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Control Systems

Control Systems
Based on relation between the arm impedances the filters can be categorized into how many types?

 3.
 4.
  2.
 Not classified at all.

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Control Systems
The input-output relationship of a linear time invariant continuous time system is given by r(t) = d²c(t)/dt² + 3 dc(t)/dt + 2 c(t) Where r(t) and c(t) are input and output respectively. What is the transfer function of the system equal to?

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

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Control Systems
If the magnitude of G(jω)H(jω) at phase crossover frequency is 0.5. Find the gain margin of the given system?

 4
 2
 0.5
 1

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Control Systems
What is the order of a closed loop control system for a plant with a transfer function equal to G(s) = k/s²(1+Ts) and with unity feedback

 2
 3
 1
 0

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Control Systems
The impulse response of a system is c(t) = -te-t + 2 e-t (t>0). Its closed loop transfer function is

 (2s+1)/s²
 (2s+2)/(s+1)²
 (2s+2)/s²
 (2s+1)/(s+1)²

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Control Systems
The system having characteristic equation is used to be an oscillator. What is the value of k?

 3
 2
 1
 4

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