NDLI: Adaptive workspace modeling, using regression methods, and path planning to the alternative guide of mobile robots in environments with obstacles

Content Provider	IEEE Xplore Digital Library
Author	Lazaro, J.L. Gardel, A. Mataix, C. Rodriguez, F.J. Martin, E.
Copyright Year	1999
Description	Author affiliation: Dept. de Electron., Alcala Univ., Madrid, Spain (Lazaro, J.L.)
Abstract	To carry out the navigation task starting with the information given by a sensor, an algorithm has been developed to model environments and plan the path that has to be tracked. It is capable of searching alternative routes if an obstacle has been detected, and chooses the optimal path, tracking smoothly the trajectory, without sudden variations in the robot orientation and movement. The necessary information is received as tuples of X-Z coordinates from an infrared detector, capable of sampling hundreds of points with an aperture angle of 100/spl deg/. Then, the tuples are ordered by the Z coordinate, and making use of regression methods, the object contours in the scene are modeled. Also the environment borders are detected as line segments. The number detected can be modified, so the model fits well into the environment using different granularity. It is possible to attain higher precision allowing an increase in the processing time. Once the environment is modeled, all the possible alternative trajectories are calculated to avoid the obstacles detected and reach the goal point. Those trajectories are computed and stored as cubic polynomial splines, using four reference systems to avoid impossible tracking through an intermediate point. For the case where the goal cannot be reached with a unique spline, the whole path is divided into several trajectories, joining them in the optimal point with the best orientation.
Starting Page	529
Ending Page	534
File Size	525819
Page Count	6
File Format	PDF
ISBN	0780356705
DOI	10.1109/ETFA.1999.815400
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1999-10-18
Publisher Place	Spain
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Trajectory Navigation Tracking Robot sensing systems Robot kinematics Infrared detectors Sampling methods Apertures Layout Polynomials
Content Type	Text
Resource Type	Article

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4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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