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Motion planning with gamma-harmonic potential fields

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1 Author(s)
Masoud, A.A. ; Electr. Eng. Dept., KFUPM, Dhahran, Saudi Arabia

This paper extends the capabilities of the harmonic potential field approach to planning to cover the situation where the workspace of a robot cannot be segmented into geometrical subregions each having an attribute of its own. Instead, a task-centered, probabilistic descriptor of the workspace is used as an input. This descriptor is processed along with a goal point to yield the navigation policy. The approach is also used for planning in a cluttered environment containing a vector drift field that influences the ability of an agent to alter its state. The planner can guide the agent to a target zone, avoid clutter and marginalize the influence of drift on motion or exploit its presence in carrying out a task. The extension is based on the physical analogy with an electric current flowing in a nonhomogeneous conducting medium. Proofs of the ability of the modified approach to avoid zero-probability (definite threat) regions and converge to the goal are provided. The capabilities of the planner are demonstrated using simulation.

Published in:

Advanced Intelligent Mechatronics (AIM), 2010 IEEE/ASME International Conference on

Date of Conference:

6-9 July 2010

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