基于PLC的微分先行控制及抗干扰研究

The differential control and Anti-interference research based on PLC

工业级信号采集及追踪装置对工业测控具有重要意义。利用PLC运算控制与外设多扩展能力,结合先进的微分先行PID控制算法,对信号的输出值进行微分并离散化,以使被控量产生较缓和的变化,从而在一定程度上适应信号的频繁升降,并抑制干扰信号,改善系统动态特性。通过方波和阶跃信号模拟追踪实验得出追踪曲线过度平滑,较好地抑制了干扰信号,较普通PID控制算法性能更加优良。

Industrial-grade signal acquisition and tracking devices are of great significance for industrial measurement and control.Using PLC operation control and peripheral expansion capability,combined with advanced differential prior PID control algorithm,the output value of the signal is differentiated and discretized to control the amount a gentler change,so as to adapt to the frequent rise and fall of the signal to a certain extent,and suppress the interference signal to improve the dynamic characteristics of the system.Through the square wave and step signal simulation tracking experiments,the tracking curve is excessively smooth,and the interference signal is better suppressed,which is better than the ordinary PID control algorithm.