10.5194/ms-13-353-2022, https://doi.org/10.5194/ms-13-353-2022, 2022
Short summary
Short summary
To obtain all mechanical schemes, scholars in this field have proposed an innovative design method using kinematic chain configuration synthesis. However, the existing innovative design method easily produces redundant design schemes. We analyze the similar component discrimination method for mechanisms from the perspective of graph theory and apply it to the specialization of topological graphs to solve the problem of redundant design schemes.
Ying Lin, Qian Chen, Haijun Zhang, Ye Ma, Wenlian Zeng, Guojun Wei, Hongxiang Wang, and Maohua Xiao
Mech. Sci., 13, 225–237, https://doi.org/10.5194/ms-13-225-2022, https://doi.org/10.5194/ms-13-225-2022, 2022
Short summary
Short summary
A positioning system for ultra-wideband (UWB) electric micro-tillers suitable for complex greenhouse environments was designed as the basis for realising unmanned micro-tillers to address the problem of frequent safety accidents of existing micro-tillers. The positioning system of the greenhouse electric micro-tiller designed in this paper demonstrates a stable performance and positioning accuracy to meet the needs of greenhouse rotary tillage operations.
Xinyan Qin, Bo Jia, Jin Lei, Jie Zhang, Huidong Li, Bo Li, and Zhaojun Li
Mech. Sci., 13, 257–273, https://doi.org/10.5194/ms-13-257-2022, https://doi.org/10.5194/ms-13-257-2022, 2022
Short summary
Short summary
Power line inspection not only wastes human and material resources, but also has a high-risk factor for manual inspection of power lines. Therefore, based on previous researchers, we designed a novel power line inspection robot. We also investigate walking stability of the robot on the line when encountering working conditions with crossing wind, since the power line is about 50–60 m from the ground and the inspection robots are greatly affected by wind.
Luis Daniel Filomeno Amador and Eduardo Castillo Castañeda
Mech. Sci., 13, 31–39, https://doi.org/10.5194/ms-13-31-2022, https://doi.org/10.5194/ms-13-31-2022, 2022
Short summary
Short summary
In mobile robot development, the designer focuses on the novelty of the final element, leaving out the mobile platform evolution; the chief problem with wheeled mobile robots is the restricted movement in the workspace due to the necessity for the system's reorientation. Our goal is to realize a wheeled mobile robotic system that can generate an omnidirectional displacement without the need to redirect the wheels, thus guaranteeing continuous operation.
Dinh Tung Vo, Sergey Kheylo, and Van Quoc Nguyen
Mech. Sci., 13, 23–30, https://doi.org/10.5194/ms-13-23-2022, https://doi.org/10.5194/ms-13-23-2022, 2022
Short summary
Short summary
The proposed approach to assessing the kinematic accuracy allows one to determine the deviations in the output link using the theory of accuracy. This allows one to determine the deviations in the output link at any point in the working area and propose constructive solutions for its compensation. This approach to determining the positioning error makes it possible to calculate the deviations in the output link for similar mechanisms of a parallel structure.
Zhen Song, Zirong Luo, Guowu Wei, and Jianzhong Shang
Mech. Sci., 12, 1115–1136, https://doi.org/10.5194/ms-12-1115-2021, https://doi.org/10.5194/ms-12-1115-2021, 2021
Short summary
Short summary
It is more efficient and safe to use a sub robot to replace the mother robot to perform space exploration tasks full of challenges. A novel three-rocker-arm six-wheeled robot with adaptive obstacle-crossing capability was designed to form a sub-parent exploration system with a large robot and to perform exploration tasks. A prototype of the robot is developed, and the experiment results show that the robot can maintain stability in rugged terrain and has excellent ability to cross obstacles.
Chao Liu, Ning Ding, Jingsong Duan, Lili Zhou, Shanfu Cui, Shuna Jiang, and Aofei Li
Mech. Sci., 12, 1105–1113, https://doi.org/10.5194/ms-12-1105-2021, https://doi.org/10.5194/ms-12-1105-2021, 2021
Short summary
Short summary
In this paper, we use the folded section hypothesis to determinate the ratchet tooth root bending stress and provide a normal mathematical model to calculate it. This model has been proved by the finite element analysis method and the ratchet experiment. It is recommended that this model be used to predict the ratchet tooth root bending stress in the ratchet design process.
