Given a unity feedback control system below, the plant P(s) = 54/[s(s+6)]. R(s) Y(s) (a) Use the root locus method to design lead compensator C(s) = K(s+z)/(s+p) so that the damping ratio of the 2s-order closed-loop poles meet the following requirement: 1) Damping ratio of 0.707 2) 2% settling time for step response is 1 second (b) Find the steady-state error of the resultant closed-loop system for a unit ramp input. (c) Append the lead compensator based controller with a lag compensator so that the steady-state error in (b) can be reduced by 5 times.
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