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One model for one frequency range : comparison of bond graph based simplification methods

Gandanegara, Grace and Sareni, Bruno and Roboam, Xavier and Dauphin-Tanguy, Geneviève One model for one frequency range : comparison of bond graph based simplification methods. (2003) In: International Conference on Bond Graph Modeling and Simulation (ICBGM’2003), 19 January 2003 - 23 January 2003 (Orlando, FL, United States).

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Abstract

Time constants of electromechanical systems are spread along a large bandwidth (from microseconds to minutes : 10⁸ ratio). This issue makes difficult their analysis and increases the simulation time all the more than a system approach is considered. When only a small time interval is observed, the influence of slow modes may be neglected and vice versa. In this framework, simplifying a model with respect to the frequency range becomes really interesting. In order to simplify the model of complex devices, two model simplification methods have been applied directly on bond graphs. The Singular Perturbation Method (SPM), based on the dynamic analysis of elements, allows one to obtain several models, each one being dedicated to a class of dynamics and being simpler than the initial model. The Model Order Reduction Algorithm (MORA) is an energy-based procedure, which allows the deduction of a simplified model by suppressing the elements that are energetically inactive. Moreover, since the energy of an element depends on the frequency of the input signals, a simplified model can be obtained for the frequency range corresponding to the input signal spectrum. A railway traction system is used as our case study to compare these methods.

Item Type:Conference or Workshop Item (Paper)
Audience (conference):International conference proceedings
Uncontrolled Keywords:
Institution:French research institutions > Centre National de la Recherche Scientifique - CNRS (FRANCE)
Université de Toulouse > Institut National Polytechnique de Toulouse - INPT (FRANCE)
Université de Toulouse > Université Toulouse III - Paul Sabatier - UPS (FRANCE)
Other partners > Ecole Centrale de Lille (FRANCE)
Laboratory name:
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Deposited By: Bruno SARENI
Deposited On:13 Sep 2013 09:04

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