Article
Computer Science, Interdisciplinary Applications
Yu Chen, Jun Feng, Xu Peng, Yu Sun, Qiang He, Chengtao Yu
Summary: This paper presents the development of a dynamic model for planar multibody systems with clearance joints, using various models to describe the dynamic characteristics of clearance joints and verifying the correctness and effectiveness of the method through experiments.
ENGINEERING WITH COMPUTERS
(2021)
Article
Engineering, Mechanical
Xiulong Chen, Weitao Yang
Summary: The presence of clearances in the mechanism can reduce motion precision and working performance. The 3-RRRRR mechanism requires high precision. Modeling and analysis can verify the impact of axial clearances on the dynamic characteristics of the mechanism and validate the correctness of the mathematical model.
NONLINEAR DYNAMICS
(2021)
Article
Chemistry, Analytical
Zhengfeng Bai, Zhiyuan Ning, Junsheng Zhou
Summary: This study investigates the wear characteristics of dry revolute clearance joints in planar mechanisms using a computational methodology. Models for normal contact force, tangential friction force, and dynamic wear are established. The dynamic wear depths of clearance joints are obtained through two steps: dynamics analysis and wear depth analysis. A planar slider-crank mechanism is used as an example to study the wear characteristics of clearance joints in mechanical systems.
Article
Engineering, Mechanical
Xinchen Zhuang, Tianxiang Yu, Jingyi Liu, Bifeng Song
Summary: This study conducts kinematic reliability analysis of high-precision planar mechanisms experiencing non-uniform wear. A wear prediction method based on Archard's wear model is presented, and the maximum entropy model and numerical integration are used to calculate kinematic reliability. A Monte Carlo simulation based method is developed for reference solution calculation.
MECHANICAL SYSTEMS AND SIGNAL PROCESSING
(2022)
Article
Engineering, Multidisciplinary
Chen Zhi-qun, Qian Lin-fang, Chen Guang-song, Nie Shou-cheng, Yin Qiang, Yue Cai-cheng
Summary: In this study, a modeling method is presented to investigate the dynamic characteristics of a hydraulically driven shell manipulator with revolute clearance joints. The model takes into account the effects of clearance, flexibility of the rotating beam, and the coupled dynamic characteristics of the hydraulic cylinder. A modified contact force model is developed to simulate the physical properties of realistic revolute joints with small clearances, heavy loads, and variable contact stiffnesses and damping coefficients. The system equation of motion, taking into consideration the strong coupling relationship between the hydraulic cylinder and the flexible beam, is established. Experimental validation is achieved through a test system for the shell manipulator, and the effects of clearance size and cylinder support stiffness on the dynamic response are investigated.
DEFENCE TECHNOLOGY
(2022)
Article
Acoustics
Zheng Feng Bai, Xin Jiang, Ji Yu Li, Ji Jun Zhao, Yang Zhao
Summary: This article investigates the dynamic responses of a mechanical system with 3D revolute clearance joint considering both radial and axial clearances, establishing mathematical models and contact force models. Demonstrative application examples are presented to illustrate the dynamic characteristics.
JOURNAL OF VIBRATION AND CONTROL
(2021)
Article
Engineering, Civil
Yanfeng Zheng, Hua-Ping Wan, Jingyao Zhang, Chao Yang, Yaozhi Luo, Makoto Ohsaki
Summary: This paper proposes a practical method for evaluating the dynamic effects of spatial revolute joints with axial and radial clearances, combining local-coordinate representation and finite particle method. It avoids complex iteration by explicitly expressing the geometry and analytically solving the contact states. The feasibility of the method is demonstrated through two numerical examples and a comprehensive discussion on the interactions between joints and flexible components is provided.
INTERNATIONAL JOURNAL OF STRUCTURAL STABILITY AND DYNAMICS
(2021)
Article
Thermodynamics
Xiaofeng Li, Deng Zhao, Fuqi Xie, Shijing Wu, XiaoYong Li
Summary: The study investigates the impact of joint clearance in multi-link mechanisms, finding that the size of clearance and driving speed affect the magnitude of transient impacts. By using flexible rubber sleeves in the clearance joints, the undesired impacts on the mechanical system can be effectively suppressed.
ADVANCES IN MECHANICAL ENGINEERING
(2021)
Review
Computer Science, Software Engineering
Veronika Karl, Frank Poerner
Summary: This article examines a special class of generalized Nash equilibrium problems that cannot be reduced to a single player control problem, finding a sufficient condition for the existence and uniqueness of solutions and presenting a solving method. Numerical examples are used to support the theoretical findings.
