基于改进磷虾群预测PID的电缆线径控制

Cable wire diameter control based on improved krill herd prediction PID

针对线径控制系统中存在时滞与扰动导致建模困难和控制精度低等问题,传统PID控制方式具有一定的局限性,在此基础上提出一种基于动态矩阵控制(DMC)和改进磷虾群(IKH)算法对控制系统进行优化的策略。首先DMC算法根据输入输出建立预测模型,预测调整输入量,IKH利用其输入量优化PID参数,最终得到逼近期望的线径值。通过MATLAB软件进行仿真,结合传统PID控制算法和原磷虾群(KH)优化PID控制算法的阶跃响应与抑制扰动能力进行对比。结果表明:带预测控制的IKH的PID算法具有超调量小、响应速度快以及抗干扰强等优点,具有一定的实际应用价值。

Aiming at the problems of time-delay and disturbance in wire diameter control system that lead to modeling difficulties and low control precision,the traditional PID control method has limitations.On this basis,a dynamic matrix control(DMC)and improved krill herd(IKH)algorithm are proposed.Strategy to optimize the control system.Firstly,the DMC algorithm establishes a prediction model based on the input and output,predicts and adjusts the input volume,and IKH uses its input volume to optimize the PID parameters,and finally obtains the desired line diameter value.Simulated by MATLAB software,combined with the traditional PID control algorithm and the original krill herd optimization PID control algorithm,the step response and the ability to suppress disturbance are compared.The results show that the improved krill herd PID algorithm with predictive control has the advantages of small overshoot,fast response and strong anti-interference,and has certain practical application value.