Zhiguo Lu, Guoshuai Liu, Haibin Zhao, Ruchao Wang, and Chong Liu
Mech. Sci., 12, 1073–1081, https://doi.org/10.5194/ms-12-1073-2021, https://doi.org/10.5194/ms-12-1073-2021, 2021
Short summary
Short summary
This paper designs a type of bionic-gibbon robot with three links and two grippers. We apply the sliding-mode control to the swing motion of the robot. The bionic-gibbon robot can complete continuous brachiation motion on the irregularly distributed bars. Besides, compared with the two-link structure, the three-link structure introduced in this paper improves the swing efficiency and increases the swing height of the robot.
Qitao Huang, Peng Wang, Bowen Li, and Qingjun Yang
Mech. Sci., 12, 1027–1036, https://doi.org/10.5194/ms-12-1027-2021, https://doi.org/10.5194/ms-12-1027-2021, 2021
Short summary
Short summary
The electrically driven Stewart platform (EDSP) is used widely. However, the passive rotation (PR) on driven branch chains can generate posture error on the end effector. Compensation control strategy is designed to avoid effects of PR on posture accuracy of the 6-DOF (degrees of freedom) EDSP based on calculation and analysis. The validity of analysis and the effectiveness of the compensation method used to improving posture accuracy are proven by simulation and experiments on a 6-DOF EDSP.
Fadi Nassar and Lionel Birglen
Mech. Sci., 12, 1037–1049, https://doi.org/10.5194/ms-12-1037-2021, https://doi.org/10.5194/ms-12-1037-2021, 2021
Short summary
Short summary
This paper presents the force analysis and optimization of four versions of self-adaptive robotic fingers based on the simplest closed-loop 1 degree-of-freedom mechanism possible, namely the four-bar linkage. Two of these versions include prismatic joints. It was concluded that simpler designs in adaptive fingers do not necessarily mean weaker performances since the results are at least comparable with other designs with more degrees of freedom.
Lei Zhang, Guangyao Ouyang, and Zhaocai Du
Mech. Sci., 12, 1017–1026, https://doi.org/10.5194/ms-12-1017-2021, https://doi.org/10.5194/ms-12-1017-2021, 2021
Short summary
Short summary
To solve the kinematics mapping problem for the joint space and the drive space of a hyper-redundant manipulator based on flexible cable actuation, which is the key for hyper-redundant manipulators to move strictly according to trajectory planning and avoid obstacles, a decoupling method for kinematics analyses of the flexible cable actuation space and the joint rotation space was proposed.
Jacek Harazin and Andrzej Wróbel
Mech. Sci., 12, 959–969, https://doi.org/10.5194/ms-12-959-2021, https://doi.org/10.5194/ms-12-959-2021, 2021
Short summary
Short summary
This article contains new propositions for modelling piezoelectric stack models by using existing classical and non-classical methods with the aim of improving piezoelectric stack capabilities. Polynomial chain fractioning is used to obtain a mechanical model with a cascade structure. To verify model output frequencies and amplitudes, edge graphs and structural numbers are used. With the help of Kelvin–Voigt, Mason and Maxwell slip models, an electromechanical model solutions are proposed.
Weiwei Lin, Kunjing Chen, Yuan Gao, Aihua Chen, Fufu Yang, and Huijuan Feng
Mech. Sci., 12, 933–943, https://doi.org/10.5194/ms-12-933-2021, https://doi.org/10.5194/ms-12-933-2021, 2021
Short summary
Short summary
The problem of inverse folding, determining the distribution of creases according to the desired shape, requires luck and artist inspiration, and it is a very complicated process. Here, we try to solve an inverse folding problem about a folding toy and get some kirigami patterns. It opens up a new way to solve the problem and can also help students understand the theory of mechanisms and machines.
