Research on Nonlinear PID Position Controller of CNC System

摘要：

The position control arithmetic is crucial to the rapidity, stability and accuracy of CNC system. When adopting conventional PID position controller, the CNC system is difficult to obtain rapid response and satisfied overshoot at the same time because of the PID control coefficient invariance. A nonlinear PID position controller model is developed to achieve flexible control on CNC system in the paper, where the integral controlled quantity U I expression and differential control efficient K d are adjusted automatically along with the tracking error variation on the basis of analyzing the drawback of the conventional PID position controller in detail. The control simulation aimed at the typical step input signal shows that the developed nonlinear PID position controller can reduce the overshoot to zero, get rapid response and enhance the tracking performance of the CNC system in the meantime. The conclusion is significant to high speed and high accuracy CNC machining.

关键词： CNC system Position controller Nonlinear PID Overshoot

作者: Guoyong Zhao Yugang Zhao Aimei Dong Lili Zhang

作者单位: Department of mechanical Engineering Shandong University of Technology Zibo,Shandong Province,China School of Light Industry & Agriculture Engineering Shandong University of Technology Zibo,Shandong P

会议类型: 国际会议

会议名称: 2007 IEEE International Conference on Automation and Lofistics

会议地点: 山东济南

会议语种:英文

在线出版日期: 2007-08-18（万方平台首次上网日期，不代表论文的发表时间）