Hierarchical decision theoretic planning for navigation among movable obstacles

M Levihn, J Scholz, M Stilman - … of Robotics X: Proceedings of the Tenth …, 2013 - Springer
M Levihn, J Scholz, M Stilman
Algorithmic Foundations of Robotics X: Proceedings of the Tenth Workshop on …, 2013Springer
In this paper we present the first decision theoretic planner for the problem of Navigation
Among Movable Obstacles (NAMO). While efficient planners for NAMO exist, they are
challenging to implement in practice due to the inherent uncertainty in both perception and
control of real robots. Generalizing existing NAMO planners to nondeterministic domains is
particularly difficult due to the sensitivity of MDP methods to task dimensionality. Our work
addresses this challenge by combining ideas from Hierarchical Reinforcement Learning …
Abstract
In this paper we present the first decision theoretic planner for the problem of Navigation Among Movable Obstacles (NAMO). While efficient planners for NAMO exist, they are challenging to implement in practice due to the inherent uncertainty in both perception and control of real robots. Generalizing existing NAMO planners to nondeterministic domains is particularly difficult due to the sensitivity of MDP methods to task dimensionality. Our work addresses this challenge by combining ideas from Hierarchical Reinforcement Learning with Monte Carlo Tree Search, and results in an algorithm that can be used for fast online planning in uncertain environments. We evaluate our algorithm in simulation, and provide a theoretical argument for our results which suggest linear time complexity in the number of obstacles for typical environments.
Springer
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