The proposed VTD-SLAM algorithm has the following advantages. (1) A multiclass feature enhancement and multiclass feature guidance semantic segmentation network (MSNET) is proposed to improve the semantic segmentation ability of dynamic objects. (2) Optimal neighbor pixel matching is used to complete the image of the deleted region. Our method can effectively solve the influence of dynamic objects, so that the SLAM system can operate effectively.

A pedestrian motion fusion model is constructed to predict pedestrian trajectory by the fusion of a Markov model and an improved social force model with a multiple linear regression algorithm. The parameters in the model are calibrated by the maximum likelihood estimation method. Based on pedestrian trajectory prediction, a longitudinal and lateral collision avoidance control strategy is developed. The results show that the proposed strategy can effectively ensure the safety of pedestrians.

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.

To improve the trajectory tracking control performance for robot manipulators subject to uncertainty, a generalized sliding mode controller (SMC) is designed. In the first step, it is assumed that the dynamic model of robot manipulators is precisely known, and an ideal control is designed. In the second step, a smooth-function-based SMC is designed to prevent the chattering phenomenon caused by the discontinuous function and further enhance the robustness performance.

This paper designed a kind of satellite deployment mechanism with a boxed structure and passive torsion joints, and dynamic reactions, including modal, impact, and harmonic  responses, are researched systematically. 

An electro-hydraulic servo system has the characteristics of high control accuracy and fast response so it is widely used in industrial control fields. To address the external load and disturbance problems faced in actual engineering, a dual observer is used to acquire the state and disturbance values and to provide the sliding mode controller to control the system in real time. Comparative simulations are conducted to verify the impact of the control method on the control accuracy.

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.

In this paper, a sliding-mode observer is combined with the voltage model of the motor to construct a closed-loop estimation of the flux linkage so that the influence of external disturbances on the system can be compensated for by the algorithm itself. On the one hand, this improves the anti-interference ability of the system. On the other hand, it also makes the calculation of flux linkage more accurate under an inaccurate initial position.

In order to meet the need for high accuracy in road spectrum reproduction of vehicle durability tests, this paper is based on analysis of factors affecting the accuracy of a test platform. The large load capacity and fully decoupled mechanism proposed in the research work of this paper can improve the road spectrum reproduction accuracy of the vehicle durability test platform and has good application prospects in the field of vehicle durability tests.

This paper investigates the vibration coupling effect and grinding force control of an elastic component grinding system, which is a multi-dimensional coupling system conveying a dynamic interaction between the elastic component and the grinding device during the grinding process. The research results have guiding significance for the vibration control and constant force control of robotic grinding systems for elastic components.

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.

A miniaturized statically balanced compliant mechanism is proposed as a structural solution to effectively lower the working frequencies of vibrational energy harvesters to ultralow levels across a wide bandwidth for practical applications. This mechanism exhibits zero stiffness and zero force within a specific displacement range and stiffness nonlinearity in the overall range. It overcomes the working frequency limit imposed by the size effect, showing great potential application value.

The paper shows that the attitude vector expression for the rod can decrease the difficulty of derivation and expression of the dynamics model. Variation theory can package the closed-loop pose–attitude constraint in the dynamics model, so the constraint does not need to be considered explicitly. Using the geometry modelling method to build the dynamics model of a four-bar mechanism can avoid the repetitive operation of the closed-loop constraint. 

Projection is one of the most fundamental operations of polytopes, and it is widely used in the field of control and optimization. The Equality Set Projection algorithm is a promising method for projection calculation, but it has some shortcomings under the condition of dual degeneracy In this paper. Two improvements are presented to make the Equality Set Projection algorithm become simpler, faster, and easier to implement in the case of dual degeneracy.

In this study, we systematically improved the multi-robot formation control algorithm. We employed a virtual spring approach to stabilize formations, enhanced the Velocity Obstacle algorithm to address collisions in dynamic mobility, and introduced a leader for consistency. Simulations with up to 20 robots confirmed our method's suitability for large-scale formation obstacle avoidance. Position error and path length remained stable as robot numbers increased.

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.

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. 

A time-varying reliability model of parallel systems consisting of beams with crack flaws is developed, considering the dynamic interaction between stress correlation, crack extension correlation, strength degradation correlation, and the random load redistribution. The model can quantitatively analyze the effects of crack extension, strength degradation, load sharing, random load redistribution, and other factors on the time-varying system reliability.

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.

The strength of the front axle of tractors used in rough terrain is crucial in countries in which agriculture is widespread. Thus, it is important to analyze the stress experienced by the front axle, as it eventually leads to cracks and premature failure. This study aims to solve the stresses that occur on the housing of the front axle. The results of a finite element analysis and strain gauge measurements were compared, and a correlation was found with 98 % accuracy.

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.

A piezoelectric ceramic micro-feed tool holder relies on the piezoelectric ceramic inverse piezoelectric effect to achieve high-frequency precision micro-drive, leading to advantages such as a fast response time and high stiffness. In the present study, a new micro-feed tool rest configuration that is driven by piezoelectric ceramics is designed; the flexible driving part of the micro-feed tool rest is optimized by topology optimization.

In this study, to conduct and gain a deeper understanding of the cutting mechanism of SiCp / Al in ultrasonic vibration-assisted turning, this study established a prediction model for the cutting temperature field of SiCp / Al composite materials in UVAC cutting. At the same time, experiments were conducted on processing SiCp / Al composite materials using UVAC, turning SiCp/Al composite materials with a volume fraction of 25 %.

To evaluate the residual stress level in pipeline welding, a finite-element welding model was established, and the influence of welding parameters on the residual stress was analyzed. The ultrasonic LCR stress-detecting method was used to measure the actual residual stress. The comparison results indicate that the finite-element welding model is effective, through which the welding technical parameters can be optimized and the welding residual stress of pipeline can be reduced.

The speed of vehicles has a significant impact on the safety and comfort of driving. When vehicle passes over different speed bumps, it becomes a practical research topic to choose the appropriate speed at which to pass over. In this paper, we establish a multi-objective optimisation method through vehicle dynamics feedback combined with an immune algorithm and then design and carry out the solution process of the vehicle multi-objective optimisation problem.

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.

The relationship between installation error and contact performance was studied. The tooth surface equation and contact ellipse were deduced, and the imprinting experiment was realized. The tooth contact analysis (TCA) model was developed to investigate the influence of the installation error on the contact area. The formulas of the gap and flexibility matrix were given to develop the loaded TCA (LTCA) model. The influence of the installation error on load distribution was investigated.

A new type of parallel six-dimensional force sensor was developed, and artificial neural network technology was used to achieve decoupling of the sensor output data. In addition, a gravity compensation method based on CAD variable geometry is proposed to optimize the performance of the six-dimensional force sensor.

Friction is widely present in moving mechanical systems, and it has a negative impact on the performance of mechanical systems, such as tracking errors during low-speed motion. To overcome the impact of friction on the control accuracy of the system, this paper proposes a dynamic continuous friction model based on numerous current friction models. Based on this friction model, the velocity control mode of the direct-drive system is compensated for, and good results have been achieved.

In the present paper, study on meshing stiffness characteristics of the modified variable hyperbolic circular-arc-tooth-trace cylindrical gears was proposed. The modified tooth surface equation was deduced, and a 3D model was developed. The load tooth contact analysis (LTCA) model was developed. The meshing stiffness calculation method  was proposed and verified by the finite-element calculation. The influence of the load and modification parameters on the stiffness was investigated.