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Control Systems

Control Systems
Find the bandwidth of the system, when rise time of the system is give as 1msec?

 350 Hz
 750 Hz
 500 Hz
 1 kHz

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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

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

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Control Systems
A second order system has peak over shoot = 50% and period of oscillations 0.2 seconds. Find the resonant frequency?

 32.16 rad/s
 31.41 rad/s
 30.63 rad/s
 29.74 ra/s

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

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Control Systems
The characteristic equation of a feedback control is 2s4 + s3 + 3s2 + 5s + 10 = 0. The no of roots in the right half of the s-plane is

 2.
 4.
 0.
 3.

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

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