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Control Systems

Control Systems
For the polynomial , number of roots which lie in the right half of s-plane is

 4
 1
 3
 2

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Control Systems
Consider a network function H(s) = 2(s+3)/{(s+2)(s+4)}. What is the steady state response due to step input?

 4/3
 1
 1/2
 3/4

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Control Systems
Which of the following is/are represents the lead compensator?

 (s+2)/(s+1)
 (s+5)/(s+6)
 (s+2)/(s+5)
 both 2 and 3

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Control Systems
Consider the function F(s) = ω/(s²+ω²). Where F(s) = Laplace transform of f(t). The final value of f(t) is equal to

 a value between -1 and +1
 finite constant
 infinite
 zero

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Control Systems
Number of sign changes in the entries in 1st column of Routh array denotes the no. of

 open loop zeroes in RHP.
 open loop poles in RHP.
 roots of characteristic polynomial in RHP.
 zeroes of system in RHP.

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

 ±2 db
 ±4 db
 ±3 db
 ±1 db

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