p.asv

PID性能分析

clear all
G0=tf(1,[1,3,3,1]);Ti=[0.6:0.2:1.4];
Kp=1;


for i=1:length(Ti)
    Gc=tf(Kp*[1,1/Ti(i)],[1,0]);
    G=feedback(Gc*G0,1);hold on;
    step(G);grid on;
    axis([0,20,-0.5,2.5]);
end