OPTIMIZATION METHODS & SOFTWARE
(2021)
Article
Mechanics
Xiulong Chen, Yuefei Tang, Shun Gao
Summary: This study presents a dynamic modeling and analysis method for predicting the impact of wear clearance on precision press mechanism, using a hybrid drive seven-bar press mechanism as an example. By solving contact force, friction force, predicting wear characteristics of joint clearance, and discussing factors affecting wear characteristics and dynamic response, it offers a theoretical basis for dynamic behavior prediction and design support for high-precision presses.
Article
Engineering, Mechanical
Xun Wang, Xiaoting Rui
Summary: This study establishes a rigid-flexible coupling multibody dynamics model of a tracked armored vehicle, considering the clearance between trunnion and bearing. Numerical simulations are performed to analyze the influence of this clearance on the vibration characteristics of the vehicle.
JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY
(2021)
Article
Engineering, Mechanical
Yu Chen, Xuze Wu, Kai Wu, Yu Sun, Chengtao Yu, Xianfei Xia
Summary: This paper proposes an experimental and analytical method to investigate the actual dynamic response of high-precision mechanisms with revolute clearance joints. By considering contact-impact and friction effects, a continuous contact force model and modified Coulomb's friction model are used to describe the contact characteristics between the journal and bearing. A test rig is established to perform dynamic performance tests under different working conditions. Stability analysis, energy analysis, and mathematical statistics parameters are applied to represent the mapping relationship between operational parameters and dynamic behavior. The valuable conclusions can be utilized to reduce vibration, wear, and energy consumption.
JOURNAL OF THE BRAZILIAN SOCIETY OF MECHANICAL SCIENCES AND ENGINEERING
(2022)
Article
Mechanics
Xiulong Chen, Feiyue Zhao
Summary: This paper studies the dynamic response of a novel high-speed structural redundant parallel manipulator considering multiple joints with clearances. The dynamic model is developed and verified, and the influences of different factors on the manipulator's dynamic characteristics are explored. The research contributes to understanding the effect of joint clearances on the overall performance of the manipulator.
MECHANICS BASED DESIGN OF STRUCTURES AND MACHINES
(2023)
Article
Mechanics
P. Millan, J. Pagaimo, H. Magalhaes, J. Ambrosio
Summary: This study investigates the effect of different tangential contact models on the dynamic response of railway vehicles. The results show that the choice of friction models has a significant influence on the dynamic performance of locomotives during curve transitions, while straight tracks and curves with constant radius are relatively unaffected. The study highlights the importance of selecting appropriate friction models and the Stribeck velocity in modelling friction-damped suspensions of railway vehicles.
MULTIBODY SYSTEM DYNAMICS
(2023)
Article
Engineering, Multidisciplinary
Shuaizhen Gu, Ju Chen, Qiang Tian
Summary: To accurately capture the dynamic responses of flexible multibody systems, fine meshes and different integration time steps are required. This study proposes a novel implicit asynchronous variational integrator (AVI) that can be applied to complex flexible multibody systems and improve computation efficiency.
COMPUTER METHODS IN APPLIED MECHANICS AND ENGINEERING
(2022)
Article
Engineering, Multidisciplinary
Haijun Peng, Ningning Song, Ziyun Kan
INTERNATIONAL JOURNAL FOR NUMERICAL METHODS IN ENGINEERING
(2020)
Article
Mechanics
Haijun Peng, Ningning Song, Ziyun Kan
MULTIBODY SYSTEM DYNAMICS
(2020)
Article
Engineering, Mechanical
Ningning Song, Haijun Peng, Ziyun Kan, Biaosong Chen
NONLINEAR DYNAMICS
(2020)
Article
Engineering, Aerospace
Ziyun Kan, Fei Li, Ningning Song, Haijun Peng
Summary: This paper proposes a novel nonlinear complementarity function-based framework to handle cable slacking in tensegrity structures. By reformulating the constitutive relation of cables as a set of equality equations using parametric variables and complementarity conditions, the nonsmooth nature induced by cable slacking can be eliminated, and a continuous, smooth, differentiable problem can be solved using the classical Newton-Raphson method.
Article
Mechanics
Ziyun Kan, Ningning Song, Haijun Peng, Biaosong Chen, Xueguan Song
Summary: This paper presents a novel multibody-based methodology for the mechanical analysis of systems containing clustered cable elements. The study reveals that the friction between the clustered cable and the struts fundamentally alters the system's mechanical behavior, leading to significant differences in tension magnitudes in different segments. The results demonstrate novel dynamic behavior, such as the stick-slip phenomenon at connection points.
INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES
(2021)
Article
Engineering, Mechanical
Mengru Zhang, Haijun Peng, Ningning Song
Summary: Flexible multibody systems with high geometric nonlinearity pose challenges in solving dynamic response optimization problems. Fully coupled optimization methods are crucial when dealing with velocity vector-related objective functions or multicomponent-based constraints. The proposed semi-analytical sensitivity analysis approach combines finite difference and analytic methods to address the bottleneck in sensitivity calculation for fully coupled optimization methods. Verification through numerical examples demonstrates the effectiveness and engineering application value of fully coupled optimization in flexible multibody system dynamics.
MECHANISM AND MACHINE THEORY
(2021)
Article
Mathematics, Applied
Ziyun Kan, Ningning Song, Haijun Peng, Biaosong Chen
Summary: JFNK method is a popular approach to solve nonlinear algebraic equations in computational physics. The calculation of Jacobian-vector product through finite difference methods can suffer from errors, but extending CSFD method to JFNK can improve accuracy and stability.
JOURNAL OF COMPUTATIONAL AND APPLIED MATHEMATICS
(2022)
Article
Engineering, Mechanical
Haijun Peng, Ningning Song, Ziyun Kan
Summary: This paper introduces a novel model order reduction strategy for simulating flexible multibody systems based on the idea of data-driven models, known as the symplectic model order reduction. By obtaining snapshot matrices and converting them to symplectic matrices using cotangent lift, as well as conducting a systematic study on model order reduction at both system and component levels, the proposed method is validated to have better numerical accuracy and computational efficiency compared to classic POD-based models.
NONLINEAR DYNAMICS
(2022)
Article
Engineering, Mechanical
Ningning Song, Haijun Peng, Ziyun Kan
Summary: This paper introduces the nonsmooth contact method (NSCM) for flexible multibody systems (FMBSs) and proposes a novel hybrid model order reduction (MOR) strategy based on a data-driven approach to save computational costs. Numerical examples show that the proposed methodology can significantly reduce computing time and maintain a very low level of error compared to the original model.
MECHANISM AND MACHINE THEORY
(2022)
Article
Engineering, Mechanical
Antonella Castellano, Pietro Stano, Umberto Montanaro, Marco Cammalleri, Aldo Sorniotti
Summary: This paper proposes a new control strategy for hybrid electric vehicles, called Model Predictive Control (MPC), and considers the losses in transmission gears. Through a case study on Chevrolet Volt, the results show that the simplified internal model has a minor impact on fuel consumption performance.
MECHANISM AND MACHINE THEORY
(2024)
Article
Engineering, Mechanical
Rui Peng, Gregory S. Chirikjian
Summary: This article introduces a method of designing morphable thick-panel origami structures using reconfigurable linkages, which improves the potential of origami techniques for different tasks and solves the limitations of one-DOF and multiple-DOF folding structures.
MECHANISM AND MACHINE THEORY
(2024)
Article
Engineering, Mechanical
Gaohan Zhu, Weizhong Guo, Yinghui Li, Youcheng Han
Summary: Comprehensive and accurate performance evaluation is crucial for profile synthesis and analysis of higher pair mechanisms. This paper proposes evaluation indices and methods for the transmission performance of planar higher pair mechanisms from different perspectives. It subdivides the transmission performance into element-based performance and joint-based performance and develops novel indices specific to higher pair mechanisms. A graphical mapping method based on element-based performance is also proposed for intuitive analysis. Practical examples validate the effectiveness of the proposed indices and methods for evaluating the performance of higher pair mechanisms.
MECHANISM AND MACHINE THEORY
(2024)
Article
Engineering, Mechanical
Ke Wu, Gang Zheng, Guimin Chen, Shorya Awtar
Summary: Researchers proposed a new modeling method, namely Body-frame Beam Constraint Model (BBCM), to predict and optimize the design of high-precision compliant mechanisms (CMs).
MECHANISM AND MACHINE THEORY
(2024)
Article
Engineering, Mechanical
Youcheng Han, Weizhong Guo, Changjie Zhao, Ziyue Li, Ze Fu, Yinghui Li
Summary: This study proposes a structural synthesis methodology that considers motion, force, and energy characteristics simultaneously to design efficient mechanisms.
MECHANISM AND MACHINE THEORY
(2024)
Article
Engineering, Mechanical
Cristian Enrico Capalbo, Daniel De Gregoriis, Tommaso Tamarozzi, Giuseppe Carbone, Domenico Mundo
Summary: This study proposes a novel flexible multibody formulation that enables efficient updating of models while maintaining small size and high accuracy. Numerical validation demonstrates its wide applicability across various materials and mechanisms, showing promising results in terms of accuracy.
