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The aim of this work is to propose a methodology of sizing in a frame of the conception of mechatronic systems in particular and active dynamic ones, in general. This methodology w ill support conceptual design step [1]. We propose a collaborative design approach based on Bond Graph tool and Genetic algor ithms. Mechatronic systems have a passive part and active part. In our approach we establish a hard interaction between pa ssive and active parts. This interaction will be ma terialized in taking into account of control criteria in the evolution (synthesis) ph ase of passive part. This initiative treats functional aspects, both structural and behavioral; while respecting interactions between p assive and active parts. In our approach we treat functional, structural and behavioral aspects in order to validate a post-pro ject solution. Optimization needs Behavioral models which are systematically deducted from bond-graph structural models. Thus, retained bond graph elements which constitute passive part will be obtained, done by o ptimization Genetic Algorithms procedure. In this p rocedure Gramians of controllability and of observability represent the fitness function. The proposed method will be appli ed to an automatic transmission of a scooter and validated by a dynamic simulation.

BOND-GRAPHS AND GENETIC ALGORITHMS FOR DESIGN AND OPTIMIZATION OF ACTIVE DYNAMIC SYSTEMS