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Control Systems
At which frequency does the Bode magnitude plots for the functions K/S2 have gain crossover frequency
ω = √K rad/sec.
ω = 0 rad/sec.
ω = K rad/sec.
ω = K2 rad/sec.
ω = √K rad/sec.
ω = 0 rad/sec.
ω = K rad/sec.
ω = K2 rad/sec.
Answer
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Force balancing equation of a dash-pot element is (where, x = displacement)
B d2x/dt2
B dx/dt
None of these
B *x
B d2x/dt2
B dx/dt
None of these
B *x
Answer
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Control Systems
A function y (t) satisfies the following differential equation : Where, δ (t) is the delta function. Assuming zero initial condition and denoting the unit step function by u(t), y(t) can be formed as
etu(t).
et.
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Control Systems
A proportional plus derivative controller
has high sensitivity
both 1 and 2
improves the steady state accuracy
increases the stability of the system
has high sensitivity
both 1 and 2
improves the steady state accuracy
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Answer
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Control Systems
Find the conditions for the system to be stable?
Gain margin is positive but phase margin is negative
Gain margin is negative but phase margin is positive
Gain margin and phase margins are positive
Gain margin and phase margins are negative
Gain margin is positive but phase margin is negative
Gain margin is negative but phase margin is positive
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Answer
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Control Systems
The system function N(s) = V(s)/I(s) = (s+3)/(4s+5). The system is initially at rest. If the excitation i(t) is a unit step, which of the following is the final value?
1
0
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1
0
3/5
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Answer
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