Citation

Trieu HT, Nguyen HT, Willey K. Conf. Proc. IEEE Eng. Med. Biol. Soc. 2008; 2008: 4254-4257.

Affiliation

Faculty of Engineering, University of Technology, Sydney, Broadway, NSW 2007, Australia. thtrieu@eng.uts.edu.au

Copyright

(Copyright © 2008, IEEE (Institute of Electrical and Electronics Engineers))

DOI

10.1109/IEMBS.2008.4650149

PMID

19163652

Abstract

In this paper we present a method of shared control strategy for an intelligent wheelchair to assist a disable user in performing obstacle avoidance tasks. The system detects obstacles in front of the wheelchair using a laser range finder sensor. As the wheelchair moves the information from the laser range finder is combined with data from the encoders mounted in its driving wheels to build a 360 degrees real-time map. The accuracy of the map is improved by eliminating the systematic error that would result from both the uncertainty of effective wheelbase and unequal driving wheel diameters. The usable wheelchair accessible space is determined by including the actual wheelchair dimensions in producing the real-time map. In making a decision the shared control method considers the user's intentions via the head-movement interface, accessible space of the environment and user safety. The experiments show promising results in the intelligent wheelchair system.

Language: en