Rui Guo, Yongqiao Wei, Yongping Liu, Dawei Li, Dong Yang, and Gang Zhao
Mech. Sci., 12, 923–932, https://doi.org/10.5194/ms-12-923-2021, https://doi.org/10.5194/ms-12-923-2021, 2021
Short summary
Short summary
The variable hyperbolic circular-arc-tooth-trace (VH-CATT) cylindrical gear is a new type of gear. In order to research the contact characteristics of the VH-CATT cylindrical gear, tooth surface mathematical models of this kind of gear pair are derived based on the forming principle of the rotating double-edged cutting method with great cutter head in this regard.
Qing Yin, Jianli Zhao, Yong Liu, and Yisheng Zhang
Mech. Sci., 12, 863–873, https://doi.org/10.5194/ms-12-863-2021, https://doi.org/10.5194/ms-12-863-2021, 2021
Short summary
Short summary
The approximate calculation of a Stockbridge type damper's natural frequencies and its sensitivity were studied. The low-order frequency is highly sensitive to the cable's length, moderately sensitive to the damper's mass, and slightly sensitive to the eccentric distance and the damper's gyration radius. The high-order frequency is highly sensitive to the cable's length and the damper's gyration radius, moderately sensitive to the damper's mass, and slightly sensitive to the eccentric distance.
Meng Sang, Kang Huang, Yangshou Xiong, Guangzhi Han, and Zhenbang Cheng
Mech. Sci., 12, 847–861, https://doi.org/10.5194/ms-12-847-2021, https://doi.org/10.5194/ms-12-847-2021, 2021
Short summary
Short summary
Few pieces of literature could be found on vibration investigations of the 3K planetary gear set, a basic planetary drive structure with a more compact structure and wider transmission ratio range than the 2K-H. In this paper, the features of casing vibration and output torsional vibration are analyzed by establishing a dynamics model of a 3K-II gearbox. The advantages and disadvantages of these two vibration signals as a basis for 3K planetary gear system fault diagnosis are also compared.
Cited articles
Bai, S., Hansen, M. R., and Angeles, J.: A robust forward-displacement analysis of
spherical parallel robots, Mech. Mach. Theory, 44, 2204–2216, 2009.
Bai, S., Li, X., and Angeles, J.: A review of spherical motion generation using
either spherical parallel manipulators or spherical motors, Mech. Mach.
Theory, 140, 377–388, https://doi.org/10.1016/j.mechmachtheory.2019.06.012, 2019.
Boscariol, P., Gasparetto, A., and Scalera, L.: Efficient closed-form solution of the
kinematics of a tunnel digging machine, J. Mech. Rob., 9, 1–13, https://doi.org/10.1115/1.4035797, 2017.
Chase, T. R. and Mirth, J. A.: Circuits and branches of single degree-of-freedom
planar linkages, J. Mech. Des. Trans. ASME, 115, 223–230, https://doi.org/10.1115/1.2919181, 1993.
Danaei, B. and Arian, A.: Tale Masouleh M, Kalhor A, Dynamic modeling and base
inertial parameters determination of a 2-DOF spherical parallel mechanism,
Multibody Syst. Dynam., 41, 367–390, https://doi.org/10.1007/s11044-017-9578-3, 2018.
Davis, H. P. and Chase, T. R.: Stephenson chain branch analysis: four generic
stationary configurations and one new linkage polynomial, in: Proceedings of
the 1994 ASME Design Technical Conferences, 11–14 September, Vol. 70, .
359–367, 1994.
Di Gregorio, R.: Analytical method for the singularity analysis and
exhaustive enumeration of the singularity conditions in
single-degree-of-freedom spherical mechanisms, Proc. Inst. Mech. Eng. Pt. C, 227, 1830–1840, https://doi.org/10.1177/0954406212469328, 2018.
Dou, X. H. and Ting, K. L.: Branch analysis of geared five-bar chains, J. Mech.
Des., 118, 384–389, https://doi.org/10.1115/1.2826897, 1996.
