Signals and Systems

FYI prob 1 is ...

Suppose P(s) = 1/(4s + 1)^2 Find the maximum crossover frequency that can be achieved by a PI subject to the constraint that the Phase Margin is at least 45deg. Use 1/2 of the maximum crossover frequency to design PI controller with 45deg PM. Verify in MATLAB. using bode/step (feedback(P*C, l)) For the feedback system shown below, compute the transfer functions y/d, x/d. What are the steady-state values for a constant d and when do they approach 0 asymptotically as t goes to infinity