内容简介作者简介 - 科学与工程计算系

%
global a ss
a=aa;
Tspan=evalin('base','Tspan'); %
opts=simset('RelTol',0.0001); %
[tt,x,s]=sim('smodel',Tspan,opts); %
ss=s(end); %
[exm080652_1.m]
[exm080652_1.m]
%exm08652_1.m
clear
global a ss
a0=[3.3 6.6 8.6 7.5 3.9];
Tspan=(0:500)/10;
options=optimset('LargeScale','off');
a=fminunc(@itae,a0,options);
coeff=[1,a,1]
ss
(4)
exm080652_1
coeff =
1.0000 2.1526 5.6292 6.9349 6.7927 3.7399 1.0000
ss =
8.3338
(5)
old=tf(1,[1 3.25 6.60 8.60 7.45 3.95 1]);
new=tf(1,coeff);
[yold,told]=step(old,50);
[ynew,tnew]=step(new,50);
plot(told,yold,'b','LineWidth',1)
axis([3,18,0.95,1.05])
hold on,plot(tnew,ynew,'r','LineWidth',3),hold off
legend('Old','New',4),grid on
1.05
1.04
1.03
1.02
1.01
1
0.99
0.98
0.97
0.96
0.95
4 6 8 10 12 14 16 18
图 8.6.5.2-1-1
表 8.6.5.2-1 ITAE(单点)标准型新系数(黑体)和相应老“经典”系数对照
阶次 ITAE 值 传递函数分母多项式系数
2 1.99
1 1.4 1
1.952
1 1.5 1
29
Old
New