精密机床折返过程齿隙及摩擦补偿方法研究  

Research on Backlash and Friction Compensation for Precision Machine Tools during Reversal

作　　者：张大兴[1] 贾建援[1] 郭永献[1] 

机构地区：[1]西安电子科技大学,西安710071

出　　处：《中国机械工程》2008年第7期769-772,共4页China Mechanical Engineering

基　　金：国家自然科学基金资助项目(10476019)

摘　　要：针对齿隙、摩擦等非线性因素对运动控制精度的影响,考虑精密机床加工过程不允许出现超调量的特殊要求,研究了机床折返时驱动轴与负载轴分离的不可控过程。建立了系统动力学变结构模型,采用自适应变结构控制方法,能够根据系统运行状态自适应改变滑动方程参数,该控制方法既能补偿齿隙、摩擦的不利影响,保证加工精度,又可满足折返时的快速性和没有超调量的特殊要求。仿真结果验证了该方法的可行性。Backlash and friction have profoundly influence on the performance of speed and position control system. The disengaged process of driving axle and bearing axle was investigated, and the demands without overshoot during reversal of high precision machine tool were considered. The dynamics model was established based on the technique of adaptive variable structure control. The parameters of sliding mode can be variable due to the running state, which can compensate the influence of backlash and friction, and satisfy the demand of high precision, rapidity and non overshoot. The feasibility of this method was validated by simulation results.

关 键 词：齿隙 摩擦 补偿 自适应 变结构控制 

分 类 号：TP273[自动化与计算机技术—检测技术与自动化装置]