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Chapter: Mechanical - Mechatronics - Design of Mechatronics System

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Important Questions and Answers: Mechatronics - Design of Mechatronics System

Mechanical - Mechatronics - Design of Mechatronics System

1.List down the various stages in mechatronic system design.

 

1.need of design 2.analysis the problem

 

3.preparation of specification 4.generation of possible solution 5.selection of suitable solution 6.production of detailed design 7.production of working drawing 8.implementing of design

 

2.List the drawbacks of traditional design approach. [AU, Nov / Dec - 2012] 1.less flexible

 

2.less accurate

 

3.more complicate mechanism in design

 

4.it having more components and moving parts

 

3.Compare traditional and mechatronic design.

 

s.no Traditional approach

1 The cam operated rocker arm mechanism  control the valve operation. The rotation of  cam is based on the crank rotation

2 The engine speed regulation is based on the  governor controlled throttle valve. The  governor is actuated by the speed of the  crack shaft. The speed control has no effect  on the engine temperature and air flow

3 Spark timing of the spark plug is controlled  by the ignition coil and distributer at  constant pre-set interval

 

 

sno Mechatronics approach

1 The valve operation is controlled by the signal received from electronic control unit .The timing of valve operation is pre- programmed in the micro controller

2 The engine speed regulation is based on the input signal from speed sensor, temperature sensor and MAF sensor. Based on the sensor information the throttling valve is controlled by micro controller

3 Spark timing of the spark plug is controlled by the ignition coil that receives signals from the micro controller through a timing sequence program

 

 

4.Name the sensors used in car Engine management system.

 

1.Air flow sensor

 

2.Ford type MAP sensor

 

3.Hall effect and AC excited sensors

 

5.Write the basic steps of the program to run a stepper motor?

steps1: advance astep by applying a data

step 2: call time delay routine to complete steps

 

step3:repeat step 1,2until the required no of steps completed in forward direction

 

step 4: To reverse the direction of stepper motor , the same steps given above are repeated in the reverse order of data

 

6.Distinguish between traditional approach and mechatronics design approach

s.no   Traditional approach

1        It is based on traditional mechanical          elements such as gear , spring , levers

2        More complicated mechanism and    moving components

3        Input through pre-stressing of string

4        Timing is less accurate

 

Mechatronics approach

1        It is based on mechanical, electronics , computer technology and control engineering

2        less  complicated mechanism and moving components

3        Input through battery cell

4        Timing is more accurate

 

7.What is the role of opto – isolator in robot control?

 

TRIAC opto isolator consists of LEDand TRIAC . If the input of the led is 1, it glows and activate the TRIAC to conduct the current to the solenoid valve. otherwise TRIAC will not conduct the current to the solenoid valve.

 

8. What is meant by Duty Cycle?

 

A duty cycle is the time that an entity spends in an active state as a fraction of the total time under consideration .

 

9. What is mean by wireless surveillance balloon?

 

It is an Aerostats or Tethered balloons which carry surveillance cameras high up in the air to obtain a broader perspective view of the target area.

 

10. What is an electronic engine management?

 

An electronic engine management system is made up of sensors , actuators, and

 

related wiring that is tied into a central processor called microprocessor or micro computer

 

11.            List out the various  sensors used in engine management system?

 

1.Throttle position sensor

 

2.EGO sensors

 

3.MAP sensors

 

4.temperature sensors

 

5. Engine position sensors

6. 6.MAF sensors

 

7.knock sensor

 

 

12.            List down the various Mechatronics elements in an automatic camera.

 

1.Auto focusing mechanism control

 

2.mirror drive

 

3.lens drive

 

4.lens position encoders

 

13.            Automatic camera is a Mechatronics system - justify

 

A typical Mechatronics system should have some of the basic elements such a actuators , sensors , signal conditioning elements , digital logic systems. software display etc. As the automatic camera has all those elements , it is considered s Mechatronics system .

 

14. Name the two barriers used in automatic car parking system and state its uses .

 

There are two barrier used namely in barrier and out barrier . IN barrier is used to open when the correct money is inserted while out barrier open when the car is detected in front of it

 

15.list out the various application of the wireless surveillance balloons

 

1.border security in military

 

2.enhancing battlefield

 

3. coastal surveillance 4.terrestial mapping

 

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