Articles | Volume 12, issue 1
https://doi.org/10.5194/ms-12-639-2021
© Author(s) 2021. 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-12-639-2021
© Author(s) 2021. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Research article
| 
10 Jun 2021
Research article |
| 10 Jun 2021
| 10 Jun 2021
Design and evaluation of a novel upper limb rehabilitation robot with space training based on an end effector
Qiaoling Meng
Institute of Rehabilitation Engineering and Technology, University of Shanghai for Science and Technology, Shanghai 200093, China
Shanghai Engineering Research Center of Assistive Devices, Shanghai 200093, China
Key Laboratory of Neural-functional Information and Rehabilitation Engineering of the Ministry of Civil Affairs, Shanghai 200093, China
Zongqi Jiao
Institute of Rehabilitation Engineering and Technology, University of Shanghai for Science and Technology, Shanghai 200093, China
Shanghai Engineering Research Center of Assistive Devices, Shanghai 200093, China
Key Laboratory of Neural-functional Information and Rehabilitation Engineering of the Ministry of Civil Affairs, Shanghai 200093, China
Hongliu Yu
CORRESPONDING AUTHOR
Institute of Rehabilitation Engineering and Technology, University of Shanghai for Science and Technology, Shanghai 200093, China
Shanghai Engineering Research Center of Assistive Devices, Shanghai 200093, China
Key Laboratory of Neural-functional Information and Rehabilitation Engineering of the Ministry of Civil Affairs, Shanghai 200093, China
Weisheng Zhang
Institute of Rehabilitation Engineering and Technology, University of Shanghai for Science and Technology, Shanghai 200093, China
Shanghai Engineering Research Center of Assistive Devices, Shanghai 200093, China
Key Laboratory of Neural-functional Information and Rehabilitation Engineering of the Ministry of Civil Affairs, Shanghai 200093, China
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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
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Yingxian Wang, Rongjiang Cui, and Jinxi Chen
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Zhanxin Xie and Zheng Yan
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Dake Tian, Haiming Gao, Lu Jin, Rongqiang Liu, Yu Zhang, Chuang Shi, and Jiewei Xu
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Xuesong Dai, Yongde Zhang, Jingang Jiang, Bing Li, and Sihao Zuo
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Mech. Sci., 13, 353–359, https://doi.org/10.5194/ms-13-353-2022, https://doi.org/10.5194/ms-13-353-2022, 2022
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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.
Guiying Wang, Xigui Wang, Yongmei Wang, and Baixue Fu
Mech. Sci., 12, 735–749, https://doi.org/10.5194/ms-12-735-2021, https://doi.org/10.5194/ms-12-735-2021, 2021
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An electrohydraulic servo four-legged heavy-duty (FLHD) robot has been designed and developed. An integration layout cylinder design scheme for a non-lightweight hydraulic servo four-legged robot with high loads and torque of the hip joint is proposed, and the mathematical element analysis model for a parallel-executed cylinder (PEC) system is derived. A design idea of a force–position hybrid control scheme is determined for the PEC.
Xigui Wang, Siyuan An, Yongmei Wang, Jiafu Ruan, and Baixue Fu
Mech. Sci., 12, 701–714, https://doi.org/10.5194/ms-12-701-2021, https://doi.org/10.5194/ms-12-701-2021, 2021
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A comparison between the results obtained by the MsP method and the numerical integration method proves that the former is ideal and credible in most regions. The effects of the time-varying parameters and the nonlinear deenthing caused by the gear teeth clearance on the amplitude–frequency characteristics of TsSCS components are studied. This is a part of research on transmission gears' thermal deformation for application in warship power rear drive systems.
Qiaolian Xie, Qiaoling Meng, Qingxin Zeng, Hongliu Yu, and Zhijia Shen
Mech. Sci., 12, 661–675, https://doi.org/10.5194/ms-12-661-2021, https://doi.org/10.5194/ms-12-661-2021, 2021
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This paper proposes a new 13 degrees of freedom equivalent kinematic model for the human upper limb and fully considers the movement characteristics of human upper limbs in anatomy. The proposed model can be utilized to analyze the human upper limb workspace and joint motions. Furthermore, the model can effectively evaluate the existing upper limb exoskeleton and provide suggestions for structural improvements in line with human motion.
Lihong Jin, Junpeng Shao, Xigui Wang, Yongmei Wang, and Baixue Fu
Mech. Sci., 12, 539–557, https://doi.org/10.5194/ms-12-539-2021, https://doi.org/10.5194/ms-12-539-2021, 2021
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This study performs an analytical study of the modal and natural frequencies and the vibration types of each order of the gearbox housing structure of a planetary gear reducer (PGR). An optimal housing structure for a PGR with lower acoustic vibrations is designed, and a composite housing structure with damping vibration attenuation and acoustic absorption is proposed. The radiation acoustic characteristics without acoustic protection and damping materials are analyzed.
Zhongxu Tian and Xingxing Lin
Mech. Sci., 12, 559–571, https://doi.org/10.5194/ms-12-559-2021, https://doi.org/10.5194/ms-12-559-2021, 2021
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An analytical method for programming piston displacements for constant flow rate piston pumps is presented. The results show that, with the given transition functions, cam profiles can be designed analytically with parameterized forms, and the maximum accelerations of the pistons are determined by the width of the transition domain and the rotational velocities of the cams, which will affect contact forces between cams and followers.
Yuan Fang, Yunan Zhang, Yinghui Shang, Tao Huang, and Mengfei Yan
Mech. Sci., 12, 511–527, https://doi.org/10.5194/ms-12-511-2021, https://doi.org/10.5194/ms-12-511-2021, 2021
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The center-point steering theory of a traditional tracked vehicle cannot be directly applied to a tracked omni-robot. In this study, for the three typical layout types, rectangular, hybrid, and centripetal, the steady center-point steering motion of a tracked omni-vehicle under skid conditions is analyzed and a correction model is investigated. The correction model can correct the angular velocity and time of the vehicle, as well as give the relationship between the design parameters.
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Short summary
This paper proposes a novel, 4 degrees of freedom, end-effector-based upper limb rehabilitation robot with space training. The robot can assist the human upper limb in performing rehabilitation training of the shoulder flexion/extension and adduction/abduction and elbow flexion/extension. Different from the desktop-type end-effector-based robot, the proposed robot can provide a wide range of shoulder flexion/extension training and cover the range of movement of the human upper limb.
This paper proposes a novel, 4 degrees of freedom, end-effector-based upper limb rehabilitation...
