Why does drawing bode plots on poles or zeros give different results?

1. How do zeros affect Bode plot?
2. What is the significance of pole and zero in control system?
3. What is the effect of pole and zero locations?

How do zeros affect Bode plot?

This is relevant because at each corner frequency, there is a change in the behavior of the Bode plot (both magnitude and phase). If the zero is real (s=B), then the corner frequency is simply w=B. If the zeros are a pair of imaginary numbers (B +/- Aj), then the corner frequency is w=sqrt(A²+B²).

What is the significance of 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.

What is the effect of pole and zero locations?

The Effect of Poles and Zeros

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.