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A system for which the steady state error is zero for a unit-step is of type (A) Zero (B) 1 (C)2 (D) 1 or 2 (E) none of above

User Isvara
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Answer:

(E) 1 or 2

Step-by-step explanation:

Steady state error for unit step input is given by
e_(ss)=(1)/(1+k_p) where
K_P is position error coefficient the value of
K_P is given by
k_p=\lim_(s\rightarrow 0)G(s) it will be only finite when the type of the open loop system will be 0 when the of the system will be 1 or 2 then
k_p becomes infinite and steady state error will become zero so the option (E) will be the correct answer

User Sesh
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