The open loop transfer function
G(s)=(s+1)sp(s+2)(s+3)
where p is an integer, is connected in unity feedback configuration as shown in the figure.
Given that the steady state error is zero for unit step input and is 6 for unit ramp input, the value of the parameter p is .
Steady state error of type 1 system, for step input is zero, for ramp input is 1Kv and for parabolic input is infinity.
So, the given system must be type-1 and p=1