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Control Systems
When the input to a system was with drawn at t = 0, its output was found to decrease exponentially from 1000 units to 500 units in 1.386 sec. The time constant of the system is
1.386.
0.500.
0.693.
2.000.
1.386.
0.500.
0.693.
2.000.
Answer
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Control Systems
An open loop control system, represented by the transfer function G ( s ) = ( s - 1 ) / ( s + 2 )( s + 3 ), is
unstable and of the minimum phase type.
stable and of the non-minimum phase type.
unstable and of the non minimum phase type .
stable and of the minimum phase type.
unstable and of the minimum phase type.
stable and of the non-minimum phase type.
unstable and of the non minimum phase type .
stable and of the minimum phase type.
Answer
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Control Systems
Which of the following represents the value of resonant frequency (ωr)?
(ωn) √(1-ζ²)
2*(ωn) √(1-ζ²)
(ωn) √(1-2ζ²)
(ωn) √(1-ζ²/2)
(ωn) √(1-ζ²)
2*(ωn) √(1-ζ²)
(ωn) √(1-2ζ²)
(ωn) √(1-ζ²/2)
Answer
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Control Systems
In frequency response analysis of second order system, the error at corner frequency is
-10 logξ
20 log2ξ
-20 log2ξ
10 logξ
-10 logξ
20 log2ξ
-20 log2ξ
10 logξ
Answer
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Control Systems
The unit step error coefficient of a system with unity feedback is
1.
0.
infinity.
1/6.
1.
0.
infinity.
1/6.
Answer
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Control Systems
Weighting function is in terms of -----------------
Laplace transform of the ramp response
Laplace transform of the step response
Laplace transform of the parabolic response
Laplace transform of the impulse response
Laplace transform of the ramp response
Laplace transform of the step response
Laplace transform of the parabolic response
Laplace transform of the impulse response
Answer
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