JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD
JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD B.Tech III INTRODUCTION TO MECHATRONICS Previous Question Paper (February - 2023 - R16)
Part A is compulsory (25 Marks). Answer all questions. In Part B, Answer any one question from each unit (10 Marks each).
Part A
Label the significance of signal conditioning.
Answer
Signal conditioning is the process of manipulating an analog signal in such a way that it meets the requirements of the next stage in a signal processing chain. Its significance includes:
- Amplification: Increasing the magnitude of low-level signals to match the input range of data acquisition systems.
- Filtering: Removing unwanted noise or interference to improve the signal-to-noise ratio.
- Linearization: Converting non-linear sensor outputs into linear signals for easier processing.
- Isolation: Protecting sensitive electronic components from high-voltage spikes or ground loops.
Summarize high pass filtering.
Answer
A High Pass Filter (HPF) is an electronic circuit that allows signals with a frequency higher than a specific cutoff frequency to pass through while attenuating signals with frequencies lower than the cutoff. The fundamental relationship is defined by:
It is primarily used in audio systems for tweeter protection, in communication systems to remove DC offsets, and in biomedical signal processing to eliminate baseline wander.
Interpret precision mechanical systems.
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List the limitations of circuit breakers.
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Label the applications of microprocessor.
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Explain pulse width modulation in brief.
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Outline the advantages of programmable logic controllers.
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Summarize PLC Selection.
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What are the functions of proximity sensors?
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Illustrate continuous and discrete processes in brief.
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Unit I
Explain PC Based Real Time Operating Systems and Graphical User Interface.
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Evaluate notch filtering.
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Analyze the applications and identification of sensors and actuators in Engine Management and FMS.
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Unit II
Elaborate the design aspects in machine structures, guide ways, feed drives, spindle and spindle bearings in modern CNC machines.
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Judge CMOS interfacing, sensor interfacing and actuator interfacing in detail.
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Unit III
Distinguish between DC brushed motors and DC brushless motors.
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Evaluate various types of digital to analog convertors with neat sketches.
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Explain relays and solenoids.
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Unit IV
Analyze basic structure of programmable logic controllers.
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Explain working of timers, internal relays and counters used in programmable logic controllers.
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Unit V
Evaluate P, PI, PID Control with neat diagram.
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Discuss working of infrared sensors.
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Analyze the working of optical incremental encoders and inductive sensors.
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Explain S. Curve in detail.
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