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Título del libro: Proceedings Of The 2010 11th International Workshop On Variable Structure Systems, Vss 2010
Título del capítulo: Uniform Second-Order Sliding Mode Observer for mechanical systems

Autores UNAM:
JAIME ALBERTO MORENO PEREZ; LEONID FRIDMAN;
Autores externos:

Idioma:
Inglés
Año de publicación:
2010
Palabras clave:

Convergence time; Finite-time convergence; Higher order; Initial conditions; Mechanical systems; Nonlinear injection; Observation errors; Second-order sliding-mode observer; Strong Lyapunov function; Uniformly bounded; Lyapunov functions; Mechanical engineering; Mechanics; Sliding mode control; Convergence of numerical methods


Resumen:

In this paper we introduce a modification to the classical Second-Order Sliding Mode Observer (SOSMO), used mainly for mechanical systems, and that consists in adding higher order nonlinear injection terms. Besides the usual finite-time convergence and exactness of the SOSMO, this new algorithm makes the convergence uniform with respect to the initial conditions, that is, the observation error reaches exactly and robustly the origin in a convergence time that is uniformly bounded above for every initial condition. The properties of the Uniform SOSMO (USOSMO) are studied using strong Lyapunov functions. © 2010 IEEE.


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