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Control Systems
In signal flow graph output node is node having only------------
outgoing branches
both 1 and 2
None of these
incoming branches
outgoing branches
both 1 and 2
None of these
incoming branches
Answer
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Related Question
Control Systems
The transfer function of the control system depends on
initial conditions of input and output.
nature of the input.
nature of the output.
the system parameters alone.
initial conditions of input and output.
nature of the input.
nature of the output.
the system parameters alone.
Answer
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Control Systems
Consider a point S = -3 + j4 in the s-plane. Then for a system with the open loop transfer function ?
either 1 or 2
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
Answer
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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 = tan(Tω1)
ω1 = cot(Tω1)
Tω1 = cot(ω1)
Tω1 = tan(ω1)
ω1 = tan(Tω1)
ω1 = cot(Tω1)
Tω1 = cot(ω1)
Answer
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Control Systems
A system has poles at 0.01 Hz, 1 Hz and 80 Hz; zeros at 5 Hz, 100 Hz and 200 Hz. The approximate phase of the system response at 20 Hz is
90°
180°
-180°
-90°
90°
180°
-180°
-90°
Answer
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Control Systems
Find the conditions for the system to be stable?
Gain margin is negative but phase margin is positive
Gain margin and phase margins are positive
Gain margin is positive but phase margin is negative
Gain margin and phase margins are negative
Gain margin is negative but phase margin is positive
Gain margin and phase margins are positive
Gain margin is positive but phase margin is negative
Gain margin and phase margins are negative
Answer
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