Nyquist Plot Example

Consider the following transfer function:

Transfer Function

 

Change it from “s” domain to “jw” domain:

transfer-function-jw

 

Find the magnitude and phase angle equations:

magnitude-phase

 

Evaluate magnitude and phase angle at ω= 0+ and ω = +∞

22

 

Draw the nyquist plot:

nyquist-plot21

Pay attention that connecting the “0-” to “0+” point should be done in a clock-wise motion.