need help in understanding with feedback command
1 visualizzazione (ultimi 30 giorni)
Mostra commenti meno recenti
I am using these commands to develop my transfer function with state space matrix, using pidtune to develop closed loop system
sys=ss(A_b,B_b,C_b,D1);
TFbuck=tf(sys);
C = pidtune(TFbuck,'PID')
These are the three commands that I have tried for closed loop controller. syst11 and syst1 are same (default is a negative feedback loop, or we can specify -1). But the first command, syst gives me different transfer function as compared to syst11, syst1. What is the difference in computation that gives different results.
syst = feedback(TFbuck*C,1)
syst11 = feedback(C,TFbuck,-1)
syst1 = feedback(C,TFbuck)
0 Commenti
Risposta accettata
Paul
il 23 Mag 2023
Hi shipra,
In accordance with the the doc page feedback, the first argument is the forward path gain and the second argument is the feedback path gain, the third argument is the sign of the feedback, default is -1. So, we have mathematically
syst: TFbuck(s)*C(s)/( 1 + 1*TFBuck(s)*C(s) )
syst11 = C(s)/( 1 + TFBuck(s)*C(s) )
syst1 = C(s)/( 1 + TFBuck(s)*C(s) )
Più risposte (0)
Vedere anche
Categorie
Scopri di più su Classical Control Design in Help Center e File Exchange
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!