CONTROL SYSTEMS QUIZ

Find the stability for the following transfer function G(s) = 50/s(s+5) ?

Stable

Unstable

Marginally stable

Critically stable

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Number of sign changes in the entries in 1st column of Routh array denotes the no. of

zeroes of system in RHP.

roots of characteristic polynomial in RHP.

open loop poles in RHP.

open loop zeroes in RHP.

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A function of one or more variables which conveys information about the nature of physical phenomenon is called

interference.

noise.

system.

signal.

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A second order control system has F(jω) = 100/(100 - ω² + 10√2 jω). Find the resonant peak?

0.5

1

0.707

1.5

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Consider a point S = -3 + j4 in the s-plane. Then for a system with the open loop transfer function ?

S is not on root locus

S is on root locus

either 1 or 2

None of these

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The characteristic equation of a feedback control is 2s4 + s3 + 3s2 + 5s + 10 = 0. The no of roots in the right half of the s-plane is

0.

4.

2.

3.

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The value of 'a' in to give phase margin = 45o will be

0.707.

0.9.

1.18.

1.414.

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The system having characteristic equation is used to be an oscillator. What is the value of k?

2

1

4

3

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A controller transfer function is given by . What is its nature and parameter?

lead compensator, α = 0.2

lead compensator, α = 0.1

lag compensator, β = 2

lag compensator, β = 10

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The error of a system to a ramp input is 1/5, if the type of the system is decreased by one, then the error of unit step input is

0.167

5

0.2

6/5

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