margin

PURPOSE

MARGIN Finds gain and phase margins and crossover frequencies.

SYNOPSIS

function [Gm,Pm,Wg,Wp] = margin(varargin)

DESCRIPTION

MARGIN Finds gain and phase margins and crossover frequencies.

   Usage: [GM, PM, WG, WP] = MARGIN(G)
          [GM, PM, WG, WP] = MARGIN(MAG, PH, W)

          where GM, PM   - gain and phase margins,
                WG, WP   - corresponding crossover frequencies,
                G        - fractional-order transfer function,
                MAG,PH,W - magnitude, phase and frequency vectors.

CROSS-REFERENCE INFORMATION

This function calls:

bode BODE Bode frequency response of fractional dynamic systems.
margin MARGIN Finds gain and phase margins and crossover frequencies.
bode BODE Plot the experimentally observed frequency-domain data.

This function is called by:

margin MARGIN Finds gain and phase margins and crossover frequencies.
fpid_optimize FPID_OPTIMIZE Obtain optimized settings for fractional PID controller
fpid_optimnlc FPID_OPTIMNLC Non-linear constraints for FPID_OPTIMIZE