直线滚动导轨结合部动力学特性测试及参数识别

基于辨识原理,提出了导轨结合部动力学参数的试验辨识流程,包括标记测量点、频响函数测试、测试数据处理、编制辨识程序等步骤.以组装在床身上的THK导轨结合部为对象,进行了动力学特性测试.并应用Matlab编制了辨识算法,识别出导轨结合部系统法向方向的质量矩阵、刚度矩阵、黏性阻尼矩阵和结构阻尼矩阵,证明了动刚度矩阵法辨识导轨结合部动力学参数的有效性.

Dynamics Characteristics Testing and Parameter Identification for Joints of Linear Rolling Guideway

Based on identification theory,an experiment identification flow for guideway joint dynamics characteristics is proposed,including marking test points,testing frequency response functions(FRF),dealing with test data,and programming identification algorithms.Dynamics testing and parameter identification was conducted on a THK guideway joint that had been assembled in the bed.Using the Matlab open source identification algorithm,dynamics characteristics for a normal direction were obtained,including mass matrix,stiffness matrix,viscosity damping matrix,and structural damping matrix.Validity of identifying guideway joint characteristics was verified.