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%λÖøú×ÙÎÊÌâ clear all clc %ÉèÖòÎÊý alfa=500 beta=10 c=30 %³õʼ״̬ xx=[0 0] k=0 for ti=0:0.1:20 k=k+1 s=1 if s==1 rin=1 drin=0 ddrin=0 elseif s==2 rin=0.5*sin(6*pi*ti) drin=3*pi*cos(6*pi*ti) ddrin=-18*pi*pi*sin(6*pi*ti) end %ϵͳ״̬·½³ÌÖвÎÊýÉèÖà a=25+5*sin(6*pi*ti) b=133+50*sin(2*pi*ti) A=[0 1;0 -a] B=[0;b] e1(k)=rin-xx(1) e2(k)=drin-xx(2) s(k)=c*e1(k)+e2(k) u=(alfa*abs(e1(k))+beta*abs(e2(k)))*sign(s(k)) %ϵͳ״̬·½³Ì dx(1)=xx(2) dx(2)=-a*xx(2)+b*u %¶¨Òåϵͳ״̬Îó²î e1(k)=rin-xx(1) e2(k)=drin-xx(2) %ϵͳ±Õ»··½³Ì de1=e2 e1=e1+0.1*de1 de2=ddrin-dx(2) e2=e2+0.1*de2 x1(k+1)=xx(1) x2(k+1)=xx(2) end figure(1) plot(ti,e1,'r') axis([0 20 -2 2]) ÉÏÊö³ÌÐòÔËÐкóÎÞ´íÎ󱨾¯µ«Ã»ÓÐͼ³öÏÖ£¬Çë¸ßÊÖ½²½â£¬½ð±ÒÖØÐ» |
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lele_719
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