fig5_55.m

包含了控制理论的各种仿真程序

% Fig. 5.55  Feedback Control of Dynamic Systems, 4e 
%             Franklin, Powell, Emami
% script to generate figure 5.55
% using the general simulation nonlin
clf;
N=1;
a=2;
r=0;
num=[1 2 1];
den=[1 0 0 0];
nf=1;
df=1;
for k=1:3
   r=r+1;
   sim('nonsim',20)
   hold on
   plot(yn(:,1),yn(:,2))
end
grid on
r=3.475;
sim('nonsim',20)
plot(yn(:,1),yn(:,2))
xlabel('Time (sec)');
ylabel('Amplitude');
Title('Figure 5.55 Simulation of a conditionally stable system')
gtext('r=1')
gtext('r=2')
gtext('r=3')
gtext('r=3.475')