Plot Nyquist Didatic软件

A very simple function to understand Cauchy’s argument principle and Nyquist Stability Criterion with 4 preprogrammed contours.

软件应用简介

A very simple function to understand Cauchy’s argument principle and Nyquist Stability Criterion with 4 preprogrammed contours.

The are four preprogrammed contours given by the variable “op”.

‘ret’; pts = [x0,y0, x1,y1]; % The vertices of a rectangle

‘circle’; pts = [R, xc,yc]; % The radius and center of a circle

‘ny_base’; pts = [R, xc,yc]; % The radius of a right semicircle and its center

‘ny_desv’; pts = [R, xc,yc, epsilon]; % ‘nybase’ with a semicircle detour of radius epsilon.

Each preprogrammed contour is presented in four different colors and linestyles, enabling a fast understanding of the direction of the contour

and the relationship between the contour in the s-plane and transformed one in the F(s)-plane.

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