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JRM Vol.22 No.2 pp. 140-149
doi: 10.20965/jrm.2010.p0140
(2010)

Paper:

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Robust Landmark Estimation and Unscented Particle Sampling for SLAM in Dynamic Outdoor Environment

Atsushi Sakai, Teppei Saitoh, and Yoji Kuroda

Department of Mechanical Engineering, Meiji University, 1-1-1 Higashimita, Tama-ku, Kawasaki, Kanagawa 214-8571, Japan

Received:
September 29, 2009
Accepted:
December 24, 2009
Published:
April 20, 2010
Creative Commons License
Keywords:
simultaneous localization and mapping, FastSLAM, landmark estimation, data association, unscented transformation
Abstract
In this paper, we propose a set of techniques for accurate and practical Simultaneous Localization And Mapping (SLAM) in dynamic outdoor environments. The techniques are categorized into Landmark estimation and Unscented particle sampling. Landmark estimation features stable feature detection and data management for estimating landmarks accurately, robustly, and at a low-calculation cost. The stable feature detection removes dynamic objects and sensor noise with scan subtraction, detects feature points sparsely and evenly, and sets data association parameters with landmark density. The data management calculates landmark existence probability and spurious landmarks are removed, utilizes landmark exclusivity for data association, and predicts importance weights using the observation range. Unscented particle sampling is based on Unscented Transformation for accurate SLAM. Simulation results of SLAM using our landmark estimation and experimental results of our SLAM in dynamic outdoor environments are presented and discussed. The results show that our landmark estimation decrease SLAM calculation time and maximum position error by 80% compared to conventional landmark estimation, and position estimation of SLAM with Unscented particle sampling ismore accurate than FastSLAM2.0 in dynamic outdoor environments.
Cite this article as:
A. Sakai, T. Saitoh, and Y. Kuroda, “Robust Landmark Estimation and Unscented Particle Sampling for SLAM in Dynamic Outdoor Environment,” J. Robot. Mechatron., Vol.22 No.2, pp. 140-149, 2010.
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