机电-刚柔耦合特性作用下线性进给系统动力学分析  

Dynamic Modeling of a Linear Feed Axis Considering the Characteristics of the Electro-mechanical and Rigid-flexible Coupling

作　　者：李杰[1] 谢福贵[1] 刘辛军[1,2] 刘大炜 李福华[2] 姜忠[4] 

机构地区：[1]清华大学机械工程系,北京100084 [2]清华大学精密超精密制造装备及控制北京市重点实验室,北京100084 [3]成都飞机工业(集团)有限责任公司,成都610092 [4]电子科技大学机械电子工程学院,成都611731

出　　处：《机械工程学报》2017年第17期60-69,共10页Journal of Mechanical Engineering

基　　金：国家科技重大专项资助项目(2013ZX04001-021)

摘　　要：动力学特性是影响进给系统动态误差的关键因素。机电-刚柔耦合特性作用下动态误差的产生机理尚未得到系统性阐述,这使得进给系统动力学优化和动态误差抑制研究依然存在一定盲区。考虑线性进给系统的集中柔性和分布柔性特征,构建了进给系统的机电-刚柔耦合动力学模型,通过数值仿真讨论了进给系统对阶跃信号和正弦信号的响应特性,分析了线性进给系统动态误差的产生过程及各类因素对动态误差的影响规律。所构建的机电-刚柔耦合动力学模型能够系统性地阐述动态误差的产生过程,可为直线进给系统动力学优化设计以及动态误差抑制研究奠定理论基础。The dynamic performance is a key factor that influences the dynamic accuracy of a feed axis servo system. The mechanism of dynamic errors with the electro-mechanical and rigid-flexible coupling characteristics has not been revealed. It leads to a blind region for the research on the dynamic optimal design and dynamic errors suppression of a feed axis servo system. Considering the concentrated and distributed flexibility of the structure, the dynamic model of a feed axis servo system is established based on the electro-mechanical and rigid-flexible coupling characteristics. According to analyzing the response of the dynamic model to step and sine signals in simulation, how the dynamic errors are produced is discussed and the influence of important factors on the dynamic errors is analyzed. The proposed dynamic model can systematically illustrated the formation of dynamic error, which lays a theoretical foundation for the dynamic optimal design and dynamic error suppression of the feed axis servo system.

关 键 词：进给轴 机电耦合 刚柔耦合 动力学特性 三环控制 

分 类 号：TG659[金属学及工艺—金属切削加工及机床]