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Control Systems

Control Systems
The optimum values of damping ratio is --------------

 0 to 2
 0.3 to 0.7
 0.9 to 1.1
 0.3 to 5

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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

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

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Control Systems
A linear time invariant system has an impulse response e2t for t > 0 . If initial condition are 0 and input is e3t, the output for t > 0 is

  e3t - e2t.
  e5t.
  e2t - e3t.
  e2t + e3t.

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

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

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Control Systems
In a control system, an integrator is represented by

  s.
 1 / s2.
  1 / s.
  s2.

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Control Systems
Time constant is defined as the time taken by the response of the system to reach ----------- ?

 100% of the final value
 63% of the final value
 70.7% of the final value
 50% of the final value

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