CP5.11 A closed-loop transfer function is given by

(a) Obtain the response of the closed-loop transfer function T s( ) = Y s( )/R s( ) to a unit step input.

(b) By consecutively adding zeros at 0, − − 0.5, 1.5, and −2.5, 0, − − 0.5, 1.5, and −2.5, determine the step response. Compare the results with the step response in part (a).

What conclusions can be drawn regarding the ef

fect of adding a zero to a second-order system?

T(s): = Y(s) 1 R(s) (s+s)