摘要
数控机床工作台在运行时其承载的工件质量往往不同且变化范围大,工件质量的变化会对其直线电机伺服系统的性能造成较大影响。分析数控机床工作台直线电机伺服系统在带动不同质量工件的情况下所产生的超调量和调整时间,发现系统超调量随工件质量的增加成单调增的关系;在工件质量一定的情况下采用非线性PID控制来抑制超调量,缩短调整时间,找到非线性PID控制的参数Kd与工件质量之间的对应关系,并进行线性拟合,对非线性PID控制的参数进行调整,使在不同工件质量的情况下均能达到较好的响应性能。
The workpiece quality that the CNC machine table hold at runtime is often different and changes in range. The workpiece quality change has great impact on the performance of the linear motor servo system. The CNC machine table linear motor servo system overshoot and adjustment time in case it drove workpieces with different quality were analyzed. The relationship between the system overshoot and the workpiece quality was found out. Nonlinear PID control was used to suppress overshoot in the case of a certain quality of the workpiece. And the adjustment time was cut down. the The corresponding relationship between the nonlinear PID control parameter Kd and workpiece quality was found out. With linear fit,nonlinear PID control parameters could be adjusted. So better response performance can be achieved in different workpiece quality.
出处
《机床与液压》
北大核心
2014年第10期6-11,共6页
Machine Tool & Hydraulics
