1
Seat No.: Enrolment
GUJARAT TECHNOLOGICAL UNIVERSITY
PDDC SEMESTER-VII EXAMINATION WINTER 2018
Subject Code:X71904 Date: 29/11/2018
Subject Name: Control Engineering
Time: 10:30 AM TO 01:00 PM Total Marks: 70
Instructions:
1. Attempt all questions.
2. Make suitable assumptions wherever necessary.
3. Figures to the right indicate full marks.
Q.1

What is control Engineering? Classify the control systems.
07

Differentiate closed loop and open loop system and derive the equation for transfer function of closed loop system
07
Q.2

Write a short note on analogues model ands of mechanical and electrical system.
07

Determine transfer function using block reduction technique.
07
OR

Obtain transfer function using masons formula.
07
Q.3

What is transient response derive equation for rise time, delay time and peak time
07

The closed loop transfer function of a second order system is given by Determine the damping ratio, natural frequency, delay time ,rise time, settling time and peak overshoot.
07
OR
2
Q.3

What is steady state error explain position, velocity and acceleration error constant
07

The unity feedback system is characterized by an open loop transfer function Determine gain K so that the system will have a damping ratio of 0.5. For this value of K determine, peak time, settling time and maximum overshoot.
07
Q.4

Explain PID controller for hydraulic system or pneumatic system
07

Classify DCV and explain 3 direction control valve with figure.
07
OR
Q.4

Write a short note on D C motor control
07

Write a short note on microprocessor base controller
07
Q.5

Check by routh stability criteria
S6 2s5 8s4 +12s3+ 20s2 16s 16=0
07

Write short note on PLC control
07
OR
Q.5

Write short note on fuzzy logic
07

Explain boiler feed back control system or liquid level system
07