13.07.2015 Views

Lyapunovljeva analiza stabilnosti

Lyapunovljeva analiza stabilnosti

Lyapunovljeva analiza stabilnosti

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UvodStabilnost sustava 2. redaNelinearni prigušeni oscilator (1)Dinamički model nelinearnog prigušenog oscilatora (1)mẍ + γẋ 3 + kx 3 = 0nije mogućalinearizacija!!!Energija nelinearnog prigušenog oscilatora (1)E(x, ẋ) = 1 2 mẋ2 + 1 4 kx4Disipacija energije linearnog prigušenog oscilatoradE(x, ẋ)dt= mẋẍ + kx 3 ẋ = (mẍ + kx 3 ) ẋ = −γẋ 4} {{ }−γẋ 3Kriterij <strong>stabilnosti</strong>m > 0, γ > 0, k > 0Josip Kasać ( ) Stabilnost nelinearnih sustava 17 / 33

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