增量式数字PID参数整定的频域分析

Frequency domain analysis of incremental digital PID parameter tuning

增量式数字PID是自动控制系统优化过程中应用广泛的一种控制方法。分析了增量式PID参数调节对控制器性能以及系统环路性能的影响。MATLAB频域仿真结果表明,Kp、Kd、Ki值的改变直接造成PID控制器零点的位置发生移动,从而使得控制系统动态性能得到改善。

Incremental digital propotional-integral-derivative（PID）controller is commonly used in optimization of automatic control system. The influence of incremental PID parameter tuning for controller and closed-loop system is analysed. Based on the characteristic frequency of the PID controller and the corresponding simulation results, the zeros of system will moved by the change of PID parameters, and the system will have better dynamic character.