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Lecture notes - School Of Electrical & Electronic Engineering - USM

Lecture notes - School Of Electrical & Electronic Engineering - USM

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Root Locus<br />

Bode Plot<br />

Example on Root Locus<br />

Performance Specification<br />

Advantages of Bode Plot<br />

Sketching technique revisited<br />

Performance Specification<br />

example on frequency response analysis: bode plot<br />

Gain Margin:<br />

The gain margin is the number of dB that |G(jv ′ | is<br />

below 0 dB at the phase crossover frequency (phase<br />

angle φ of G(jv ′ ) = 180 ◦ . It can also be defined as the<br />

amount of the system gain that can be increase before<br />

the closed loop system becomes unstable.<br />

Phase Margin: The phase margin is the number of degrees the<br />

phase of |G(jv ′ | is above −180 ◦ at the gain crossover<br />

frequency (|G(jv ′ | = 1. It can also be defined as the<br />

angle where the phase can be increased before the<br />

closed loop system becomes unstable<br />

nasiruddin@eng.usm.my EEE 354 : STABILITY ANALYSIS TECHNIQUES

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