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arXiv · 2109.05668

UMPNet: Universal Manipulation Policy Network for Articulated Objects

Zhenjia Xu·Zhanpeng He·Shuran Song
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Abstract

We introduce the Universal Manipulation Policy Network (UMPNet) -- a single image-based policy network that infers closed-loop action sequences for manipulating arbitrary articulated objects. To infer a wide range of action trajectories, the policy supports 6DoF action representation and varying trajectory length. To handle a diverse set of objects, the policy learns from objects with different articulation structures and generalizes to unseen objects or categories. The policy is trained with self-guided exploration without any human demonstrations, scripted policy, or pre-defined goal conditions. To support effective multi-step interaction, we introduce a novel Arrow-of-Time action attribute that indicates whether an action will change the object state back to the past or forward into the future. With the Arrow-of-Time inference at each interaction step, the learned policy is able to select actions that consistently lead towards or away from a given state, thereby, enabling both effective state exploration and goal-conditioned manipulation. Video is available at https://youtu.be/KqlvcL9RqKM

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Zhenjia Xu, Zhanpeng He, Shuran Song. 2021-09-13. UMPNet: Universal Manipulation Policy Network for Articulated Objects. https://doi.org/10.1109/lra.2022.3142397

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