ME1402-MECHATRONICSQuestion bank

2 MarksUnit-I

1. Name the main elements constitute in mechatronic system.2. Differentiate open and closed loop system with example.3. Distinguish between a transducer and sensor.4. How do. you classify the sensors?5. What is the working principle of ~n eddy current proximity sensor?6. A hydraulic cylinder is to be used to move a work piece through a distance of

60 mm in 20 seconds. A force of 15 kN is required to move the work piece.Determine the required hydraulic liquid flow rate if a cylinder with a pistondiameter of 75 mm is available.

1. What is meant by incremental and absolute encoder?7. Draw the circuit diagram and waveform of cycloconverter.8. List the components employed in programmable logic controller.9. Write the difference between series and parallel interfacing.10. What is meant by sampled data type in computer numeric controller machine?11. How microcontroller is different from microprocessor?12. Enumerate the advantages of micro sensors over conventional sensor.13. Mention the constraints in mechatronic system design.14. How does a microcontroller differ from a microprocessor?15. What is address bus-data bus multiplexing?16. Write any two single byte instructions to clear the Accumulator.17. Name typical faults in microprocessors.18. How does PLC differ from relay logic?19. Distinguish between Traditional design approach and Mechatronics approach.20. Identify the different mechatronics systems used in automobiles.21. Suggest suitable actuator for robot arm joint and justify.22. Derive the equation for a translational mechanical system model with spring

and mass.23. Give an example for two-step mode control unit.24. Draw the ladder logic diagram to represent two switches that are normally

open and both have to be closed for a motor to operate.25. Devise a timing circuit that will switch an output on for 1 sec then off for

20 sec, then on for 1 sec, then off for 20 sec, and so on.26. Identify the sensor, signal conditioner and display elements in the Bourdon

pressure gauge.27. List the advantages of mechatronics design over traditional design.

16 marks11. Explain in detail about hydraulic and pneumatic actuators for amechatronic systems.12 (i) Determine the C(S)/ R(S) for a block diagram shown below. (10) (ii) Write short notes on servomechanism. (6)13. Explain in detail construction and working of LVDT. Also draw thecharacteristics of output voltage for diffel'ent core positions for LVDT.

14. With a neat sketch write the construction and working of a BLDC motorand a DC servomotor.15 Write short notes on following:

Logic functionLatchingLadder diagramI/O processing.

16. Discuss in detail about integrator and differentiator. Also draw its outputwaveform for square wave input.17. Explain ·path control loop for position and velocity control m mascontrolling system for constant frequency and constant velocitycommands. 18. With neat block diagram explain the architecture of 8051 microcontrollerand also write its addressing modes.19. Write short notes on :

Pressure sensor and thermal sensorsBulk manufacturing and surface manufacturing

20. With a neat sketch design a mechatronic system employed for materialtransfer in shop floor of manufacturing industry.

21. How was the discipline of Mechatronics evolved? Explain the evolutionstages. (16) 22. Explain open loop and closed loop system with neat sketches. (16)23.Explain with neat sketches the functioning of following sensors:

Pyroelectric Sensors. (8)Thermo diodes. (8)

24. Explain the principle and applications of proximity and Light sensors.(I6)25. With a neat sketch explain the architecture and pin configuration of aBOB5 microprocessor. (16) 26. Discuss the various requirements for development of interfaces inMechatronics devices. (16)27. Explain the use of ladder programming. (16)28.With a neat sketch explain the architecture of PLC. (16)29.(i) Discuss the traditional and mechatronics design approaches withan example. (ii) How do you develop a simple electronic weighing machine? Explain.30. Explain the design and implementation of Mechatronics case study for aPick and place Robot. (16)

31. (i) Compare and contrast the control system for the domestic centralheating system involving a bimetallic thermostat and that involvinga mICroprocessor. (8)(ii) Explain the static performance characteristics of a sensor. (8) 32. Write short notes on :

ThermocouplePiezoelectric transducerIncremental encoderPhotovoltaic transducer.

