Web-Based Control System Analysis and Design

Margin


DESCRIPTION:

The function calculates and plots the minimum gain margin, phase margin, and corresponding crossover frequencies of an SISO system. The gain margin is the factor by which the gain K can be raised before the system becomes unstable. It can be calculated from 1/G(jw), where |G(jw>)| is the magnitude at frequency w which makes the phase angle of G(jw) equal to -180 degrees.

Similarly, the phase margin is another measure which is used to indicate the stability margin of a system. It can be calculated from the phase of G(jw)-180 degrees at frequency w which makes the magnitude |G(jw)| equal to 1.0. The frequency w is then called crossover frequency.


Please select a model to represent the system:

System Model:

State-space equations
Transfer function
Zero-pole-gain representation

System Type:

Continuous-time.


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