lead4.m

《MATLAB在控制系统中的应用》实例程序

function [ngc,dgc]=lead4(ng0,dg0,KK,Pm,w)
[mu,pu]=bode(KK*ng0,dg0,w);[gm,pm,wcg,wcp]=margin(mu,pu,w);
alf=ceil(Pm-pm+5);phi=(alf)*pi/180;
a=(1+sin(phi))/(1-sin(phi)),dbmu=20*log10(mu);mm=-10*log10(a);
wgc=spline(dbmu,w,mm), T=1/(wgc*sqrt(a)),
ngc=[a*T,1];gc=[T,1];