Unity Feedback System-Control Systems-Lab Reports, Exercises of Control Systems

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Lab 13: Effect of Gain on System Stability FA06_BET_012

Lab Task 1

Consider Unity Feed back system with open loop transfer function:

G(s) =

K = 1,2,5, for which K system is stable?

num = k(i) * [1 -1 2];

den = [1 2 1];

G = tf(num,den)

T = feedback(G,1)

figure, step(T)

figure, pzmap(T)

end

% Stable for k = 1

% Marginally Stable for k = 2