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Control Systems
A unity feedback control system has an open loop transfer function G(s) = k/(s(s² + 7s + 12) The gain k for which s = -1 + j1 will lie on the root locus of the system is
10
4
6.5
5
10
4
6.5
5
Answer
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Control Systems
Weighting function is in terms of -----------------
Laplace transform of the impulse response
Laplace transform of the step response
Laplace transform of the ramp response
Laplace transform of the parabolic response
Laplace transform of the impulse response
Laplace transform of the step response
Laplace transform of the ramp response
Laplace transform of the parabolic response
Answer
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Control Systems
Which of the following is the analogous quantity for mass element in force-voltage analogy?
All of these
Resistance.
Capacitance.
Inductance.
All of these
Resistance.
Capacitance.
Inductance.
Answer
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Control Systems
None of the poles of a linear control system lie in the right half of s plane. For a bounded input, the output of this system
none of these.
always bounded.
tends to zero.
could be unbounded.
none of these.
always bounded.
tends to zero.
could be unbounded.
Answer
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Control Systems
The open loop transfer function of a unity feedback control system is given by G(s) = k/s(s+1). If gain k is increased to infinity, then damping ratio will tend to become
0.707
infinite
unity
zero
0.707
infinite
unity
zero
Answer
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Control Systems
Transfer function of zero order hold response is
(s) × (1 - est).
(1 / s) × (1 - e-st).
(1 / s) × (1 - est).
(1 / s) × e-st.
(s) × (1 - est).
(1 / s) × (1 - e-st).
(1 / s) × (1 - est).
(1 / s) × e-st.
Answer
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