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Tactile-based active object discrimination and target object search in an unknown workspace

  • Mohsen Kaboli
  • Kunpeng Yao
  • Di Feng
  • Gordon Cheng
Article

Abstract

The tasks of exploring unknown workspaces and recognizing objects based on their physical properties are challenging for autonomous robots. In this paper, we present strategies solely based on tactile information to enable robots to accomplish such tasks. (1) An active exploration approach for the robot to explore unknown workspaces; (2) an active touch objects learning method that enables the robot to learn efficiently about unknown objects via their physical properties (stiffness, surface texture, and center of mass); and (3) an active object recognition strategy, based on the knowledge the robot has acquired. Furthermore, we propose a tactile-based approach for estimating the center of mass of rigid objects. Following the active touch for workspace exploration, the robotic system with the sense of touch in fingertips reduces the uncertainty of the workspace up to 65 and 70% compared respectively to uniform and random strategies, for a fixed number of samples. By means of the active touch learning method, the robot achieved 20 and 15% higher learning accuracy for the same number of training samples compared to uniform strategy and random strategy, respectively. Taking advantage of the prior knowledge obtained during the active touch learning, the robot took up to 15% fewer decision steps compared to the random method to achieve the same discrimination accuracy in active object discrimination task.

Keywords

Active tactile object localization Active tactile object exploration Active tactile learning 

Notes

Acknowledgements

This work is supported by the European Commission under Grant Agreements PITN-GA-2012-317488-CONTEST.

Supplementary material

Supplementary material 1 (mp4 215115 KB)

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Copyright information

© Springer Science+Business Media, LLC, part of Springer Nature 2018

Authors and Affiliations

  1. 1.Institute for Cognitive Systems, Department of Electrical and Computer EngineeringTechnische Universität MünchenMunichGermany

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