I have a plant model with 1 zero and 2 poles(call it P(s)).The structure of a PPF compensator is (g*w^2)/(s^2 + 2*zeta*w + w^2).Call it G(s). Since the PPF compensator is in a positive feedback loop with the plant, the closed loop transfer function looks like P(s)/(1-G(s)*P(s)).. The parameters to be determined : gain,g; filter frequency, w and filter damping ratio, zeta. Would u suggest a method to determine these parameters?
Thanks in advance...