基于LQ最优控制的PWM整流器参数整定

LQ Based Controller Tuning of PWM Rectifier

针对传统PID调节器参数整定方法的不足,基于线性二次型最优控制理论,由跟踪问题得出状态反馈增益阵与PID调节器参数之间的关系,并将此结论应用于PWM整流器电压外环调节器的参数整定中。对加权矩阵Q和正常数R进行适当的选取,实现了PWM整流器的参数最优化。使用MATLAB/Simulink进行了仿真分析,验证了参数优化的可行性,并通过dSPACE实时系统对控制策略进行了实验验证,实验结果验证了该方法的有效性。

Based on the theory of Linear Quadratic Optimum Control,aimed at shortage of the PID regulator＇s parameter tuning,this paper get the relationship between the state feedback gain matrix and the PID regulator for the tracking problem.This method is applied for parameters tuning of the external voltage-loops of PWM converter.Through select the weighted matrix and the positive constant,parameters optimization of the PWM converter is realized.Simulations and analysis is carried out in MATLAB/Simulink.Results show that the design method is rationality.The experiments were taken with the platform of dSPACE hardware real-time system.The experiments results show the validity of the method.