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lei-liu

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function dx= examplefun(t,x);
  x0=[1;0;-0.25;0;0;0;0;];
  [t,x]=ode45(@examplefun,[0:0.01:10],x0);
%%%%%%Éè¼Æ
theta=0.5; r=0.1;phi=0.1;
  c=1;h2=0.5;
  h1=1;
  %%%%%%%ÆÚÍûÊä³ö
  yr=0.5*sin(t);
  dyr=0.5*cos(t);
  ddyr=-0.5*sin(t);
%%%%%%%%%%%%%%%%%%%
%%%%%%%%%%¸ú×ÙÎó²î
  z1=x(1)-yr;
  z2=x(2)-dyr-eta1;
%%%%%%%%%%%%%%%%%%
  eta=-h1*z1;
  v=x(3)*((-h2*z2-z1)-(z2*x(4)^2*((x(1))^2)/(abs(z(2))*x(4)*((x(1))^2)+epsilon))-sign(z2)*x(5)+ddyr+deta);
  w=c*v;  

  dx=[x(2);     %%ϵͳ·½³Ì
   x(1)^2+w;    %%ϵͳ·½³Ì
  -phi*(x(3)+w*z2);  %%×ÔÊÊÓ¦
  -r*x(4)+r*abs(z2)*((x(1))^2);    %%×ÔÊÊÓ¦
   -theta*x(5)+theta*abs(z2);];    %%×ÔÊÊÓ¦
plot(t,x(1),'-k',t,yr,'--k');xlabel('Time(sec)');ylabel('Tracking error');
figure;
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lei-liu

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