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G193016 Pages:2

Answer any four full questions, each carries 10 marks.

Describe the working of permanent magnet stepper motor.

Describe the terms pull-in torque, pull-out torque, slew range and step angle for
stepper motor.

List the basic building blocks to mathematically model a mechanical system.

A hot plate having capacitance C and temperature T cools in a large room
having temperature 7,. Consider the thermal resistance for the system as R.
Develop a mathematic model to represent change in the temperature of the hot

plate with time.

Explain one application of pulse width modulation (PWM)
Describe the configuration, working and features of harmonic drive.
Discuss the features of CCD and CID cameras.

Describe one application of thresholding using histogram.

Discuss the functioning of a robotic vision system

Suggest one application for histogram sliding

In a car park system, a horizontal bar barrier is to be lifted to vertical position
when a vehicle reaches nearby and pay the parking fees. The barrier remains in
vertical position for 10 seconds to allow the vehicle to pass and comes back to
horizontal position. This sequence is to be repeated for every vehicle. The
position of barrier is to be sensed by proximity sensor and its movement is
controlled by a pneumatic circuit. Develop a PLC ladder program for the

sequence and pneumatic circuit for the actuation.

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