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.

This paper presents an optimization approach to improving the performance of lattice structures subjected to thermal and mechanical loads. The proposed method is demonstrated through examples of battery packs, L-brackets, and machine tool headstocks. The results of numerical verification show that the proposed method enhances the performance of designed structures greatly compared with traditional solid-design and temperature constraints.

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.

In order to lessen the impact on the team of rehabilitation practitioners and provide patients with a higher-quality rehabilitation process, an ankle rehabilitation robot based on a parallel mechanism is proposed. The feasibility of the ankle rehabilitation robot proposed in this paper is proven by analysis, which lays a foundation for future human–machine experiments. It can act as a reference for future research of the ankle rehabilitation mechanism.

This paper proposes a synthesis method for compliant bistable mechanism based on pole similarity transformation. The rigid components in the synthesis results can self-maintain at two specified positions assigned by the motion task, which are the two stable states of the mechanism. Even if the mechanism deviates from these positions under external forces, it can rely on its own internal forces to return to the stable-state positions.

This paper proposes a new positional control method for soft pneumatic actuators. The pressure parameter feedback model (PPFM) of the airbag is obtained by adjusting the pressure input through a proportional valve, collecting the air pressure inside the airbag and obtaining the airbag expansion height. The pressure input signal is changed according to the PPFM of the airbag to control the position of the soft pneumatic actuator.

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.

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.

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.

A prediction model for surface roughness classification of computer numerical control drills based on fusion of local time–frequency features and global time–frequency features of the Mobilenet_v3_small model is proposed. Correct rates of the training set, validation set, and test set are 85.2%, 84%, and 85.4%. Compared with industrial lightweight network models, this model improved the correctness rates on the training set, validation set, and test set by about 10%, 9%, and 13%, respectively.

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 this paper, a fusion of the improved particle swarm algorithm and proportional–integral–derivative control algorithm in path tracking is investigated to improve the accuracy and robustness of path tracking of automated guided trolleys in complex environments. A robot operating system is introduced to provide a modular solution for the automated guided trolley system, which simplifies the integration of system components and provides a framework for system upgrading and expansion.

Because the wheeled rolling robot has the characteristics of fast movement, high work efficiency and strong bearing capacity, it can be applied to industrial production and detection. Aiming at the problems of low motion efficiency and a large number of drives of the rolling robot based on a parallel mechanism, a new type of wheeled rolling robot composed of a planar 3-RRR parallel mechanism and a spoke-type variable diameter wheel is proposed in this paper.

In this paper, the design principle of the symmetrical spherical parallel mechanism (SPM) is obtained by analyzing the conditions for symmetrical motion of the mechanism. A series of symmetrical SPMs is designed based on the constraint force provided by the branches. The SPM can realize continuous rotation around any line on the mid-plane that passes through the rotation center of the spherical mechanism. This feature has great potential for application in fields such as rehabilitation robotics.

Our research team designed a robotic mechanism inspired by the masticatory system of human beings. It is to be deployed in the food industry, reproducing the chewing behaviors of human beings. Thus, the properties of the newly developed foods can be evaluated in a human-like manner. To facilitate the model-based motion control in real time, a newly developed methodology from the literature is used. Then, the inertia coupling in the joint space control is analyzed.

This study explores the actual demand of wide-frequency vibration isolation and low-frequency shock resistance of a vibration isolation system for complex external excitation of the aircraft turboprop engine. The performance of a type of turbo-propeller engine vibration isolation system at a 1.5–2000 Hz vibration frequency is investigated by combining simulation and experimental research.  It provides the test basis and idea for the optimization of the aero-engine vibration isolation system.

This paper proposes a path-planning method for 3D information collection on the space station surface via a hyper-redundant space robot (HSR). Based on the active information collection method, the collision-free viewpoint trajectory of the space station surface can be planned. The path planning of the space station surface information collection can then be realized by importing the space station model data and performing weight initialization, stochastic search, and continuous optimization. 

