Mohamed Fezari

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An electronic travel aid is a form of assistive technology having the purpose of enhancing mobility for the blind. This paper describes the development of a microcontroller based navigation system for blind pedestrians. It is a portable, self contained portable electronic system that will allow visually impaired individuals to travel through familiar and(More)
Users are able to operate a joystick to control the chair, however many more severely handicapped users need some other means of controlling the wheelchair. The aim of this work is to implement an interesting application using small vocabulary word recognition processor and some sensors on a smart system. The adopted model is based on grouping a(More)
—Voice diseases are increasing dramatically, due mainly to unhealthy social habits and voice abuse. In this paper, we investigate the methods of acoustic voice analysis (AVA) with adaptive features to develop a system for voice pathologies detection, where the models correspond to classes of patients who share the same diagnostic. One essential part in this(More)
The aim of this work is to reduce the burden task on the DSP processor by transferring a parallel computation part on a configurable circuits FPGA, in automatic speech recognition module design, signal pre-processing, feature selection and optimization, models construction and finally classification phase are necessary. LMS filter algorithm that contains(More)
The faulty performance of permanent-magnet (PM) brushless dc motor drives is studied under one and simultaneous two open-switches faults conditions. This DC motor is supplied with a three phase two level six IGBT voltage source inverter. The three phases currents mean values of the DC motor are used as diagnostic indices. A knowledge algorithm is based to(More)