In a stable control system backlash can cause which of the following?

A)
Overdamping
B)
Underdamping
C)
Low-level oscillations
D)
Poor stability at reduced values of open loop gain

Correct Answer : Option (C) :   Low-level oscillations

Explanation : In stable control systems, backlash is the form of the error which may cause low level of oscillations and hence can be useful sometimes as it increases the damping.

Recently Updated in Automatic Control Systems Questions
For a quadratic factor in denominator of transfer function the phase angle at corner frequency (in Bode phase angle plot)
A)
is +90°
B)
is -90°
C)
depends on the damping factor
D)
None of the above

Correct Answer :   is -90°

The response to sinusoidal excitation can be found by
A)
setting s = jω in the network function
B)
setting s = -jω in the network function
C)
taking inverse transform of network function
D)
None of the above

Correct Answer :   setting s = jω in the network function

The resolution of a wire wound potentiometer is about
A)
5%
B)
1%
C)
0.1%
D)
0.001%

Correct Answer :   0.1%

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