Global observers with finite-time and fixed-time convergence for a class of uncertain mechanical systems

This paper proposes global sliding mode observers for a class of one-degree-of-freedom mechanical systems. For the observer design, besides the usual Coriolis and centrifugal forces, we consider uncertain dry frictions and disturbances. Moreover, the system is not required to be bounded-input bounde...

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Bibliographic Details
Main Authors: Benarab, Amina, Apaza-Perez, W. Alejandro
Format: Conference Proceeding
Language:English
Subjects:
Conferences
Friction
Linear matrix inequalities
Mechanical systems
Observers
Rendering (computer graphics)
Stability analysis
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Summary:This paper proposes global sliding mode observers for a class of one-degree-of-freedom mechanical systems. For the observer design, besides the usual Coriolis and centrifugal forces, we consider uncertain dry frictions and disturbances. Moreover, the system is not required to be bounded-input bounded-state stable, rendering the observer design problem challenging. The observer design exploits the specific relationships between the inertia and Coriolis terms providing a sliding-mode observer, with global theoretically exact finite-time and fixed-time convergence to the velocities of the mechanical system. The efficiency of the proposed observer is validated through simulations on an inverted pendulum.
ISSN:2576-2370
DOI:10.1109/CDC45484.2021.9683239