Servo Mechanisms

Question 1

Describe the purpose of the following Systems components shown in the Open Loop system diagram

Answer 1

Input transducer -Converts one form of energy into another and creates the demand signal

Amplifier - Amplifies the demand signal to a size large enough to drive the motor

Motor - Moves the load to the new position

Load- The object that requires movement

Question 2

Disadvantages of closed loop

Answer 2

More expensive

Complex

Slower response time due to position feedback

Question 3

2 applications of a/c closed loop control system

Answer 3

Control surface
Throttle control
Breaking systems
Temperature control
Heated windscreen

Question 4

2 applications of a/c closed loop control system

Answer 4

Control surface
Throttle control
Breaking systems
Temperature control
Heated windscreen

Question 5

4 servomechanism classification requirements

Answer 5

Error actuated
Power amplifications
Control, provide, negative feedback
Continuous operation

Question 6

Explain E and I bar

Answer 6

The I bar has moved closer to the right hand secondary coil and further away from the left hand secondary coil. This change in induced EMF causes an increased. voltage in the right-hand coil and a decreased. voltage in the left-hand coil.
With a difference in the outputs from each secondary coil, the ….Phase… of the output determines the direction of movement and the amplitude. determines the amount of movement.

Question 7

List types of inductive transducers

Answer 7

-LDVT
-control synchro
Torque synchro
Resolver synchro
Differential synchro