B E1131 Pages: 3

9 2) Consider the block diagram given in figure below. Draw the signal flow graph (6)
corresponding to the block diagram. Find the overall transfer function using

Masons Gain Formula.

b) Verify your answer using Block diagram reduction techniques. (4)
10 a) Explain the constructional features and principle of operation of a (5)
synchro?

b) What are the advantages of stepper motor? List two applications of the stepper (5)
motor?

11 a) Find the step response of a system with transfer function (6)
4

5८5 + ¢) + 4 1 ‏4دم‎ and b 55. Also find the effect of b on damping ratio?

b) With the help of a circuit diagram explain Force — Voltage and Force — Current (4)

analogy?
PART C
Answer any two full questions, each carries 10 marks.
12 a) Consider the system given in figure below. Given Km= 2 and Tm= 1. (7)

If Ka=1 find steady state error to step, ramp and acceleration input.

b) What will happen to steady state errors if Ka is increased to 10? (3)

13 a) Explain the significance of angle and magnitude criterion in root locus? (5)

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