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Reg No.: Name:
APJ ABDUL KALAM TECHNOLOGICAL UNIVERSITY

Seventh semester B.Tech examinations (S), September 2020

Course Code: EC409
Course Name: CONTROL SYSTEMS
Max. Marks: 100 Duration: 3 Hours
PARTA
Answer any two full questions, each carries 15 marks. Marks
1 a) Compare open loop and closed loop system with suitable examples. (5)
b) Find the transfer function using Mason’s gain equation (10)

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2 a) Determine the rise time, peak time, settling time and peak overshoot of a second order 00൧൧01] (5)
system subjected to a unit step input. The damping ratio = 0.5 and undamped natural

frequency w,, = 6 rad/sec.

b) Derive an expression for rise time of a second order system. (5)
c) Derive an expression for time response of a second order under damped system to step input. (5)
3 a) Find the transfer function of the given system using block reduction technique (10)

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