MECHANISM AND MACHINE THEORY
(2024)
Article
Engineering, Mechanical
Weihao Zhao, Junbei Liao, Wei Qian, Haoyong Yu, Zhao Guo
Summary: This paper presents a newly designed compliant actuator using a tensile springs array to address the challenges in achieving linear and consistent elastic properties, low friction, minor hysteresis, and good compliance in series elastic actuators (SEA). The unique geometry of the spring array enables the SEA to have consistent rotary stiffness with minimal friction and hysteresis. The device's performance is evaluated using PID and sliding mode control, demonstrating its constant low rotary stiffness and torque tracking bandwidth, making it suitable for human-robot interaction requirements.
MECHANISM AND MACHINE THEORY
(2024)
Article
Engineering, Mechanical
Mohui Jin, Yukang Luo, Xing Xu, Bowei Xie, Weisheng Wang, Zewei Li, Zhou Yang
Summary: This paper presents a method for evaluating the contact interaction between compliant mechanisms and external objects. By establishing a numerical model and introducing contact springs to describe the contact forces, the deformation and normal contact force/stress can be accurately calculated. The static equilibrium configuration and contact force/stress can be obtained by minimizing the total potential energy function of the system.
MECHANISM AND MACHINE THEORY
(2024)
Article
Engineering, Mechanical
Alejandro G. Gallardo, Martin A. Pucheta
Summary: This paper presents a method for the synthesis of parallel flexure systems using Screw Theory and Linear Algebra. The method is validated through three case studies and offers a simple and precise design with decoupled actuators.
MECHANISM AND MACHINE THEORY
(2024)
Article
Engineering, Mechanical
Xiao Wang, Chenglin Liu, Haoxiang Sun, Hanwen Song
Summary: This paper presents a new decomposition mode for robot-world calibration, which decomposes the Ad(SE(3)) equation using Chasles' motion. A two-step method based on point set matching is proposed. The superiority of this method is verified through simulations and experiments.
MECHANISM AND MACHINE THEORY
(2024)
Article
Engineering, Mechanical
Yanlin Chen, Xianmin Zhang, Yanjiang Huang, Yanbin Wu, Jun Ota
Summary: This study establishes an error model for a 3-RRR+UR spherical parallel mechanism and analyzes the sensitivity of error parameters. A design structure is proposed to reduce input errors based on the analysis. Experimental results show that the multiloop circuit incremental method provides more accurate results.
MECHANISM AND MACHINE THEORY
(2024)
Article
Engineering, Mechanical
Vu Linh Nguyen, Chin-Hsing Kuo, Po Ting Lin
Summary: This paper presents a method for analyzing the performance of gravity-balanced serial robotic manipulators under dynamic loads and uses a three-degree-of-freedom planar serial manipulator as a case study. The significance of this method is demonstrated by evaluating the impact of dynamic loads on gravity-balanced performance and proposing a step-by-step design procedure to improve it.
MECHANISM AND MACHINE THEORY
(2024)
Article
Engineering, Mechanical
Shifeng Rong, Jiange Zhang, Xing Zhang, Keliang Li, Kaibin Rong, Zhenyu Zhou, Han Ding
Summary: This article proposes a data-driven dry cutting tool collaborative optimization model to improve the economic and environmental attributes of facehobbing hypoid gears. An innovative ease-off tooth contact analysis method is introduced to establish accurate relations between ease-off flank and loaded contact performance evaluations. The proposed model significantly improves sustainability in terms of economic and environmental assessments.
MECHANISM AND MACHINE THEORY
(2024)
Article
Engineering, Mechanical
Kemal Eren, Soley Ersoy, Ettore Pennestri
Summary: This research investigates the instantaneous kinematics of the terminal link of a planar two-link open chain using the complex-number technique and higher-order instantaneous invariants.
MECHANISM AND MACHINE THEORY
(2024)
Article
Engineering, Mechanical
Bo Han, Zhantu Yuan, Jiachuan Zhang, Yundou Xu, Jiantao Yao, Yongsheng Zhao
Summary: This paper proposes novel deployable mechanism units with self-limiting position function, and constructs ring truss deployable mechanisms. The degrees of freedom (DOF) of deployable units are analyzed and it is proved that the constructed ring truss deployable mechanisms have only one DOF. The dynamic model of the deployable mechanism unit with passive actuation is established and verified by simulation. The deployable mechanism units proposed in this paper have the advantages of good scalability and stability, and have broad application prospects.
MECHANISM AND MACHINE THEORY
(2024)
