Cochin University of Science and Techology (CUST) 2005-6th Sem B.Tech Mechanical Engineering ,, Instrumentation Theory And Control Engineering - Question Paper
B.Tech. Degree VI Semester Examination, June 2005
BTS-(C)-VI-05 - 024(1)
ME 603 INSTRUMENTATION THEORY AND CONTROL ENGINEERING
(2002Admissions)
Tone: 3 Hours Maximum Marks: 100
I a) Explain tbe following terms with examples:
i) accuracy ii) precision
iii) loading effect iv) hysterisb (10)
b) Explain mathematical modelling of a measurement system. (4)
c) What are zero order, I order and II order system? (6)
OR
II a) Explain different type* of errors men instrumentation system. (10) b) Explain mercury in glaaa thermometer as a 1 order instrument. (10)
III ) Compare hydraulic and pneumatic load ceUs. (10)
b) Explain Infrared Pyrometry. (10)
OR
(V a) Explain a gas chromatograph. (10)
b) Explain say ooe method of radiation measurement (10)
V ) Find tbe transfer function of the electrical system shown in the figure below: (8)
if T*
-t.
b) Give (be state space representation of tbe above system. (6)
c) Explain the transient response ofa I order system for a step input (6)
OR
VI a) Find (he transfer ftmctioo of a liquid level system. (10)
b) Explain the transient respooae of a II order system for a step input.
What it damping? (10)
VD a) Wbat k stability ofa system? (4)
b) What are tbe location of poles of the transfer function for a stable system? (6)
c) Determine tbe range of k for stability of a unity gain feed back system whose
open loop transfer function is G{s) * . (10)
t{s + \Xs*2)
OR
VIII a) Sketch tbe Bode ptot of tbe following trantfer (taction and determine gain
and phase margin*. (12)
b) How can we chock tbe stability ofa system using Bode Plot (8)
IX a) Compare pneumatic and hydraulic controllers. (10)
b) Explain the principle of wor**ing of a DC servo motor.
State any 2 applications of tbe same. (8+2**I0)
OR
X a) Explain a PID coctroBar with its transfer fraction and step recponse. (10)
b) Write short note* on:
i) Stepper motor ii) Taebo generator (10)
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