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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
4
6.5
5
10
4
6.5
5
10
Answer
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Related Question
Control Systems
Consider a point S = -3 + j4 in the s-plane. Then for a system with the open loop transfer function ?
S is on root locus
None of these
S is not on root locus
either 1 or 2
S is on root locus
None of these
S is not on root locus
either 1 or 2
Answer
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Control Systems
In a control system, an integrator is represented by
1 / s.
1 / s2.
s.
s2.
1 / s.
1 / s2.
s.
s2.
Answer
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Control Systems
Which of the following combinations is/are correct electrical analogous elements in force-current analogy?
Force (f) --------------------- Current (i)
Spring element (K) --------- Inverse inductance (1/L)
Velocity (v) ----------------- Voltage (V)
All of these
Force (f) --------------------- Current (i)
Spring element (K) --------- Inverse inductance (1/L)
Velocity (v) ----------------- Voltage (V)
All of these
Answer
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Control Systems
The transfer function of a plant is T(s) = 5/(s+5)(s² + 5 + 1). The second order approximation of T(s) using dominant pole concept is
1/(s+1)(s+5)
5/(s+1)(s+5)
1/(s² + 5 + 1)
5/(s² + 5 + 1)
1/(s+1)(s+5)
5/(s+1)(s+5)
1/(s² + 5 + 1)
5/(s² + 5 + 1)
Answer
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Control Systems
If the transfer function of a phase lead compensator is (s+a)/(s+b) and that of a lag compensator is (s+p)/(s+q), then which one of the following sets of conditions must be satisfied?
a < b, p < q
a > b, p > q
a > b, p < q
a < b, p >q
a < b, p < q
a > b, p > q
a > b, p < q
a < b, p >q
Answer
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