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📄 wang1.m

📁 一些关于系统辩士的matlab程序
💻 M
📖 第 1 页 / 共 2 页
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t=[0:0.1:60];
N=length(y);
for i=1:4
clear ftk ;clear f;
for k=i+1:N
f(:,k)=[-y((k-1):-1:(k-i));u((k-1):-1:(k-i))];
end
ftk=f';
clear F;clear Y;
 for k=i+1:N
F(k-1,:)=[ftk(k,:)];
Y(k-1,:)=[y(k)];
end
clear q1;clear q;
q1=inv(F'*F)*F';
q=q1*Y;
J(i)=0;
for k=i+1:N
 J(i)=J(i)+(y(k)-ftk(k,:)*q)^2;
 J(i)=J(i)/N;
end
Ym=ftk*q;
% figure(i)
 subplot(2,2,i)
plot(t,y,'m',t,Ym,'g')
grid on
axis([0 60 -5 +5])
hold on
%title('compare the real output with the model output')
hold on
subplot(2,2,i)
e=y-Ym
plot(t,e,'c')
grid on
title('error of the real output with the model output&compare the real output with the model output')
end



 


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