Etude d'un système d'aide à la décision : application à la définition dynamique des fonctions d'assistance d'un fauteuil électrique par l'utilisation de la réalité virtuelle

Abstract : The objective of this thesis is to formalize a methodology aiming to validate the architecture of system of assistive tools installation making for piloting of electric wheelchair. We want to give again a sufficient beginning of mobility to the onboard person, by using experiments of navigations in virtual environments. So we have to conceive a system able to find the relevant improvements to bring to the electric wheelchair. We worked out an architecture based on cycles "Experiment ? Analyze and decision-making ? Modification of the wheelchair ". This architecture contains three modules: a simulator, an evaluator, a configurator. This work is a part of the VAHM (developed in LASC) project using commercial electric wheelchairs enhanced by several sensors and a calculator. Our simulator replaces the physical part of VAHM. From the analysis of the data resulting from the experiments, we have calculated criteria representative of behaviours or/and particular situations which have occurred during navigation. We indexed as robotics engineers, the whole of the problematic situations according to several aspects. We have identified and characterized each aspect by a whole of criteria. The vector of criteria constitutes the input of a decision-making system which will indicate at exit the functionalities to be installed to improve the mobility of the patient in powered wheelchair. The base of knowledge of the decision-making system is supported by reflections, concerning the behaviours and particular situations that a handicapped person will meet during navigation. The originality of our work comes from the handicap directed application allowing to evaluate and to highlight the difficulties of a group of people with severe motor disabilities, not able to move in real worlds, by using settings in virtual environments situations. The architecture of the system let to provide solutions of assistance using an evolutionary decision-making system based on fuzzy logic
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Saber Dir. Etude d'un système d'aide à la décision : application à la définition dynamique des fonctions d'assistance d'un fauteuil électrique par l'utilisation de la réalité virtuelle. Autre. Université Paul Verlaine - Metz, 2009. Français. ⟨NNT : 2009METZ037S⟩. ⟨tel-01752662⟩

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