How to put a impulse disturbance in a control signal of a simulink model?

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Pramit Biswas
Pramit Biswas 2013-8-28
评论： Shrinivas Iyengar 2021-6-10
I want to give disturbance(not random) automatically in to system.
Say, 5 unit impulse

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回答（1 个）

Azzi Abdelmalek
Azzi Abdelmalek 2013-8-28
Use a pulse generator block
  2 个评论
Toby Russell
Toby Russell 2020-8-24
how do you do it in pure code in mat lab?
trying to add disturbance at 40 seconds in this code, but its not working properly...
it is supposed to be a step disturbance at 40 seconds then return to 1
theta = 0.27; % Defines the dead time in the process
kp = (0.14/K)+((0.28*tau)/(theta*K)) % Defines the Proportional element CORRECT
ki = ((0.33*theta) + ((6.8*theta*tau)/(10*theta+tau))) % Defines the Integral element CORRECT
G_disturbance = (exp(-40*s)*(1))
haggast1 = feedback ((kp + (ki/s)) * sysmod,1); % Applying the Hagglund-Astrom tuning
%haggast1 = feedback K*(1+(ki/kp)/s) * sysmod,1);
step (haggast1,'g')
hold on
step (sysmod,'k')
title ('Haggland-Astrom Tuning')
step (haggast1 + G_disturbance,'r',100) % Applying Disturbance
legend ('haggast1','sysmod','disturbance')
hold off
Applying the Cohen and coon PI Tuning
theta1 = 0.1;
kp1 = (1/K)*(tau/theta1)*(0.9+(theta1/(12*tau))) % Defines the Proportional element CORRECT
ki1 = (theta1*(30+(3*(theta1/tau))) / (9+(20*(theta1/tau)))) % Defines the Integral element CORRECT
CC = feedback ((kp1 + ki1/s) * sysmod,1); % Applying the Cohen Coon tuning
step (CC,'g')
hold on
step (sysmod,'k')
title ('Cohen Coon Tuning')
legend ('CC','sysmod')
hold off
Shrinivas Iyengar
Shrinivas Iyengar 2021-6-10
Did you end up finding how do you add distrubance to a system in MATLAB code? I have a tunable PID that I tuned with systune. I have connected all the system blocks with the connect function. I would like to add an input disturbance, and see its step response. I can do this easily in Simulink (and I can eve chose at what time period I want to add the disturbance). Is it possible to do this in MATLAB?
.

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