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1、上机作业71．教材P137页例4-8。g1=tf(1,[0.0171]);g2=tf(13.3,[10]);g12=feedback(g1*g2,1);g3=tf(44,[0.00171]),g4=5.2,g=g12*g3*g4;kp=[1:1:5],fori=1:length(kp)gc=feedback(kp(i)*g,0.01178),step(gc),holdonendaxis([0,0.2,0,130]);gtext('kp=1'),gtext('kp=2'),gtext('kp=3'),gtext('kp=4'),gtext('kp=5'),g1
2、=tf(1,[0.0171]);g2=tf(13.3,[10]);g12=feedback(g1*g2,1);g3=tf(44,[0.00171]),g4=5.2,g=g12*g3*g4;kp=1,ti=[0.03:0.01:0.07]fori=1:length(ti)gc=tf(kp*[ti(i)1],[ti(i)0]),gb=feedback(gc*g,0.01178),step(gb),holdonendaxis([0,0.2,0,130]);gtext('ti=0.03'),gtext('ti=0.04'),gtext('ti=0.05'),gtex
3、t('ti=0.06'),gtext('ti=0.07'),g1=tf(1,[0.0171]);g2=tf(13.3,[10]);g12=feedback(g1*g2,1);g3=tf(44,[0.00171])，g4=5.2,g=g12*g3*g4;kp=0.01,ti=0.01;td=[12:36:84]fori=1:length(td)gc=tf(kp*[ti*td(i)ti1],[ti0]),gb=feedback(gc*g,0.01178),step(gb),holdonendaxis([0,0.2,0,130]);gtext('td=12'),g
4、text('td=48'),gtext('td=84'),1．教材P140页例4-9。n0=180;d0=conv(conv([10],[0.21]),[0.51]);g0=tf(n0,d0),rlocus(g0)n0=180;d0=conv(conv([10],[0.21]),[0.51]);g0=tf(n0,d0)gc=tf([0.0060.0240.024],[10]),g=feedback(g0*gc,1);step(g)1．教材P142页例4-10。g1=tf(8,[3601]);[np,dp]=pade(180,2);gp=tf(np,dp);g
5、0=feedback(g1*gp,1),step(g0)g1=tf(8,[3601]);[np,dp]=pade(180,2);gp=tf(np,dp);gc=tf([270.30.00076],[10]),g0=feedback(g1*gp*gc,1),step(g0)1．教材P143页例4-11。g1=tf(8,[3601]);[np,dp]=pade(180,2);gp=tf(np,dp);gc=tf(0.37*[60.510.0023],[10]),g0=feedback(g1*gp*gc,1),step(g0)