Duffy, J.: Analysis of Mechanisms and Robot Manipulators, John Willey and
Sons, New York, 56–58, 1980.
Gosselin, C. and Angeles, J.: Singularity Analysis of Closed-Loop Kinematic
Chains, IEEE Trans. Rob. Autom., 6, 281–290, 1990.
Duan, X., Yang, Y., and Cheng, B.: Modeling and analysis of a 2-DOF spherical
parallel manipulator, Sensors, 16, 1848, https://doi.org/10.3390/s16091485, 2018.
Elgolli, H., Houidi, A., Mlika, A., and Romdhane, L.: Analytical analysis of the
dynamic of a spherical parallel manipulator, Int. J. Adv. Manuf. Technol., 101, 859–871, https://doi.org/10.1007/s00170-018-2939-0, 2019.
Gosselin, C. M. and Hamel, J. F.: Agile eye: A high-performance
three-degree-of-freedom camera-orienting device, in: Proceedings of the 1994
IEEE International Conference on Robotics and Automation, 8–13 May,
1, 781–786, https://doi.org/10.1109/ROBOT.1994.351393, 1994.
Hernandez, S., Bai, S., and Angeles, J.: The desion of a chain of spherical
Stephenson mechanisms for a gearless robotic pitch-roll wrist, J. Mech. Des.
Trans ASME, 128, 422–429, https://doi.org/10.1115/1.2167653,
2006.
Hunt, K. H.: Kinematic Geometry of Mechanism, Oxford University Press, USA, 112–115,
1978.
Kong, X. and Gosselin, C. M.: Type Synthesis of 3-DOF Spherical Parallel
Manipulators Based on Screw Theory, J. Mech. Des. Trans. ASME, 126, 101–108,
https://doi.org/10.1115/1.1637655, 2004.
Li, T. and Payandeh, S.: Design of spherical parallel mechanisms for application
to laparoscopic surgery, Robotica, 20, 133–138, https://doi.org/10.1017/S0263574701003873, 2002.
Liu, Y. W. and Ting, K. L.: Rotatability laws for spherical n-bar kinematic
chains, in: 22nd Biennial Mechanisms Conference, 13–16 September, Vol. 46,
387–394, 1992.
Mirth, J. A.: Circuit rectification for four precision position synthesis of
four-bar and watt six-bar linkages, J. Mech. Des. Trans. ASME, 117, 612–619,
https://doi.org/10.1115/1.2826729, 1995.
Mirth, J. A. and Chase, T. R.: Circuit analysis of watt chain six-bar mechanisms, J.
Mech. Des. Trans. ASME, 115, 214–222, https://doi.org/10.1115/1.2919180, 1993.
Nelson, C. A., Laribi, M. A., and Zeghloul, S.: Optimization of a Redundant Serial
Spherical Mechanism for Robotic Minimally Invasive Surgery, Comp Kine,
126–134, https://doi.org/10.1007/978-3-319-60867-9_15, 2018.
Nie, L. and Wang, J.: Branch identification of spherical six-bar linkages, in:
Proceedings of ASME 2018 International Design Engineering Technical
Conferences and Computers and Information in Engineering Conference, 21–24 August, V05BT07A072, https://doi.org/10.1115/DETC2016-59018,
2018.
Norton, R. L.: Design of machinery: an introduction to the synthesis and
analysis of mechanisms and machines, Boston, McGraw-Hill Higher Education, 191 pp.,
2004.
Palpacelli, M., Palmieri, G., Carbonari, L., and Corinaldi, D.: Sensitivity Analysis
and Model Validation of a 2-DoF Mini Spherical Robot, J. Intell. Rob. Syst.
Theor. Appl., 91, 155–163, https://doi.org/10.1007/s10846-017-0679-2, 2018.
Ruth, D. A. and McCarthy, J. M.: Design of spherical 4R linkages for four
specified orientations, Mech. Mach. Theory, 34, 677–692, https://doi.org/10.1016/S0094-114X(98)00048-2, 1999.
