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CONTROL SYSTEMS

Control Systems
The open loop transfer function of a unity feedback control system is given by G(s) = k/s(s+1). If the gain k is increased to infinity, then damping ratio will tend to become

 zero
 infinite
 unity
 0.707

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Control Systems
A proportional plus derivative controller

 both 1 and 2
 has high sensitivity
 improves the steady state accuracy
 increases the stability of the system

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Control Systems
Which one of the following is the response y(t) of a casual LTI system described by H(s) = (s+1)/(s²+2s+2) for a given input x(t) = e-t u(t)?

 e-t tant*u(t)
 e-t cott*u(t)
 e-t sint*u(t)
 e-t cost*u(t)

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Control Systems
Which one of the following is the steady state error for a step input applied to a unity feedback system with the open loop transfer function G(s) = 10/(s²+14s+50)?

 1
 0
 infinite
 0.83

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Control Systems
A proportional plus integral controller

 it increases rise time
 has high sensitivity
 both 2 and 3
 increases the stability of the system

ANSWER DOWNLOAD EXAMIANS APP
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