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Control Systems

Control Systems
Force balancing equation of a dash-pot element is (where, x = displacement)

None of these
 B d2x/dt2
 B dx/dt
 B *x

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Control Systems
Which of the following is/are the characteristics of negative feedback control system?

All of these
 Rejection of disturbance signals
 Reduction in gain at the expense of better stability
 Low sensitivity to parameter variations

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Control Systems
Error constants of a system are a measure of

 relative stability.
 transient state response.
 steady state response as well as transient state response.
 steady state response.

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Control Systems
The steady state error due to ramp input for a type two system is equal to

 constant.
 non zero number.
 infinite.
 zero.

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Control Systems
Open loop transfer function,

 all pass filter.
None of these
 band stop filter.
 band reject filter.

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Control Systems
The transfer function of phase lead compensator is given by , where, T > 0, α < 0. What is the maximum phase shift provided by this compensator?

 cos-1((1 - α)/(1 + α)
 sin-1((1 - α)/(1 + α)
 tan-1((1 - α)/(2√α)
 both 1 and 3

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