This paper designs a linkage-type self-adaptive deformable tracked mechanism module in accordance with the multi-loop mechanism. The mechanism has two modes of forward movement and reverse movement, including deformable tracked-type and rocker arm-type, respectively.  This kind of mechanism has very good terrain adaptability and can deform through passive self-adaptive obstacles, which has certain application prospects in special terrains.

In this paper, a variable structure detection robot for underground rescue is designed for the rescue environment of a 225 mm diameter borehole, combined with the leading arm and the deformable tracks.  A stability criterion based on the contact force between the robot and the road surface (contact force stability criterion, CFSC) is proposed, and an adaptive stability control system of the robot is established in combination with a neural network.

Urban traffic congestion, obstacle avoidance, and driving efficiency are significant challenges for driverless-vehicle path planning in urban environments. The traditional artificial potential field (APF) algorithm is inadequate for meeting efficiency and safety requirements in path planning. This paper proposes a new AS-IAPF path-planning algorithm by introducing stability criteria to enhance target accessibility for autonomous vehicles under dynamic and complex traffic conditions.

Vibration measurement technology based on binocular vision and kinematic decoupling is a new method which can effectively extract vertical vibration signal. The proposed method has the advantages of real-time measurement and low cost and overcomes the limitations of traditional measurement methods in error accumulation.

In order to better imitate the enveloping–grasping function of human fingers and control the grasping morphology of the fingers, a modular gripper is proposed to be controlled using a combined differential control of wires and shape-memory alloy (SMA) springs, and the gripper can actively adjust the grasping morphology of the fingers according to the characteristics of the shape and contour of the objects to be grasped so as to achieve stable and reliable grasping.

In order to effectively improve the running stability of the three-axis emergency aid vehicle and reduce the risk of rollover, a rollover dynamic model with 11 degrees of freedom is established in this paper. A three-axle anti-rollover control strategy based on the cooperation of differential braking and active suspension is proposed. The anti-rollover capability of the vehicle is verified by a mathematical simulation.

Axial-hole assembly is a key step in the assembly of high-integration components of electronic equipment. In order to achieve the precision assembly of high-density axial holes, we propose a high-precision and smooth assembly strategy that combines the manual control of the tandem machine and the positioning accuracy of the parallel robot. This provides strong technical support for the precision assembly of highly integrated components of electronic equipment.

A trajectory prediction model based on Transfomer has been proposed to address the issue of long-term prediction accuracy in complex traffic environments. Optimizing multi-head attention based on knowledge of the scene context and vehicle position generates interactions between maps and agents, as well as between agents themselves. Its effectiveness has been evaluated on the basis of the outdoor dataset, and higher precision was achieved.

In this paper, based on the spatial extension design of a planar 6R single-loop chain, a 4–5R rolling mechanism is proposed, and a set of gait analysis and locomotion strategies are planned for the mechanism. The correctness and feasibility of the theoretical analysis are verified through structural dynamics simulation and prototype design. The theoretical and engineering design basis is laid for the research of the new planar single-loop chain robot.

We presented a graphical method for systematically analyzing traditional Chinese puzzle boxes. It discusses the structural characteristics of puzzle boxes and uses four different types of puzzle boxes as examples of applying the proposed method and representing the opening processes of the puzzle boxes. Traditional Chinese puzzle boxes are diverse and creative, displaying the skilled craftsmanship of ancient artisans. 

This article presents novel rehabilitation training by combining virtual reality technology and a rehabilitation robot. The goal is to provide multiple-information feedback for activities of daily living training. The rehabilitation robot receives data from virtual scenes to provide force feedback, creating a sense of presence. This approach is expected to help patients in the later stages of a stroke to improve their muscle strength and regain their upper-limb motor function.

This paper develops a 4SRRR quadruped wall-climbing robot for demanding on-site work in shipyards and steel-structure manufacturing. A dynamic analytical model is established, replacing Euler–Bernoulli beam elements with Timoshenko beam elements to analyze natural frequencies. Results show that with single-element rods, the error in the first three natural frequencies is under 3.5 %. These findings validate the model's accuracy and support real-world applications. 