Sancisi, N., Parenticastelli, V., and Baldisserri, B.: Validation of a one degree
– of – freedom spherical model for kinematics analysis of the human ankle
joint, J. Foot Ankle Res., 5, 13 pp.,
https://doi.org/10.1186/1757-1146-5-S1-P13, 2017.
Sun, J., Liu, W., and Chu, J.: Synthesis of spherical four-bar linkage for open
path generation using wavelet feature parameters, Mech. Mach. Theory,
128, 33–46, https://doi.org/10.1016/j.mechmachtheory.2018.05.008, 2018.
Ting, K. L.: Mobility criteria of single-loop N-bar linkages, J. Mech. Transm.
Autom. Des., 111, 504–507, https://doi.org/10.1115/1.3259029,
1989.
Ting, K. L.: Branch and dead position problems of N-bar linkages, in: 14th
Biennial Conference on Mechanical Vibration and Noise, 19–22 September, Vol.
65, 459–465, 1993.
Ting, K. L.: Mobility criteria of geared five-bar linkages, Mech. Mach. Theory,
29, 251–264, https://doi.org/10.1016/0094-114X(94)90034-5,
1994.
Ting, K. L.: On the input joint rotation space and mobility of linkages, J.
Mech. Des. Trans. ASME, 130, 923031–9230312, https://doi.org/10.1115/1.2943299, 2008.
Ting, K. L. and Dou, X. H.: Classification and branch analysis of Stephenson
Six-bar Chains, Mech. Mach. Theory, 31, 283–295, https://doi.org/10.1016/0094-114X(95)00075-A, 1996.
Ting, K. L. and Liu, Y. W.: Rotatability laws for N-bar kinematic chains and their proof. J Mech Des, Trans. ASME, 113, 32–39, https://doi.org/10.1115/1.2912747, 1991.
Ting, K. L., Wang, J., Xue, C., and Currie, K. R.: General mobility identification
and rectification of watt six-bar linkages, in: 2007 ASME International
Design Engineering Technical Conferences and Computers and Information in
Engineering Conference, 4–7 September, 8, 439–448, https://doi.org/10.1115/DETC2007-34584, 2008.
Ting, K. L., Wang, J., Xue, C., and Currie, K. R.: Full rotatability and singularity
of six-bar and geared five-bar linkages, J. Mech. Robot., 2, 1–9, https://doi.org/10.1115/1.4000517, 2010.
Wampler, C. W.: Displacement Analysis of Spherical Mechanisms Having Three or
Fewer Loops, J. Mech. Des. Trans. ASME, 126, 93–100, https://doi.org/10.1115/1.1637653, 2004.
Wang, J., Ting, K. L., and Xue, C.: Discriminant method for the mobility
identification of single degree-of-freedom double-loop linkages, Mech. Mach.
Theory, 45, 740–755, https://doi.org/10.1016/j.mechmachtheory.2009.12.004, 2010.
Wu, G. and Bai, S.: Design and kinematic analysis of a 3-RRR spherical parallel
manipulator reconfigured with four–bar linkages, Rob. Comput. Integr. Manuf.,
56, 55–65, https://doi.org/10.1016/j.rcim.2018.08.006, 2019.
Yan, H. S. and Wu, L. L.: On the dead-center positions of planar linkage
mechanisms, J. Mech. Des. Trans. ASME, 111, 40–46, 1989.
Yang, Z. F. and Xu, L. J.: Synthesis of spherical six-bar path generation mechanisms, J.
Sichuan University (Engineering Science Edition), 32, 48–50,
2005.
Short summary
The main contribution of this paper is to present a kind of 2 DOF seven-bar SPM containing two five-bar spherical loops, which has the advantages of high reaction speed, accuracy rating, and rigidity. And based on the unusual actuated choices and symmetrical loop structure, an approach is provided to identify singularities and branches of this kind of 2 DOF seven-bar SPM. The proposed method is visual and offers geometric insights into understanding the formation of mobility using branch graphs.
The main contribution of this paper is to present a kind of 2 DOF seven-bar SPM containing two...