33. Discuss about the following actuation systems:

Self-excited wound field shunt configuration dc motor.Self-excited wound field series configuration dc motor.Stepper motor.Induction motor.(16)

34. A flat belt, 7 mm thick and 95 mm wide transmits power between twopulleys running at 1500 mlmin. The mass of the belt is 0.85 kg/m length.The angle of lap in the smaller pulley is 1550 and the coefficient offriction between the belt and pulley is 0.25. If the maximum permissiblestress in the belt is 2 MN/m2 find the maximum power transmitted andinitial tension in the belt. (16)35. A hot object with capacitance C and temperature T, cools in a large roomat temperature Ta. If the thermal system has a resistance R, derive anequation describing how the temperature of the hot object changes withtime and give an electrical analogue of the system. (16)36. (i) Propose a model for a stepped shaft used to rotate a mass andderive an equation relating the input torque and the angularrotation. Neglect damping effect. (8)(ii) Describe and compare the characteristics of

proportional controllerproportional plus integral controller. (8)

37. Devise a system, using a PLC that could be used with a conveyor beltwhich is used to move an item to work station. The presence of the itemat the work station is d'etected by means of breaking a contact activatedby a beam of light to a photosensor. There it stops for 100 sec for anoperation to be carried out and then starts moving. The motor for the beltis started by a normally open start switch and stopped by a normallyclosed switch. (16)38. Devise a circuit that could be used with a domestic washing machine toswitch on a pump to pump water for 100 sec into the machine, thenswitch off the pump and switch on a heater for 50 sec to heat the water.The heater is then switched off and another pump is switched on for100 sec to empty the water from the machine. (16)39. Explain the mechatronics systems used in an automatic camera with aneat block diagram. (16)40. Design a pick and place robot using mechatronics elements and explain 'about the robot control. (16)

B.E./B.Tech. DEGREE EXAMINATION, NOVEMBERIDECEMBER 2008.Seventh Semester

Mechanical EngineeringME 1402 - MECHATRONICS

(Common to B.E. Part-Time Mechanical Engineering)(Regulation 2004)

Time: Three hours Maximum: 100 marksAnswer ALL questions.

PART A - (10 x 2 = 20 marks)1. Identify the different mechatronics systems used in automobiles.2. What is the working principle of an eddy current proximity sensor?3. A hydraulic cylinder is to be used to move a work piece through a distance of 60 mm in 20 seconds. A force of 15 kN is required to move the work piece. Determine the required hydraulic liquid flow rate if a cylinder with a piston diameter of 75 mm is available.4. Suggest suitable actuator for robot arm joint and justify.5. Derive the equation for a translational mechanical system model with spring and mass.6. Give an example for two-step mode control unit.7. Draw the ladder logic diagram to represent two switches that are normally open and both have to be closed for a motor to operate.8. Devise a timing circuit that will switch an output on for 1 sec then off for 20 sec, then on for 1 sec, then off for 20 sec, and so on.9. Identify the sensor, signal conditioner and display elements in the Bourdon pressure gauge.10. List the advantages of mechatronics design over traditional design.

PART B - (5 x 16 = 80 marks)

11. (a) (i) Compare and contrast the control system for the domestic centralheating system involving a bimetallic thermostat and that involvinga mICroprocessor. (8)(ii) Explain the static performance characteristics of a sensor. (8)Or(b) Write short notes on :(i) Thermocouple(ii) Piezoelectric transducer(iii) Incremental encoder(iv) Photovoltaic transducer.12. (a) Discuss about the following actuation systems:(i) Self-excited wound field shunt configuration dc motor.(ii) Self-excited wound field series configuration dc motor.(iii) Stepper motor.(iv) Induction motor.Or(16)(16)(b) A flat belt, 7 mm thick and 95 mm wide transmits power between twopulleys running at 1500 mlmin. The mass of the belt is 0.85 kg/m length.

The angle of lap in the smaller pulley is 1550 and the coefficient offriction between the belt and pulley is 0.25. If the maximum permissiblestress in the belt is 2 MN/m2 find the maximum power transmitted andinitial tension in the belt. (16)13. (a) A hot object with capacitance C and temperature T, cools in a large roomat temperature Ta. If the thermal system has a resistance R, derive anequation describing how the temperature of the hot object changes withtime and give an electrical analogue of the system. (16)Or2 C 3389 (b) (i) Propose a model for a stepped shaft used to rotate a mass andderive an equation relating the input torque and the angularrotation. Neglect damping effect. (8)(ii) Describe and compare the characteristics of(1) proportional controller(2) proportional plus integral controller. (8)14. (a) Devise a system, using a PLC that could be used with a conveyor beltwhich is used to move an item to work station. The presence of the itemat the work station is d'etected by means of breaking a contact activatedby a beam of light to a photosensor. There it stops for 100 sec for anoperation to be carried out and then starts moving. The motor for the beltis started by a normally open start switch and stopped by a normallyclosed switch. (16)Or(b) Devise a circuit that could be used with a domestic washing machine toswitch on a pump to pump water for 100 sec into the machine, thenswitch off the pump and switch on a heater for 50 sec to heat the water.The heater is then switched off and another pump is switched on for100 sec to empty the water from the machine. (16)15. (a) Explain the mechatronics systems used in an automatic camera with aneat block diagram. (16)Or(b) Desigri a pick and place robot using mechatronics elements and explain 'about the robot control. (16)3 C 3389

B.E./B.Tech. DEGREE EXAMINATION, MAY/JUNE 2009.Seventh Semester(Regulation 2004)

Mechanical EngineeringME 1402 - MECHATRONICS

Time : Three hours Maximum : 100 marksAnswer ALL questions.

