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）︰2008/04/24
考試時限（分鐘）：120
是否需發放獎勵金：是
（如未明確表示，則不予發放）
試題 :
1.(a) Please explain the purpose of deriving a mathematical model for a process
to be controlled.(10%)
(b) What are the benefit if you have a more accurate model of the process to
be controlled than a less accurate one?(10%)
(c)How do you compute the transfer function model and the stste space model?
(10%)
2.Given a second-order dynamic system, suppose the step response of the system
has to satisfy the following constraints:
(i)overshoot < 20%
(ii)rise time < 0.8 sec
(iii)settling time < 4sec
(a)Please mark the region of the permissible pole locatiions for the dynamical
system such that all the three specifications are satisfied.(10%)
(b)Please choose the most "feasible" pole locations and explain the reason of
your choice.(10%)
3.(a)Please describe the design procedures of a PID control system.(please
explain the structure and function of the PID terms as detailed as possible.)
(15%)
(b)For a PID control system, suppose that an actuator saturation is present,
what will be the possible difficulty encountered? what will be the measure for
solving the problem?(10%)
4.For a unity-feedback control system with an open-loop transfer function
G(s)=1/ ( s*(s^2+s+1) )
(a) Please choose the correct statements(maybe more than one) (10%)
(A)For a step input, the steady-state error of the closed-loop system is zero
(B)For a ramp input, the steady-state error of the closed-loop system is zero
(C)For a unity step input, the value of the steady-state response of the
close-loop system is 1.
(D)Type-one system always has a finite and non-zero steady-state error for a
step input,
(E)Type-one system always has a finite and non-zero steady-state error for a
ramp input.
(b) Please give the definition of Type-N system and give explanations on your
choices.
5.(BONUS) What is the name of the Teaching Assistant and his Lab/phone number?
(5%)
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