Understanding pole-zero map and bode plot relationship

Hi,

What does x and y axis in pole-zero map show , i mean real axis and imaginary axes. how to read grid lines 0.1 thru 0.9 and vertical curved grid 0.1π/T etc.

Answer 1

[Star Strider]

The pole-zero plot shows the position of the poles and zeros in the complex plane. If you plotted this with surf (and you can, it just takes a few lines of code and an understanding of how to use the complex variables as (x,y) coordinates, such that the x corresponds to real values and y corresponds to imaginary values), it would appear as a continuous surface with ‘peaks’ at the poles and zero at the zeros. The Bode plot is a ‘slice’ of this surf plot where the real part is equal to zero, and the imaginary frequency axis is greater than or equal to zero. (Note that this description applies only to continuous s-space representations.)