数控工作台动态特性的混沌特征  

Chaotic Characteristic Analysis on Dynamic Properties of NC Table

作　　者：王林鸿[1,2] 吴波[1] 杜润生[1] 杨叔子[1] 

机构地区：[1]华中科技大学,武汉430074 [2]南阳理工学院,南阳473004

出　　处：《中国机械工程》2009年第14期1656-1659,共4页China Mechanical Engineering

基　　金：国家重点基础研究发展计划资助项目(2005CB724101)

摘　　要：用混沌理论中的相空间重构、关联维数和最大李雅普诺夫指数等理论与方法,对观测到的数控工作台的动态时间序列信号进行分析,求出其功率谱、相平面轨迹、关联维数和最大李雅普诺夫指数等特征量,多方位揭示数控工作台的混沌特征,断定数控工作台是一个非线性动力学系统,为数控机床动态系统辨识提供依据。By means of the theory and method on phase- space reconstruction, correlation dimension and maximum Lyapunov exponent from chaos theory, dynamic time series measured from NC table were analyzed. The characteristic quantities as power spectrum, phase trajectories, correlation dimension and maximum Lyapunov exponent etc. were extracted. The chaotic characteristic of dynamic properties of NC table was revealed with several approaches. The conclusion that NC table is a nonlinear dynamic system can be drawn. This research represents basis for the dynamic system identification of CNC machine.

关 键 词：数控工作台 混沌特征 相空间重构 关联维数 最大李雅普诺夫指数 

分 类 号：TH113.1[机械工程—机械设计及理论]