[試題]

[overflow2 (ξεχυλιζω)]

課程名稱︰控制系統
課程性質︰選修
課程教師︰陳永耀
開課學院：電資學院
開課系所︰電機系
考試日期（年月日）︰
考試時限（分鐘）：
是否需發放獎勵金：是
（如未明確表示，則不予發放）

試題 :

1.Given a closed-loop system as shown in Fig.1 where G(s)=6/(s+1)(s+2) and H(s)
   =1/(s+p)

(a)Please sketch the root locus for the closed-loop system with 0<p<∞ (10%)

(b)Please find the range for p such that the closed-loop system is stable(5%)

(c)Please estimate the value of p such that the corressponding closed-loop
   system has dominant poles with damping ration ζ=0.707(5%)

2.Consider a closed-loop control system as shown in Fig.2

(a)Please check to see if the system is stable with K=1(10%)

(b)Please check to see if the system is stable with K=5(10%)

3.Given a unity-feedback closed-loop system,the Bode plot of the open-loop
  transfer function is shown in Fig.3. Suppose that the closed-loop system is
  expected to have a phase margin of 45 degree and the steady state error less
  than 5% for a ramp input.

(a)Please first describe the design methodology you will adopt in details and
   the reason for such a design.(10%) (Hint:please describe step-by-step
   procedures)

(b)Please complete the design.(10%)

4.Given a unity-feedback closed-loop system , the Bode plot of the open-loop
  transfer function is shown in Fig.4(a) and Fig.4(b) in two different case.

(a)Please describe the methods in details we can use to determine the
   stability of the closed-loop system.(Hint: there are two common method in
   such a case) (10%)

(b)Based on the answer in (a) ,please determine the stability of the
   closed-loop system in Fig.4(a) and Fig.4(b) separately.(10%)

(c)What is a minimum-phase system?(Bonus 10%)

5.Please describe the design proceduer for a PID control system.(Hint:There
  are three controller parmeters in a PID controller. How does one determine
  the initial setting of the parameters? How the tuning process be proceeded?
  What will be the guidelines for tuning? What should be consider if actuator
  saturation is possible in the closed-loop system? )(20%)

--
※ 發信站: 批踢踢實業坊(ptt.cc)
◆ From: 140.112.174.136
推 davidtea:這不是電工實驗(自動控制)喔  這是"控制系統"
※ 編輯: overflow2       來自: 140.112.174.136      (02/12 00:45)
→ overflow2:打錯了XD
推 RoarLiao:不過 跟機械系的自動控制  幾乎一樣嘛...
推 ospery:easier...
推 cockskin:原po賺很大啊！
→ overflow2:^^