Specification of Discontinuities in Hybrid Models Specification Des Discontinuites Dans Les Modeles Hybrides
نویسندگان
چکیده
Two types of discontinuities are distinguished:D andD′ discontinuities. The facilities for discontinuity specification in the combined continuous-time / discrete-event χ language are treated. Although the language consists of a relatively small number of language elements, discontinuities can be elegantly specified in many ways. This is illustrated by means of examples. D discontinuities cannot be handled by the differential algebraic equation solver used in the χ simulator. By means of techniques such as substitution, variables that cause the discontinuity can be removed. Résumé: Deux types de discontinuités se distinguent: les discontinuités D et les discontinuités D′. Les mécanismes mis en place par le langage hybride χ pour spécifier les discontinuités sont présentés. Bien que ce langage comporte un nombre limité de primitives, il fournit des mécanismes élégants et variés pour la spécification des discontinuités. Le ‘résolveur’ d’équations différentielles algébriques employé dans le simulateur n’est pas capable de traiter les discontinuités D. Des techniques telle que la substitution peuvent être employées pour éliminer les variables engendrant ces discontinuités.
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