ON-LINE SENSOR FAULT DETECTION SYSTEM FOR A SMART WHEELCHAIR

This paper presents a set of results on the design and on the experimental validations of a Sensor Fault Detection System (SFDS) for a smart wheelchair to prevent simples navigation sensor faults and hence to reduce the risk of safety hazards. The design has been performed by the Structural Analysis technique which uses graph theory to determine which redundancy exists in the sensory system and thus shows the possibility to detect and handle the navigation sensor faults. The considered navigation sensor equipment includes odometric, gyroscopic and laser range measures. The experimental tests have been developed by a smart wheelchair equipped with a navigation system.