lvy>試卷(2022/08/05)

中山◆電機◆控制系統題庫 下載題庫

102 年 - 102 國立中山大學_碩士班招生考試_電機系(乙組):控制系統#110070 

選擇:0題,非選:10題 我要補題 回報試卷錯誤
【非選題】
1.

PROBLEM 1(40%) Given a system described by the following differential equation62eccc719ba5c.jpg
 where u is the control input and y is the output.


【題組】 (a) (10%) Find the transfer function of the system.


【非選題】
2.【題組】(b) (10%) Find the zero-input response y(t).

【非選題】
3.【題組】(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

【非選題】
4.【題組】(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

【非選題】
5.

PROBLEM 2 (30%) An LCR circuit is shown in Fig. 1, with its control input to be u, and output y = x2 .
62ecccadb5f99.jpg62ecce0bae212.jpg


【題組】 (a) (10%) Derive a state-space representation of this LCR circuit.


【非選題】
6.【題組】(b) (10%) Suppose L =C=R=1 and x1(0)=x2(0)=1. What is the output y in steady state if u =sin(t)?

【非選題】
7.【題組】(c) (10%) Following 2(b), let the control be u(t)=-k1x1(t)-k2x2(t). Choose the gains k1 and k2 such that the closed loop poles are -2 and -3. 

【非選題】
8.
PROBLEM 3 (20%)
 Figure 2 shows a simple temperature control of a machine tool cooling system, where r is the setting temperature and y is the coolant temperature. There is a delay of D seconds present in the cooling

【題組】(a) (10%) Use Laplace transform to derive the transfer function from e(t) to e(t-D).


【非選題】
9.【題組】

(b) (10%) Estimate the maximum allowable delay for the system to maintain at least 20 dB of gain margin, by using the approximation 62ecce476e180.jpg, when |ω|<<1.



【非選題】
10.PROBLEM 4 (10%) After dozing off in the Monday morning class, your classmate asked you: "Integral control adds negative phase, thus decreasing the phase margin. Why would we ever want to use integral control?" Explain how you would answer him. system.

懸賞詳解

國一英文上第三次

七、填入適當的人稱代名詞的格: Hi, my name is Dora.  (49) father is a doctor. My mother is a housewife.  (50)  cooks very well. And she helps  (51)  with  (52)  homework. Th...

10 x

前往解題

102 年 - 102 國立中山大學_碩士班招生考試_電機系(乙組):控制系統#110070-阿摩線上測驗

102 年 - 102 國立中山大學_碩士班招生考試_電機系(乙組):控制系統#110070