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Lecture notes - School Of Electrical & Electronic Engineering - USM

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Root Locus<br />

Bode Plot<br />

Example on Root Locus<br />

cont. solution to example<br />

Advantages of Bode Plot<br />

Sketching technique revisited<br />

Performance Specification<br />

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

It is to remind that K = 2.39 is the critical gain or the gain which<br />

cause the system to be marginally stable.<br />

In a manner similar to that employed in continuous-time<br />

systems, the frequency of oscillation at K = 2.39 can be found<br />

from the w 2 row of the array. We may obtain the auxillary<br />

equation as such,<br />

(1 − 0.0381)w 2 + 0.924K| K=2.39 = 0.9089w 2 + 2.181 = 0<br />

or<br />

√<br />

2.181<br />

w = ±j<br />

0.9089 = ±j1.549<br />

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

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