基于全局动力学性能的并联机床结构参数优化  

A Dynamics Optimization Method for Determining Structure Parameters of Parallel Machine Tools

作　　者：郭祖华[1] 陈五一[1] 陈鼎昌[1] 

机构地区：[1]北京航空航天大学宇航学院

出　　处：《中国机械工程》2003年第10期861-864,共4页China Mechanical Engineering

基　　金：国家自然科学基金资助项目 ( 5 9875 0 0 4) ;航空科学基金资助项目 ( 99H5 112 4)

摘　　要：提出了一种以并联机床动力学模型为基础的结构参数的优化方法。以 6- UPS型并联平台机构支链为研究对象进行了运动学分析 ,给出了机构支链的运动学方程和速度加速度映射公式 ,以运动学为基础叙述了该机构动力学建模过程 ,建立基于全局指标结构参数优化模型 ,并对 6- UPS型并联机床进行了优化计算。为检验结果的正确性 ,采用仿真机构运动的方法对优化结果进行了验证。In the paper a dynamics based optimization method was proposed for determining structure parameters of parallel machine tools. Firstly, authors analyzed the kinematics of a single chain of 6-UPS type parallel mechanism. Kinematics equation, velocity reflection formula and acceleration reflection formula were deduced. Secondly, a dynamics model of parallel machine tools was made on the basis of kinematics analysis. At last, a structure parameter optimization model with global goal was built and the optimal structure parameters of 6-UPS type machine tools were obtained. In order to confirm the results, a simulation process to show force changing of legs of parallel machine tools when the platform motion was done.

关 键 词：并联机床 运动学 动力学 优化 

分 类 号：TH113[机械工程—机械设计及理论] TP241[自动化与计算机技术—检测技术与自动化装置]