PART A - (10 x 2 = 20 marks)1. What is a measurement system?2. Explain the following terms: Response Time and Rise Time.3. What is the function of a poppet valve?4. What is the application of ratchet and pawl?5. Differentiate between ROM and EPROM.6. What is a Ladder Diagram?7. Write the equation for first order and second order systems.8. Why are PLC's considered suitable for shop floor?9. What is the basic principle involved in mechatronics design?10. What are embedded systems?

PART B - (5 x 16 = 80 marks)11. (a) (i) Draw the sketch of a closed loop control system and explain thebasic elements in the above system. (8)(ii) Explain shaft control system with a neat sketch. (8)Or(b) (i) Explain the principle and operation of optical encoders. (8)(ii) Describe the piezo electric sensors and tactile sensors. (8)12. (a) (i) Explain the principle of a pilot-operated valve. (8)(ii) Describe how a sequential valve can be used to initiate an operationonly when another operation has been completed. (8)Or(b) . (i) Explain the principle and operation of a relay controlled system. (8)(ii) Discuss the various types of D.C. motors and also control of D.C.motors. (8)13. (a) (i) Explain the mathematical model for rotating mass on the end of ashaft and for torsional spring mass system. (8)(ii) Distinguish between continuous and discrete process controllers. (8)Or(b) (i) Discuss the principle and operation of PID controller. (8)(ii) Explain the principle and operation of self-tuning circuit. (8)14. (a) (i) Describe the different logic functions and their performance. (8)(ii) . How is sequencing done in a pneumatic system? (8)Or(b) (i) Discuss the following:Timer, Cascad~d Timer and On-off Cyclic Timer. (8)(ii) Explain how the shift register can be used for sequencing events. (8)15. (a) (i) Explain the various design process involving different stages. (8)(ii) What are the differences between traditional and mechatronicsdesigns?(8)

Or(b) Explain with a diagram how a micro controller can be used, to controlsolenoid valves to' actuate a robot unit. (16)

B.E./B.Tech. DEGREE EXAMINATION, NOVEMBERIDECEMBER 2009.Seventh Semester

EngineeringME 433 - MECHATRONICS

(Regulation 2001)Answer ALL questions.

Time : Three hours Maximum: 100 marks

PART A - (10 X 2 = 20 marks)1. Define Mechatronics.2. Explain the difference between open loop and closed loop controllers.3. Distinguish between a transducer and sensor.4. How do. you classify the sensors?5. How does a microcontroller differ from a microprocessor?6. What is address bus-data bus multiplexing?7. Write any two single byte instructions to clear the Accumulator.8. Name typical faults in microprocessor.9. How does PLC Differ from relay logic?10. Distinguish between traditional design approach and mechatronics approach

PART B – (5 X 16=80Marks)11. (a) How does the discipline of mechatronics evolved? Explain the evolution stages.

Or(b) Explain open loop and closed loop system with neat sketches. (16)

12. (a) Explain with neat sketches the functioning of following sensors:(i) Pyroelectric Sensors. (8)(ii) Thermo diodes. (8)

Or

(b) Explain the principle and applications of proximity and Light sensors. (I6)

13. (a) With a neat sketch explain the architecture and pin configuration of a8085 microprocessor. (16)

Or

(b) Discuss the various requirements for development of interfaces inMechatronics devices. (16)

14. (a) Explain the use of ladder programming. (16)Or

(b) With a neat sketch explain the architecture of PLC. (16)

15. (a) (i) Discuss the traditional and mechatronics design approaches withan example. (B)

(ii) How do you develop a simple electronic weighing machine? Explain. (8)

Or(b) Explain the design and implementation of Mechatronics case study for a

Pick and place Robot. (16)B.E./B.Tech. DEGREE EXAMINATION, NOVEMBERIDECEMBER 2009.

Seventh SemesterEngineering

ME 433 - MECHATRONICS(Regulation 2001)

Answer ALL questions.Time : Three hours Maximum: 100 marks

PART A - (10 X 2 = 20 marks)