数控机床进给伺服系统模糊自适应PID仿真

摘要

Since traditional PID control strategy can not meet the control requirements of the NCfeed servo system,a fuzzy adaptive PID controller is designed based on the traditional PID control combin-ing fuzzy control theory.By applying Fuzzy control theory, PID parameters are changed in real-time,whichmake the system with better adaptive ability and robustness.Meanwhile dynamic simulation for the feedservo system is done under the MATLAB,which results show that the performance of this adaptive fuzzyPID controller is much better than the conventional PID controller,even in the external disturbance andsystem conditions change with characteristics of fast response and good robustness.%针对传统的PID控制策略不能满足数控进给伺服系统的对控制性能要求.结合模糊控制理论,在传统PID控制基础上设计出一种基于模糊决策的模糊自适应PID控制器.运用模糊控制理论,对PID参数进行实时修改,使系统具有较好的自适应能力和较强的鲁棒性.在MATLAB环境下对进给伺服系统进行了动态仿真；仿真结果表明,模糊自适应PID控制器的控制性能远优于常规PID控制器,即使在外界干扰和系统工况发生变化时,此控制器也具有很好的快速响应特性和较强的鲁棒性.