What is pole and zero in control system

Poles and Zeros of a transfer function are the frequencies for which the value of the denominator and numerator of transfer function becomes zero respectively. The values of the poles and the zeros of a system determine whether the system is stable, and how well the system performs.

1. What is the difference between poles and zero?
2. What is a pole in control?
3. What are zero and pole frequencies?

What is the difference between poles and zero?

Definition: Poles are the roots of the denominator of a transfer function. Zeros are the roots of the nominator of a transfer function.

What is a pole in control?

In control system poles and zeros defined by transfer function of any system. Zeros are the roots of numerator of given transfer function by making numerator is equal to 0. Poles are the roots of denominator of given transfer function by making. Denominator is equal to 0.

What are zero and pole frequencies?

A pole frequency corresponds to a corner frequency at which the slope of the magnitude curve decreases by 20 dB/decade, and a zero corresponds to a corner frequency at which the slope increases by 20 dB/decade.