Human-Aware Epistemic Task Planning for Human-Robot Collaboration
Résumé
We present a novel human-aware epistemic planning framework
designed for collaborative human-robot interactions,
specially tailored for situations where the agents’ shared execution
experiences can be interrupted by the uncontrollable
nature of humans. Our objective is to generate a robot policy
that accounts for such uncontrollable behaviors, thus enabling
the anticipation of potential progress achieved by the
robot when the experience is not shared, e.g., when humans
are briefly absent from the shared environment to complete a
subtask. But this anticipation is considered from the perspective
of humans who keep an estimated robot’s model. As a
first step to address it, we propose a general planning framework
and build a solver based on AND/OR search which integrates
knowledge reasoning; this includes assessing situations
by perspective taking. Our approach dynamically models
and manages the expansion or contraction of potential
worlds while tracking whether or not agents share the task execution
experiences. This helps the planner (or the robot) to
prepare itself with a set of worlds that humans would consider
possible. The robot assesses the situation from the human
perspective and removes the worlds that it has reason to think
are impossible. However, there might still be an impossible
world that is indistinguishable from the real world. In different
situations, thanks to our planning framework, the robot’s
policy built offline can determine an appropriate course of action,
such as answering human queries, explicitly communicating
some fact without being annoying, or taking appropriate
action in the presence of the human to help them narrow
down the possibilities further, facilitating collaboration. Our
preliminary experiments show that the framework is effective
for behavior planning in different situations. We discuss the
practical issues in different problem settings.
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Licence |
Domaine public
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