Stifness modeling and analysis of a novel 4-DOF PKM for manufacturing large components

作     者：Li Yonggang Zhang Erjiang Song Yimin Feng Zhiyou 

作者机构：School of Mechanical Engineering Tianjin University of Technology and Education School of Mechanical EngineeringTianjin University School of Electromechanical Engineering Tianjin Polytechnic University 

出 版 物：《Chinese Journal of Aeronautics》 (中国航空学报（英文版）)

年 卷 期：2013年第26卷第6期

页      面：1577-1585页

核心收录：

学科分类：08[工学] 0802[工学-机械工程] 080201[工学-机械制造及其自动化] 

基　　金：supported by the National Natural Science Foundation of China (Nos.51075295 and 51005164) Tianjin Research Program of Application Foundation and Advanced Technology (No.11JCYBJC05600) 

主　　题：Manufacturing Parallel kinematic machine Stiffness Semi analytical method Finite element analysis 

摘      要：Faster response to orientation varying is one of the outstanding abilities of a parallel kinematic machine（PKM）.It enables such a system to act as a reconfgurable module employed to machine large components *** stiffness formulation and analysis are the beforehand key tasks for its parameters design.A novel PKM with four degrees of freedom（DOFs）is proposed in this *** topology behind it is 2PUS-2PRS parallel *** semianalytical stiffness model is frstly obtained,where the generalized Jacobian matrix of 2PUS-2PRS is formulated with the help of the screw theory and the stiffness coeffcients of complicated components are estimated by integrating fnite element analysis and numerical *** the help of the model,it is predicted that the property of system stiffness distributes within the given workspace,which features symmetry about a certain plane and is also verifed by performing fnite element analysis of the virtual ***,key parameters affecting the system stiffness are identifed through sensitivity *** provide insights for further optimization design of this PKM.