Biju Patnaik University of Technology 2008-5th Sem B.Tech (B Tech)control system engineering . - Question Paper
BPUT(B Tech) fifth semester control system engineering ques. paper.
Tolaf number of printed pages - 7 B.Tech
CPEE 5302
Fitth Semester Examination - 2008 CONTROL SYSTEM ENGINEERING Full Nlarks-70
Time-3 Hours
Answer Oueslion No. 1 which is compulsory
I wl and any five from me re$L
The figures in (he right-hand margin indicate marks,
7 *10
1, Give brief answGrs :
(t) Wtial is the transfer lunction of a system ' vqsb response =(0 to an input r(t) is given by the differential equation ;
+ 3 +5C=5r dt2 dt
|
(ii) What is overall transfer function of the system whose signal flow graph is shown  |
(vi) Explain gain margin and phase margin. (vii) What is the peak-overshoot for unit step response of the system described by closed loop transfer function, 49 s +16s + 49 |
|
(iii) What are the effects of negative feedback control on sensitivity to noise and parameter variation of a system ? (iv)' Explain the effects of adding a zero to a IWL second order system ? (v) What are the damping factor and natural frequency, con of the system shown in Fig. 2 ? CPEE 5302 Contd.  |
(viii) Draw the log-magnitude versus phase plot of a second order under damped system. (ix) What are the effects of integral control action ? , (x) What are the effects of derivative control action ? 2. (a) Explain the principle of operation and characteristics of a two phase servo , 4 motor. CPEE 5302 3 PT' |
Vn(S)
(b) Obtain the transfer function, of the cascaded R-C circuit shown in Fig, 3,
6
+
6
R, I.
|
TTTn L |
 |
+
V,
Fig. 4
(b) Obtain the expression for unit step* response of a second order under-damped system. 4
(a) Define lime response specifications. Obtain their expressions tor unit step response of a under damped second oftier system. 5
(b) Block diagram model of a control system is shown in Fig, 5. Determine the vatue of K such that the damping ratio is 0.5, Also obtain the values of rise time and maximum overshoot in its unit step response. 5
IWL
 |
|
Fig. 5 5 |
RTO.
|
fa) Using RouitvHufwai. Gmenon, mvestyHite Me stab<*<ty oJ system whoso char ac* lehstic egunifon #s 3 + s* +Zs* * 2s * 3s + 6 = 0 (b> Sketch the root locus ptol! o* a unity feedback system th forward path gam. G(S) 5<S 2)(S + 4) Find Ihe range ol K for which the system is under damped. 4 IWL (c) Explain Nyquisi criterion to1 determine stability of control systems 3 (a) Using Nyquist stabflity cntonon determine the stability of system with 4-t 3 6* (i) G(s)H(s)Sf3) S(S-1) t>t) G(s)H(s)- (S* IKS 1) |
(b) Sketch the potar ptots tor : 1 (l) G(sj H(s) 1-sT t in) G(s)H(s)s; SMsT) (a) Sketch the Bode plot tor; G{S) different s* - 2lHrs + ttiJ values of Obtain resonant frequency and' resonant peak. 5 (b) Describe Ihe construction, wording and applications of an Amplidyne. 5 S. (a) Explain ihe constant M-cirdes, the constant N-circles, and the Nichofs chart- 3 (b) Write a note on, applications of P+D controllers, 3 (c) Discuss the Zeigler-Nlchois method of tuning P-l-D controllers. 4 -C CPEE 5302 |
CPEE 5302 Contd.
|
Attachment: |
| Earning: Approval pending. |
