root_locus

Calculate and display the Summary of Root Locus design principles formulated by Evans.

This function returns the necessary information required to manually sketch the positive root locus (180). The root locus is a graphical control system design method. The root locus represents the possible values of the closed loop poles as the open-loop gain, K, varies from 0 to positive infinity (positive locus). MATLAB has a builtin method rlocus to graph the root locus.

rlocus(L(s)) % plot the root locus with the open-loop system L(s)

This function supplements the necessary information required to manually sketch the positive root locus such as the departure angles, arrival angles, angle of asymptotes, imaginary axis crossing values, etc. If any issue occurs with the function feel free to make a post on this along with the complete error message.

Users are also welcome to make suggestions and improvements.