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Control Systems

Control Systems
Error at corner frequency ωcf of first order control system is -------

 ±2 db
 ±3 db
 ±4 db
 ±1 db

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Control Systems
When writing a transfer function which of the following loops are not valid loops?

 Self loops at output node.
 Both 1 and 2.
 Self loops at input node.
 Neither 1 nor 2.

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Control Systems
The value of gain margin of the system having G ( s )H ( s ) = 8 / ( s + 2 )3 is

 6.
 4.
 2.
  8.

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Control Systems
Which of the following statement is/are true statements?

 Type of the system is obtained from open loop transfer function
 The steady state analysis depends on type of the system
All of these
 Transient state analysis depends on order of the system

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Control Systems
The transfer function for tachometer E(S)/θ(S) is

 KS2
 K/S
 KS
 K

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Control Systems
Which of the following controller is also known as anticipatory controller?

 derivative controller
 both 1 and 3
 proportional controller
 integral controller

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