【摘要】 针对开关磁阻电机的非线性、时变和强耦合性,提出了模糊自整定PID的调速控制策略。在分析SR电机非线性数学模型的基础上,将速度偏差和偏差变化率作为控制器输入,PID的三个控制参数为输出,利用模糊规则对PID参数进行在线修改,实现PID参数的自动最佳调整。通过将MATLAB中的Fuzzy Toolbox和SIMULINK有机结合,实现了基于模糊自整定PID控制器的开关磁阻电机调速系统仿真,并进行了传统PID控制与模糊自整定PID控制的仿真比较。结果表明:模糊自整定PID控制器能够明显改善系统的调速性能,具有较强的鲁棒性,并且计算量少,易于实现,便于工程应用。更多还原

【Abstract】 In view of the severe nonlinearity,time-varying and strong coupling of SRM,a fuzzy self-tuning PID control strategy is proposed.Based on the nonlinear mathematical model of the switched reluctance motor(SRM),the inputs required by the controller are both the speed error and the error change rate,and the three parameters of PID control are taken as outputs.Thus the on-line automatic adjustment of the PID parameters is realized.The simulation of this fuzzy self-adapting PID timing system is realized conveniently by the organic combination of fuzzy toolbox and SIMULINK.Simulation results show that this controller can improve the timing property of system evidently and possesses good robustness,apart from those,it is a method of utility and efficiency.更多还原