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Control Systems

Control Systems
Given a unity feedback system with G(s) = k/s(s+4), the value of k for damping ratio of 0.5 is

 4
 64
 16
 1

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Control Systems
In frequency response analysis of second order system, the error at corner frequency is

 20 log2ξ
 -10 logξ
 -20 log2ξ
 10 logξ

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Control Systems
The transfer function for tachometer E(S)/θ(S) is

 K/S
 K
 KS
 KS2

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Control Systems
A proportional plus derivative controller

 increases the stability of the system
 improves the steady state accuracy
 both 1 and 2
 has high sensitivity

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Control Systems
First Foster form of a LC network represents which element in the beginning?

 Resistor.
 Capacitor.
 Both A and B.
 Inductor.

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Control Systems
For type 1 system with parabolic input, the steady state error is

 indeterminate.
 zero.
 infinite.
 finite constant.

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