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Pose-Based Servo Control with Soft Tactile Sensing

2020-12-04 10:14:00
Nathan F. Lepora, John Lloyd
arXiv_RO
             
Abstract

This paper describes a new way of controlling robots using soft tactile sensors: pose-based tactile servo (PBTS) control. The basic idea is to embed a tactile perception model for estimating the sensor pose within a servo control loop that is applied to local object features such as edges and surfaces. PBTS control is implemented with a soft curved optical tactile sensor (the BRL TacTip) using a convolutional neural network trained to be insensitive to shear. In consequence, robust and accurate controlled motion over various complex 3D objects is attained. First, we review tactile servoing and its relation to visual servoing, before formalising PBTS control. Then, we assess PBTS over a range of regular and irregular objects. Finally, we reflect on the relation to visual servo control and discuss how controlled soft touch gives a route towards human-like dexterity in robots. A summary video is available here this https URL

Abstract (translated)

URL

https://arxiv.org/abs/2012.02504

PDF

https://arxiv.org/pdf/2012.02504.pdf

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