Automatic control of MATLAB - Nystu

gaoxiao

Automatic control of MATLAB - Nystu [Copy link]

Nyquist curve Haha! You know it is used to judge stability!

gaoxiao

num=[1]
den=[2 3 1 0]
w1=0.1:0.1:10
w2=10:2:100
w3=100:5:1000
w=[w1,w2,w3]
[Re,Im]=nyquist(num,den,w)
plot(Re(:,:),Im(:,: ),Re(:,:),-Im(:,:))
v=[-2 1 -3 3]
axis(v)
grid onnum=[1]
den=[2 3 1 0]
w1=0.1:0.1:10
w2=10:2:100
w3=100:5:1000
w=[w1,w2,w3]
[Re,Im]=nyquist(num,den,w)
plot(Re(:,:),Im(:,: ),Re(:,:),-Im(:,:))
v=[-2 1 -3 3]
axis(v)
grid onnum=[1]
den=[2 3 1 0]
w1=0.1:0.1:10
w2=10:2:100
w3=100:5:1000
w=[w1,w2,w3]
[Re,Im]=nyquist(num,den,w)
plot(Re(:,:),Im(:,: ),Re(:,:),-Im(:,:))
v=[-2 1 -3 3]
axis(v)
grid on

[ 本帖最后由 gaoxiao 于 2009-6-15 09:17 编辑 ]

gaoxiao

gaoxiao

num=[1] den=[2 3 1 0] nyquist(num,den) v=[-1 1.5 -1.5 1.5] axis(v) grid on

gaoxiao

gaoxiao

I don't have time to explain it now, if you have any questions, please feel free to communicate with me!

leizi

have a look，thanks！！！:handshake

gaoxiao

My face was stained just now, haha, it’s fine now!

gaoxiao

If you don't want to set the frequency yourself, just do it like on the fourth floor!!!