Model-free and learning-free grasping by Local Contact Moment matching

Maxime Adjigble, Naresh Marturi, Valerio Ortenzi, Vijaykumar Rajasekaran, Peter Corke, Rustam Stolkin

Research output: Chapter in Book/Report/Conference proceedingConference contribution

13 Citations (Scopus)
327 Downloads (Pure)

Abstract

This paper addresses the problem of grasping arbitrarily shaped objects, observed as partial point-clouds, without requiring: models of the objects, physics parameters, training data, or other a-priori knowledge. A grasp metric is proposed based on Local Contact Moment (LoCoMo). LoCoMo combines zero-moment shift features, of both hand and object surface patches, to determine local similarity. This metric is then used to search for a set of feasible grasp poses with associated grasp likelihoods. LoCoMo overcomes some limitations of both classical grasp planners and learning-based approaches. Unlike force-closure analysis, LoCoMo does not require knowledge of physical parameters such as friction coefficients, and avoids assumptions about fingertip contacts, instead enabling robust contacts of large areas of hand and object surface. Unlike more recent learning-based approaches, LoCoMo does not require training data, and does not need any prototype grasp configurations to be taught by kinesthetic demonstration. We present results of real-robot experiments grasping 21 different objects, observed by a wrist-mounted depth camera. All objects are grasped successfully when presented to the robot individually. The robot also successfully clears cluttered heaps of objects by sequentially grasping and lifting objects until none remain.
Original languageEnglish
Title of host publication2018 IEEE/RSJ International Conference on Intelligent Robots and Systems (IROS)
PublisherInstitute of Electrical and Electronics Engineers (IEEE)
Pages2933-2940
Number of pages8
ISBN (Electronic)978-1-5386-8094-0, 978-1-5386-8093-3 (USB)
ISBN (Print)978-1-5386-8095-7 (PoD)
DOIs
Publication statusPublished - 7 Jan 2019

Publication series

NameIEEE International Conference on Intelligent Robots and Systems
ISSN (Print)2153-0858
ISSN (Electronic)2153-0866

Keywords

  • Grasping
  • Robots
  • Measurement
  • Grippers
  • Shape
  • Three-dimensional displays
  • Training data

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