作者overflow2 (ξεχυλιζω)
看板NTU-Exam
标题[试题] 96下 陈永耀 控制系统 期中考
时间Sat Apr 26 18:49:15 2008
课程名称︰控制系统
课程性质︰选修
课程教师︰陈永耀
开课学院：电资学院
开课系所︰电机系
考试日期（年月日）︰2008/04/24
考试时限（分钟）：120
是否需发放奖励金：是
（如未明确表示，则不予发放）
试题 :
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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