Error Analysis 3

3. A unity feedback system has open-loop transfer function G(s). The steady-state error is zero for :

(a)  step input and type-1 G( s)
(b)  step input and type-0 G(s)
(c)  ramp input and type-1 G(s)
(d)  ramp input and type-0 G(s)

Answer : (a)

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