基于FUZZY-PID直流调速系统的仿真与分析

Analysis and Simulation of DC Motor Control System Based on Fuzzy-PID Control

针对常规PID在直流调速系统中控制参数难以整定等问题,在对直流调速系统建模的基础上,以偏差e和偏差变化率ec作为输入,找出常规PID的三个参数与e和ec之间的模糊关系,在运行中通过检测e和ec,根据模糊推理原理来对三个参数在线修改,从而满足不同时刻的e和ec对PID参数自整定的要求,以此设计了一种基于模糊控制原理的PID控制器,并对采用FUZZY-PID控制的直流调速系统的动态过程进行仿真分析。仿真结果表明:采用FUZZY-PID控制策略的直流调速系统响应快、超调较小、鲁棒性强,较传统PID控制具有更好的动、静态特性,这说明了这种控制策略的正确性和有效性。

It is difficult to define the control parameter in DC motor control system by using the routine PID controller. So the paper designs an adaptive PID controller based on fuzzy principle according to the system model. The error e and error rate ec are applied to FUZZY - PID controller as inputs to identify the fuzzy relationship between the three conventional PID parameters and e, ec. And through ongoing testing e and ec, three parameters can be changed according to the principle of fuzzy reasoning to meet the requirement of defining the PID control parameters at different moments. And the system is simulated based on Simulink. The analysis and simulation results indicate that the adaptive PID controller method is superior to the routine PID controller in that the former works well with high dynamic and static performance because of its quick response and good robustness. The experimental results show that the method is correct and efficient.