Temat: Lyapunov spectrum - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Assignability of numerical characteristics of time-varying systems
Autorzy:: Babiarz, A.
Czornik, A.
Klamka, J.
Powiązania:: https://bibliotekanauki.pl/articles/201070.pdf
Data publikacji:: 2019
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: assignability
controllability
Lyapunov spectrum
linear time-varying systems
Opis:: The main aim of this article is to survey and discuss the existing state of art concerning the assignability by a feedback of numerical characteristics of linear continuous and discrete time-varying systems. Most of the results present necessary or sufficient conditions for different formulation of the Lyapunov spectrum assignability problem. These conditions are expressed in terms of various controllability types and optimalizability of the controlled systems and certain properties of the free system such as: regularity, diagonalizability, boundness away, integral separation and reducibility.
Źródło:: Bulletin of the Polish Academy of Sciences. Technical Sciences; 2019, 67, 6; 1007-1022
0239-7528
Pojawia się w:: Bulletin of the Polish Academy of Sciences. Technical Sciences
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Lyapunov function based criteria for ship rolling in random beam seas
Autorzy:: Üçer, Erdem
Powiązania:: https://bibliotekanauki.pl/articles/259700.pdf
Data publikacji:: 2019
Wydawca:: Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
Tematy:: random beam sea
wave energy spectrum
Lyapunov function
intact stability criterion
Opis:: The aim of this study is to present a Lyapunov function which can be used to derive an intact stability criterion for a ship in random beam seas. First, the mathematical model of the rolling motion of ships in random beam seas is introduced. The random wave excitation is described by a spectrum which is depended on the wave energy spectrum and the amplitude of the moment of roll. This spectrum is generated by a second order linear filter. Second, the methodology of creating a Lyapunov function is explained briefly. Then, there is outlined the way by which Lyapunov function can be used as the intact stability criterion for a ship. The proposed criterion is derived by considering the weather criteria for German naval vessels. Finally, the coherence of the boundary of safe basin obtained by Lyapunov function with the numerical results obtained by Euler-Maruyama Method is presented. From the results it can be deduced that the Lyapunov function can be used to define an intact stability criterion.
Źródło:: Polish Maritime Research; 2019, 3; 6-14
1233-2585
Pojawia się w:: Polish Maritime Research
Dostawca treści:: Biblioteka Nauki

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