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Question 2 ( MATLAB etc ) : ( Cohen - Coon ) a ) The step response of a open loop system depicted in Figure

Question 2(MATLAB etc): (Cohen-Coon)
a) The step response of a open loop system depicted in Figure 2 is given in Figure 3. Design , P, PI and PD controllers for
system given in Figure 2-3. Illustrate the closed-loop system behaviour for each designed controller using matlab.
Fig. 2 Closed-loop control system
Fig. 3 Step response of controller
b)Plot the response of the closed-loop system, control signal etc via Matlab, and comment on results. Explain the reason of
more overshoot. Plot control signal. Show all result via matlab.
(c)Disturbance Rejection: Apply a step type input disturbance and illustrate whether the designed controller rejects the
disturbance for PD designed in previous step. Find the disturbance rejection time. Depict the control signal.
Measurement noise: Add a measurement noise with or n(t)=0.2rand(t)) value. Illustrate the system output, control
signal etc.
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