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Control Systems

Control Systems
Which of the following is the electrical analogous element for displacement in force-voltage analogy?

 Flux.
 Current.
 Charge.
 Voltage.

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Control Systems
A first order control system is initially at 0 V and subjected to a sudden input at t=0. Its output reaches 1.1 V in 4 sec and eventually reaches steady state of 2 V. Find the time constant?

 6 sec
 5 sec
 2 sec
 4 sec

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Control Systems
The output of the system has an effect upon the input quantity, then the system is a

 open loop control system.
 closed loop control system.
 either 1 or 2.
None of these

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

 lead compensator, α = 0.2
 lag compensator, β = 10
 lag compensator, β = 2
 lead compensator, α = 0.1

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Control Systems
A unity feedback control system has forward loop transfer function as e-Ts/s(s+1). Its phase value will be zero at frequency ω1. Which of the following equations should be satisfied by ω1?

 Tω1 = tan(ω1)
 ω1 = cot(Tω1)
 Tω1 = cot(ω1)
 ω1 = tan(Tω1)

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

 1.5
 0.5
 1
 0.707

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