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Control Systems

Control Systems
Open loop transfer function,

 all pass filter.
 band reject filter.
None of these
 band stop filter.

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Control Systems
Negative feedback in a closed loop control system

 reduces gain.
 reduces sensitivity to parameter variation.
All of these
 improves disturbance rejection.

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Control Systems
The system is initially critical damped. If the gain of the system is doubled, then it will exhibit

 critical damped characteristics.
 undamped characteristics.
 under damped characteristics.
 over damped characteristics.

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Control Systems
Which of the following combinations is/are correct electrical analogous elements in force-current analogy?

All of these
 Spring element (K) --------- Inverse inductance (1/L)
 Velocity (v) ----------------- Voltage (V)
 Force (f) --------------------- Current (i)

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Control Systems
For a unity feedback control system open loop transfer function then position error constant is

 infinity.
 0.
 40.
 20.

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Control Systems
In signal flow graph input node is node having only------------

 both 1 and 2.
 incoming branches.
None of these
 outgoing branches.

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