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Consider a unity feedback system with forward transfer function given by

G(S)=1(s+1)(s+2)

The steady-state error in the output of the system for a unit-step input is _________ (up to 2 decimal places).

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G(s)=1(s+1)(s+2)

Steady-state error for the Unit step input is,

Ess=A1+kp

kp=lims→0⁡G(s) H(s)

kp=lims→0⁡1(s+1)(s+2)

= 12

Ess=11+12=23=0.67

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