摘要
进给伺服系统是数控机床的重要组成部分,但常规的PID控制器具有整定不良、性能欠佳和适应性差等缺点,不能满足实际加工的精度要求。对某型号数控铣床进给伺服系统常规PID控制器存在的问题进行分析,提出了加入全闭环控制和支持向量机PID控制系统的方法。通过补偿运动部件位移产生的误差,并将各传感器测量值反馈支持向量机PID控制系统,对PID控制参数进行自整定。通过仿真实验证实了该方法缩短了系统的调节时间,提高了系统抗干扰能力和适应力。
Feed servo system is an important part of cnc machine,and the conventional PID controller w ith setting bad,poor performance and adaptability,cannot satisfy the requirement of the actual processing precision. Analysis the problems of the existing conventional PID controller for a certain type of CNC milling machine feed servo system,put forw ard the method of adding the full closed loop control and support vector machine PID control system. By compensating the error of the displacement of the moving parts,and feedback the sensor measurements to support vector machine( SVM) PID control systems,self-tuning PID control parameters. Through the simulation experiments prove that the method can shorten the adjustment time of system,improve the system of anti-interference ability and adaptability.
出处
《组合机床与自动化加工技术》
北大核心
2015年第6期65-67,共3页
Modular Machine Tool & Automatic Manufacturing Technique
基金
国家自然科学基金(51365009)
广西制造系统与先进制造技术重点实验室主任课题(13-051-09-009Z)
作者简介
张蕾(1987-),男,广西玉林人,桂林电子科技大学硕士研究生,研究方向为数控机床误差补偿,(E—mail)118052439@qq.com。