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Autonomous navigation of indoor mobile robots using a global ultrasonic system

Published online by Cambridge University Press:  26 November 2004

Soo-Yeong Yi  and
Byoung-Wook Choi
Soo-Yeong Yi
Affiliation:
Division of Electronics and Information Engineering, Chonbuk National University (South Korea) (Tel: +82-63-270-4283; E-mail: suylee@moak.chonbuk.ac.kr).
Byoung-Wook Choi
Affiliation:
Department of Control and Measurement Engineering, Sunmoon University (South Korea) (Tel: +82-41-530-2349; E-mail: bwchoi@sunmoon.ac.kr).
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Abstract

Autonomous navigation of an indoor mobile robot, using the global ultrasonic system, is presented in this paper. Since the trajectory error of the dead-reckoning navigation increases significantly with time and distance, the autonomous navigation system of a mobile robot requires self-localization capa-bility in order to compensate for trajectory error. The global ultrasonic system, consisting of four ultrasonic generators fixed at a priori known positions in the work space and two receivers mounted on the mobile robot, has a similar structure to the well-known satellite GPS(Global Positioning System), which is used for the localization of ground vehicles. The EKF (Extended Kalman Filter) algorithm is utilized for self-localization and autonomous navigation, based on the self-localization algorithm is verified by experiments performed in this study. Since the self-localization algorithm is efficient and fast, it is appropriate for an embedded controller of a mobile robot.

Keywords

Autonomous navigationSelf-localizationGlobal ultrasonic systemRadio frequency moduleExtended kalman filter.
Type
Research Article
Information
Robotica , Volume 22 , Issue 4 , August 2004 , pp. 369 - 374
Copyright
2004 Cambridge University Press

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