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Your search keyword '"Normand-Cyrot, Dorothee"' showing total 122 results
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122 results on '"Normand-Cyrot, Dorothee"'

2. Quaternion-based attitude stabilization via discrete-time IDA-PBC

Author

Mattioni, Mattia, Moreschini, Alessio, Monaco, Salvatore, and Normand-Cyrot, Dorothée

Subjects
Electrical Engineering and Systems Science - Systems and Control
Abstract

In this paper, we propose a new sampled-data controller for stabilization of the attitude dynamics at a desired constant configuration. The design is based on discrete-time interconnection and damping assignment (IDA) passivity-based control (PBC) and the recently proposed Hamiltonian representation of discrete-time nonlinear dynamics. Approximate solutions are provided with simulations illustrating performances.

Published
2022

3. Station-keeping of $L_2$ halo orbits under sampled-data model predictive control

Author

Elobaid, Mohamed, Mattioni, Mattia, Monaco, Salvatore, and Normand-Cyrot, Dorothée

Subjects
Electrical Engineering and Systems Science - Systems and Control
Abstract

The paper deals with the design of an improved model predictive control scheme for achieving station-keeping in a quasi Halo orbit around the $L_2$ point in the Earth-Moon system. The improvement is obtained thanks to a multi-rate sampled-data trajectory planner that allows for simplifying the optimization problem of the model predictive controller while guaranteeing feasibility and convergence to the desired orbit. The multi-rate planner is designed based on a simplified model of the dynamics under a preliminary nonlinear regulation feedback. The proposed control scheme is shown to outperform recent station-keeping nonlinear model predictive control designs both in terms of tracking error and energy expenditures in different situations. Finally, a brief study of aspects pertaining to computational time are carried out so highlighting the possibility for real time implementation on modern hardware.

Published
2022

5. On feedback passivation under sampling

Author

Mattioni, Mattia, Moreschini, Alessio, Monaco, Salvatore, and Normand-Cyrot, Dorothée

Subjects
Electrical Engineering and Systems Science - Systems and Control
Abstract

In this paper we show that feedback passivation under sampling can be preserved under digital control through the redefinition of a passifying output map which depends on the sampling period. The design is constructive and approximate solutions make sense. The procedure is applied to port Hamiltonian dynamics and Interconnection and Damping Assignment feedback. Performances are illustrated over the gravity pendulum example.

Published
2021

16. Dirac Structures for a Class of Port-Hamiltonian Systems in Discrete Time

Author

Moreschini, Alessio, Monaco, Salvatore, and Normand-Cyrot, Dorothee

Abstract

This article discusses the Dirac structure and the state-space representation of a class of port-Hamiltonian systems that evolve in discrete time. The characterization of the underlying Dirac structure depends on separating the stored energy associated with the system into two distinct components. Moreover, it is shown that power-preserving interconnection and negative output feedback maintain the port-Hamiltonian structure while increasing the dimension of the Dirac structure. Finally, the proposed approach is illustrated by means of an approximated gravity pendulum model.

Published
2024
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29. Multirate Sampling and Zero Dynamics: from linear to nonlinear

Author

Monaco, Salvatore, Normand-Cyrot, Dorothée, Byrnes, Christopher I., editor, Amari, S.-I., editor, Anderson, B. D. O., editor, Åström, Karl Johan, editor, Aubin, Jean-Pierre, editor, Banks, H. T., editor, Baras, John S., editor, Bensoussan, A., editor, Burns, John, editor, Chen, Han-Fu, editor, Davis, M. H. A., editor, Fleming, Wendell, editor, Fliess, Michel, editor, Glover, Keith, editor, Hinrichsen, Diederich, editor, Isidori, Alberto, editor, Jakubczyk, B., editor, Kimura, Hidenori, editor, Krener, Arthur J., editor, Kunita, H., editor, Kurzhansky, Alexandre, editor, Kushner, Harold J., editor, Lindquist, Anders, editor, Manitius, Andrzej, editor, Martin, Clyde F., editor, Mitter, Sanjoy, editor, Picci, Giorgio, editor, Pshenichnyj, Boris, editor, Sussmann, H. J., editor, Tarn, T. J., editor, Tikhomirov, V. M., editor, Varaiya, Pravin P., editor, Willems, Jan C., editor, Wonham, W. M., editor, and Kurzhansky, Alexander B., editor

Published
1991
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34. From chronological calculus to exponential representations of continuous and discrete-time dynamics: a lie-algebraic approach

Author

Monaco, Salvatore, Normand-Cyrot, Dorothee, and Califano, Claudia

Subjects
Differential equations -- Properties, Discrete-time systems -- Design and construction, Calculus -- Research
Abstract

In this paper, formal exponential representations of the solutions to nonautonomous nonlinear differential equations are derived. It is shown that the chronological exponential admits an ordinary exponential representation, the exponent being given by an explicitly computable Lie series expansion. The results are then used to describe controlled dynamics, dynamics under sampling and forced discrete-time dynamics. The study emphasizes the role of Lie algebra techniques in nonlinear control theory and specifies structural similarities between nonautonomous differential equations, dynamics under sampling and forced discrete-time dynamics up to hybrid ones. Index Terms--Chronological calculus, discrete-time and sampled dynamics, nonantonomous differential equations, nonlinear systems.

Published
2007

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