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Robotic table wiping via whole-body trajectory optimizationand reinforcement learning

Benjie Holson
Fei Xia
Jeffrey Bingham
Jonathan Weisz
Mario Prats
Peng Xu
Sumeet Singh
Thomas Lew
Xiaohan Zhang
Yao Lu
ICRA (2022)
Google Scholar

Abstract

We propose an end-to-end framework to enablemultipurpose assistive mobile robots to autonomously wipetables and clean spills and crumbs. This problem is chal-lenging, as it requires planning wiping actions with uncertainlatent crumbs and spill dynamics over high-dimensional visualobservations, while simultaneously guaranteeing constraintssatisfaction to enable deployment in unstructured environments.To tackle this problem, we first propose a stochastic differentialequation (SDE) to model crumbs and spill dynamics and ab-sorption with the robot wiper. Then, we formulate a stochasticoptimal control for planning wiping actions over visual obser-vations, which we solve using reinforcement learning (RL). Wethen propose a whole-body trajectory optimization formulationto compute joint trajectories to execute wiping actions whileguaranteeing constraints satisfaction. We extensively validateour table wiping approach in simulation and on hardware.