网络控制系统的模糊PID控制仿真研究

Study of Simulation of Fuzzy PID Control on NCS

通过网络控制系统(NCS)结构的介绍,利用Truetime进行NCS仿真,分析网络延时、数据包丢失和传输速率几个主要因素对网络控制系统控制性能的影响.针对网络控制系统的延时特性,设计模糊PID控制器,利用模糊推理的方法在线整定PID的参数,以实时性要求较高的直流电机为被控对象,利用Truetime工具箱在MATLAB平台上进行控制系统的仿真.最后,与常规的PID控制进行对比可知,该算法的控制效果更好.

The paper introduces the structure of Network Control System and gives the simulation of NCS by using Truetime.It analyses the effects of some important factors such as network time delay,the loss of packets and data rate on the control performance of NCS.Focusing on the delay of the Network Control System,a fuzzy PID controller is designed.By using fuzzy reasoning solution to adjust the PID number,this paper chooses the DC machine which has higher performances in real-time characters as a control object to make a simulation of control system in the MATLAB platform by using the Truetime toolbox.At last,it gives a comparison with the conventional PID control to affirm that this solution is more effective.