This paper presents a novel 6-degree-of-freedom (6-DOF) compliant parallel manipulator, designed with a 6-PSS configuration and leaf spring compliant joints, together with manufacture error identification techniques. These innovations enhance motion accuracy, range and dynamic performance. This manipulator holds promise for applications like optical guidance and chip packaging.

We developed an advanced control system to enhance the comfort of vehicle seats by reducing vibrations. This innovative system combines an adaptive neuro-fuzzy inference system (ANFIS) and active disturbance rejection control (ADRC) to effectively manage the magnetorheological (MR) damper. Our research showed significant improvements in reducing seat vibrations. Moreover, the system's performance has been demonstrated to exceed that of conventional controls.

This paper presents a ring four-array rolling mechanism consisting of four anti-parallelogram mechanisms with revolute joints. The mechanism is connected by four anti-parallelograms in a looped configuration and has a not-totally-closed ring shape. The mechanism has planar and spherical patterns of locomotion: the planar pattern locomotion includes the parallelogram rolling gait and the anti-parallelogram tumbling gait and the spherical pattern locomotion includes the spherical rolling gait.

This paper focuses on vibration suppression and trajectory planning for a two-link flexible manipulator and proposes a novel control method that integrates a modified adaptive particle swarm optimization algorithm (MAPSO) with fuzzy proportional–derivative (PD) control to achieve effective trajectory tracking.

During the construction of a power transmission line, the cross frame is required to protect the existing facilities under the line from a possible tension failure accident. Because of its light weight, low cost, and short construction period, the new type of flexible nylon rope mesh has recently been widely used. This paper introduces dynamic modeling and analysis methods for wire impact flexible cable networks and verifies the effectiveness of the methods through experiments.

This paper proposes a novel dual-tunnel soft pneumatic origami actuator to provide a large maximum shrinkage rate for reciprocating motion. A programmed design method is proposed based on the geometric parameter model and stiffness model of the actuator. In comparison to other actuators, this actuator weighs only 5 g, and the force-to-weight ratio is 600. The maximum shrinkage rate of the actuator is 61 %, increasing the potential for lightweight and compact devices.

This paper focuses on the PRC method for unknown Euler–Lagrange systems with actuator faults and any bounded initial value. The attitude adjustment mechanism of the self-designed spraying robot is equivalent to a two-joint cooperative robot system. The convergence speed was improved to be within 1s. By comparing with traditional control methods, the improvement in control accuracy and convergence speed has been verified.

To solve the flutter identification problem in the machining process of thin-walled parts, an online monitoring method based on continuous wavelet transform (CWT) and convolutional neural network–vision transformer (CNN-ViT) is proposed. First, the CNN model is utilized to extract local features from the image obtained after CWT. Then, the self-attention mechanism of the ViT model is employed to capture the global features of the feature map, and, finally, the classification results are output.

The current closed-loop control of pneumatic systems relies on electronic sensors and controllers. In this work, we have developed an airflow-sensing device and applied it to a pneumatic gripping system. The gripper can automatically sense the distance to objects and achieve active grasping. Our research results provide new solutions for intelligent control of pneumatic systems, freeing them from dependence on electronic devices.

The fuzzy proportional–integral–derivative controller optimized by the particle swarm optimization algorithm eliminates steady-state error, improves response speed, and enhances both system adaptability and disturbance resistance. This approach effectively addresses the inherent uncertainties and nonlinear variations in bolt tightening processes. The average deviation between the tightening torque and target torque measures 0.108 N m, achieving a control accuracy of 0.9%.

In this paper, an entire process of laser cladding repair of a damaged polycrystalline diamond compact (PDC) bit of high value based on a dual-robot system is proposed.

In this paper, a micro-textured coated tool is proposed to improve the cutting performance of the tool by utilizing the synergistic effect of the micro-texture and coating material, and it is found that the coated tool with the micro-texture on its front and back face induces a reduction in the cutting force by 21.57 % and a reduction in the cutting temperature by 7.56 %, which effectively facilitates chip outflow and avoids the buildup of cutting heat on the tool surface.