11.07.2015 Views

Lyapunovljeva analiza stabilnosti

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Definicije i pojam <strong>stabilnosti</strong>Stabilnost sustava 1. redaStabilnost nelinearnih sustava prvog redaDinamički sustav (x ∈ R)ẋ = f(x)Uvjet <strong>stabilnosti</strong>x · f(x) ≤ 0od diferencijalne forme ...x · ẋ = x · f(x)... do ”uvjeta disipativnosti”( )d 1dt 2 x2 = x · f(x) ≤ 0( )d 1dt 2 x2 = d ( ) 1 dxdx 2 x2 dt = x · ẋAko označimo: V (x) = 1 2 x2 imamo ˙V (x) ≤ 0Opća teorija sustava ( ) <strong>Lyapunovljeva</strong> <strong>analiza</strong> <strong>stabilnosti</strong> 7 / 42

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