How to Initialize a Discrete-Time Model?
13 vues (au cours des 30 derniers jours)
Afficher commentaires plus anciens
Hello,
I have the following discrete-time model.
num = [0.02884 -0.02844];
den = [1 -1.7298 0.7337];
H = tf(num,den,0.005);
opt = stepDataOptions('StepAmplitude',200,'InputOffset',250);
figure;
step(H, opt);
Is it possible to set the initial conditions of this transfer function? I would like to initialize the model output (rather than 0) without changing how the input looks like (i.e using InputOffset option in the stepDataOptions for the step()).
Daniel
0 commentaires
Réponses (1)
Farouk Moukaddem
le 26 Août 2016
Hi Daniel,
Theoretically speaking, Transfer Functions are defined when all initial conditions on a system are set to zero.
However, if initial conditions need to be changed, it has to be realized in state space (by using integrator in continuous time and unit delays in discrete time).
To specify initial conditions, convert your system to state-space model using the "tf2ss" command and use the State-space block in Simulink.
For more information on this, refer to the following documentation link:
Best,
Farouk
0 commentaires
Voir également
Catégories
En savoir plus sur Additional Math and Discrete dans Help Center et File Exchange
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!