Q4: A unity feedback system with open-loop transfer function given as: 73.1 G(s) = (s + 1)(s + 3)(s + 10) without affecting its operating point (-1,54 † j2.66) appreciably a- Design a suitable compensator to drive the step response error to zero. b- Design a suitable compensator to reduce step error by factor of 5.

Feedback Position Control 1) What is the difference between Open-Loop vs Closed-Loop  (Freedback) 2) Explain how feedback works.

Question 6 Calculate the gain margin in linear scale of a feedback control loop, when its open loop transfer function has no unstable poles and has associated the Nyquist plot si below, where a=0.71. Give your answer to 2 decimal places. Nyquist Diagram 0.6 0.4 0.2 -0.2 -0.4 -0.6 -2a/5 Real Axis -a/5 -a -4a/5 -3a/5 a/5 Calculate your answer to 2 decimal places.

For the model defined in Question , is the closed loop system with the negative feedback control law?     a. unstable b.asymptotically stable c.not unstable d.not asymptotically stable