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103年 - 103 國立中山大學_碩士班招生考試_電機系(乙組)：控制系統#110068
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題組內容
PROBLEM 4(30%) Answer the questions about the feedback system in Fig.4.
a. (15%) Determine for the range of real number & the feedback system is stable
其他申論題
a.(20%) Estimate the values of J and B.
#471551
b. (20%) Suppose that we employ a unity feedback to control the motor anguiar velocity and set the desired angular velocity to 100 rad/s, as shown in Fig. 2. Assume the load torque is constant TL=0.1. Determine the phase margin of this feedback system. Also estimate the regulation error e(t) in steady state. y do(t)
#471552
PROBLEM 2(15%) Consider a system with the following unit step response y. Determine the poles and zeros of the system.
#471553
PROBLEM 3 (15%) Assume the operational amplifier in Fig. 3 is ideal. Show that the transfer function for the circuit can be written in the form Determine the values of KP, KI, KD.
#471554
b. (15%) Assuming k=0, estimate the amplitude of the steady-state error when the reference input is r(t) = cos(2t).
#471556
(a) (10%) Find the transfer function of the system.
#471557
(b) (10%) Find the zero-input response y(t).
#471558
(c) (10%) Choose, among the following types of control, ones that are likely to stabilize the system (One or more answers may be correct. Answers without supporting explanation are not acceptable) : (i) P control (ii) I control (iii) D control (iv) PID control (v) PD control (vi) PI control
#471559
(d) (10%) Choose, among the following types of control, ones that are likely to regulate the system output to a constant level 0.5 with zero steady state error (One or more answers may be correct. Answers without supporting explanation are not acceptable): (1) P control (ii) I control (iii) D control (iv) PID control (v) PD control (vi) PI control
#471560
(a) (10%) Derive a state-space representation of this LCR circuit.
#471561
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