Showing papers in "Mechanism and Machine Theory in 2023"

TL;DR: In this paper , the authors proposed a method of optimizing an electric vehicle (EV) trajectory to reduce energy consumption by using an inverse dynamics model, servo constraints, and the Ritz method.

TL;DR: In this article , a fuzzy gain scheduling proportional-integral-differential (PID) controller based on dynamic characteristics of a hybrid robot named TriMule is presented, which can reduce the effect of dynamic characteristics on control system, thus ensuring satisfactory control performance under any configuration in the task workspace.

TL;DR: In this article , the authors proposed a novel event-based disturbance control together with whole-body stability control, which enables contact-redundancy hexapod robot to stably drive over rough terrain.

TL;DR: In this paper , an improved dynamic model of bearings is proposed, which can accurately simulate the impact characteristics of defective bearings and improve computational efficiency, and the relationship between the horizontal-vertical synchronized root mean square and the defect location dimension in different conditions is mapped using the model.

TL;DR: Inspired by the strong nonlinearity of origami cartons, a novel origami-inspired constant-force mechanism (OriCFM) is systematically studied for obtaining a stable quasi-static constant force output as discussed by the authors .

TL;DR: In this article , a class of five-degree-of-freedom (5-DoF) parallel machining robots with high stiffness-mass ratio, easy installation, compact structure and reconfigurability is designed.

TL;DR: In this article , the authors propose a planar cable-driven parallel robot with 3 degrees of freedom (DoF) and a passive carriage to reduce the variation in the cables direction and therefore in the cable forces, resulting in an increase in the size of the wrench-feasible workspace.

TL;DR: In this article , a compliant quasi-zero-stiffness (CQZS) isolator was proposed to isolate low-frequency torsional vibrations in the shaft system.

TL;DR: In this article , the authors presented a new method of constructing spatial fully compliant parallel mechanisms, where the constant motion transmission characteristic matrix of a spatial 3-degree-of-freedom compliant mechanism is used as the constraint function of topology optimization to control the relationship between input and output.

TL;DR: In this article , a novel normal contact force model considering the energy dissipation for viscoelastic bodies is presented, which is transformed from the stress-strain relation using the Stieltjes convolution.

TL;DR: Wang et al. as discussed by the authors developed a novel diagnosis method based on adaptive scale decomposition and weighted multikernel correntropy (ASD-WMKC) to diagnose the faults of wheelset axle box bearing under strong wheel-rail impact interference and background noise.

TL;DR: In this paper , a general method to manufacture double enveloping worms using a whirl-machining process is proposed, where the tool profile is provided from a straight-lined blade that is tilted with an angle the same as the lead angle of the worm.

TL;DR: In this article , the authors proposed a gear dynamic model considering the thin-walled gear and hollow shafts, which obtains the extra resonant frequency in the high-speed region.

TL;DR: Wang et al. as discussed by the authors presented an improved algorithm of herringbone gear's tooth surface topological modification based on overlap ratio, and the superiority of improved topology modification gear pair is verified from two aspects of statics and dynamics.

TL;DR: In this paper , a two-phase finite element model is proposed to evaluate the working condition of general spur gears based on a two phase approach, and a mesh-force formulation is proposed based on polynomial interpolations of the finite element results to accurately model the contact forces and meshing stiffness.

TL;DR: In this article , the authors describe the theoretical basis of the fully Cartesian coordinates formulation with a generic rigid body and evaluate its performance in the dynamic analysis of planar multibody systems.

TL;DR: In this paper , a simple and efficient, analytical model is presented for the simulation of the mesh stiffness, transmission error, and load sharing for helical gears with profile modification, which has a decisive influence on the induced dynamic load and therefore on the dynamic behavior of the gear pair.

TL;DR: In this paper , the authors proposed a model predictive control (MPC) based on linearized models for tip trajectory tracking of time-varying references in an underactuated, non-minimum phase, two-link multibody system.

TL;DR: In this article , a collision-free inverse kinematics solution for a mobile manipulator is proposed, where the joint variables are decoupled and constrained, and an approach to initialize the variables is proposed.

TL;DR: In this article , a direct preset method for solving ease-off tooth surface of spiral bevel gear is presented, which integrates the preset contact path (CP), geometric transmission error (TE) and curvature of difference curve at the contact point (CDC), which is called CPTE-CDC.

TL;DR: In this paper , a neural network-based approach was proposed to obtain the inverse kineto-static (IKS) as well as the forward kinetostatic (FKS) solution of CDPR with significant cable mass and elasticity.

TL;DR: In this article , a rate-dependent modified generalized Prandtl-Ishlinskii (RMGPI) model was proposed for a vulcanized silicone rubber-based fast pneu-net soft bending pneumatic actuator (fp-SBPA) to describe complicated hysteresis characteristics.

TL;DR: In this paper , a self-optimized ANN methodology is presented to discover more accurate and robust models which can simulate the interaction process between complex geometries, where genetic algorithm combined with sequential quadratic programming (GA-SQP) is utilized to boost the consistent performance of the network.

TL;DR: In this article , a novel SSRMS-type self-reconfigurable space redundant manipulator is proposed to enhance the adaptability of the traditional SSRS-type manipulators in complex on-orbit tasks.

TL;DR: Wang et al. as mentioned in this paper investigated the complex bifurcation behaviors of thick-panel kirigami arrays and proposed a motor-and spring-driven approach to avoid bifurlcation.

TL;DR: In this paper , a ball-ramp electromechanical clutch actuator (BR-ECA) is proposed to achieve accurate gear shifting in a two-speed transmission topology for electric vehicles.

TL;DR: Wang et al. as mentioned in this paper proposed a hierarchical structural pruning-multiscale feature fusion residual network (HSP-MFFRN) for intelligent fault diagnosis (IFD) field.

TL;DR: In this paper , a scale model of the planetary gear transmission system (PGTS) is designed according to the similarity theory, and mechanical power closed test bench is established for the scale model.

TL;DR: In this article , a parabolic cylindrical antenna with great folding efficiency based on two symmetrically arranged Miura-ori thick-panel origami patterns and the removal of partial material from each panel is proposed.

TL;DR: In this paper , a matrix-based method is proposed to search configurations of planetary gear sets (PGT), where the inherent and switchable connection matrix are defined for configuration structure and a detection method of mechanical structural interference is developed.