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Control Systems

Control Systems
What is the open loop DC gain of a unity feedback control system having closed loop transfer function as

 9/4
 13/4
 4/13
 4/9

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Control Systems
Consider the following statements for phase lead compensation:

 nether 1 nor 2
 both 1 and 2
 The maximum phase lag occurs at the arithmetic mean of the two corner frequencies.
 Phase lead compensation shifts the gain crossover frequency to the right

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Control Systems
Slope of asymptote in Bode plot of 2nd order system is _____________________ per octave.

 12 dB
 18 dB
 3 dB
 6 dB

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Control Systems
A control system has open loop transfer function . Break away point is lies between

 -4 and -6.
 0 and -4.
 0 and 4.
 any of the above.

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Control Systems
If two blocks having gains A and B respectively are in series connection, find the resultant gain using block diagram reduction technique?

 A*B
 A-B
 A+B
 A/B

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Control Systems
The transfer function of the system described by d²/dt²(y(t)) + 3d/dt(y(t)) + 2y(t) = 5u(t) with u(t) as input and y(t) as output is

 5/s(s²+3s+2)
 s(s²+3s+2)/5
 (s²+3s+2)/5
 5/(s²+3s+2)

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