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Simultaneous localization and map building for mobile robot navigation

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2 Author(s)
Anousaki, G.C. ; Dept. of Mech. Eng., Nat. Tech. Univ. of Athens, Greece ; Kyriakopoulos, K.J.

Inexpensive ultrasonic sensors, incremental encoders, and grid-based probabilistic modeling are used for improved robot navigation in indoor environments. For model-building, range data from ultrasonic sensors are constantly sampled and a map is built and updated immediately while the robot is travelling through the workspace. The local world model is based on the concept of an occupancy grid. The world model extracted from the range data is based on the geometric primitive of line segments. For the extraction of these features, methods such as the Hough transform and clustering are utilized. The perceived local world model along with dead-reckoning and ultrasonic sensor data are combined using an extended Kalman filter in a localization scheme to estimate the current position and orientation of the mobile robot, which is subsequently fed to the map-building algorithm. Implementation issues and experimental results with the Nomad 150 mobile robot in a real-world indoor environment (office space) are presented

Published in:

Robotics & Automation Magazine, IEEE  (Volume:6 ,  Issue: 3 )