![](https://www.mathworks.com/matlabcentral/answers/uploaded_files/970565/image.png)
Can anyone able to get me the step response from this code. I am trying to modify the initial response to step but unable to do so?
3 views (last 30 days)
Show older comments
Tenzing Thiley
on 20 Apr 2022
Commented: Mathieu NOE
on 20 Apr 2022
A = [ -0.040493 9.8689 0 -9.81;
-0.0021967 -0.030908 1 0;
-0.013639 -0.015207 -0.42801 0;
0 0 1 0];
B = [3.2952 0 0 0;0 -0.0020488 -0.068204 0]';
C = [1 0 0 1];
D = 0;
K = [0.021937 2.93 0.24659 -2.9163; 2.5565 1.3199 1.4874 -3.9318];
Ke = [-0.80034 0.82799 -0.34548 0.76847]';
AA = [A-B*K B*K; zeros(4,4) A-Ke*C];
BB = [B;0 0;0 0;0 0;0 0]
CC = [C 0 0 0 0];
sys = ss(AA, eye(8), eye(8), eye(8));
t = 0:0.01:120;
x = initial(sys, [1;0;1;0; 0 ;0 ;0 ;0],t);
x1 = [1 0 0 0 0 0 0 0]*x';
x2 = [0 1 0 0 0 0 0 0]*x';
x3 = [0 0 1 0 0 0 0 0]*x';
x4 = [0 0 0 1 0 0 0 0]*x';
subplot(2,2,1); plot(t,x1); grid
xlabel('t (sec)'); ylabel('∆V')
subplot(2,2,2); plot(t,x2); grid
xlabel('t (sec)'); ylabel('∆α')
subplot(2,2,3); plot(t,x3); grid
xlabel('t (sec)'); ylabel('∆q')
subplot(2,2,4); plot(t,x4); grid
xlabel('t (sec)'); ylabel('∆θ')
4 Comments
Mathieu NOE
on 20 Apr 2022
A = [ -0.040493 9.8689 0 -9.81;
-0.0021967 -0.030908 1 0;
-0.013639 -0.015207 -0.42801 0;
0 0 1 0];
B = [3.2952 0 0 0;0 -0.0020488 -0.068204 0]';
C = [1 0 0 1];
D = 0;
K = [0.021937 2.93 0.24659 -2.9163; 2.5565 1.3199 1.4874 -3.9318];
Ke = [-0.80034 0.82799 -0.34548 0.76847]';
AA = [A-B*K B*K; zeros(4,4) A-Ke*C];
BB = [B;0 0;0 0;0 0;0 0]
CC = [C 0 0 0 0];
sys = ss(AA, eye(8), eye(8), eye(8));
t = 0:0.01:120;
% x = initial(sys, [1;0;1;0; 0 ;0 ;0 ;0],t);
opt = stepDataOptions('StepAmplitude',0.1);
x = step(sys,t,opt);
subplot(2,2,1); plot(t,x(:,1)); grid
xlabel('t (sec)'); ylabel('∆V')
subplot(2,2,2); plot(t,x(:,2)); grid
xlabel('t (sec)'); ylabel('∆α')
subplot(2,2,3); plot(t,x(:,3)); grid
xlabel('t (sec)'); ylabel('∆q')
subplot(2,2,4); plot(t,x(:,4)); grid
xlabel('t (sec)'); ylabel('∆θ')
Accepted Answer
More Answers (0)
See Also
Categories
Find more on Loops and Conditional Statements in Help Center and File Exchange
Products
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!