Confusion about poles and zeros of Lead compensator?

1. What is compensator zero?
2. Does lead compensator affect the steady state error?
3. What kind of controller is shown by the pole zero and Bode plot below?

What is compensator zero?

Pole-zero compensators are used to modify the magnitude and phase of feedback amplifier loops.

Does lead compensator affect the steady state error?

A lead compensator can increase the stability or speed of reponse of a system; a lag compensator can reduce (but not eliminate) the steady-state error. Depending on the effect desired, one or more lead and lag compensators may be used in various combinations.

What kind of controller is shown by the pole zero and Bode plot below?

Detailed Solution. The first pole zero combination (near to imaginary axis) indicated lag network and other combination indicates lead network. Hence it is a lag lead network.