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A motion strategy for exploration driven by an automaton activating feedback-based controllers

  • Edgar Martinez
  • Guillermo Laguna
  • Rafael Murrieta-CidEmail author
  • Hector M. Becerra
  • Rigoberto Lopez-Padilla
  • Steven M. LaValle
Article
  • 47 Downloads

Abstract

This paper addresses the problem of exploring an unknown, planar, polygonal and simply connected environment. To explore the environment, the robot follows the environment boundary. In the first part of this paper, we propose a motion policy based on simple sensor feedback and a complete exploration strategy is represented as a Moore machine. The proposed motion policy is based on the paradigm of avoiding the state estimation; there is a direct mapping from observation to control. We present the theoretical conditions guaranteeing that the robot discovers the largest possible region of the environment. In the second part of the paper, we propose an automaton that filters spurious observations to activate feedback-based controllers. We propose a practical control scheme whose objective is to maintain a desired distance between the robot and the boundary of the environment. The approach is able to deal with imprecise robot’s observations and controls, and to take into account variations in the robot’s velocities. The control scheme switches controllers according to observations obtained from the robots sensor. Our control scheme aims to maintain the continuity of angular and linear velocities of the robot in spite of the switching between controllers. All the proposed techniques have been implemented and both simulations and experiments in a real robot are presented.

Keywords

Exploration Combinatorial filters Feedback controllers Nonholonomic constraints 

Notes

Supplementary material

Supplementary material 1 (mp4 11190 KB)

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© Springer Science+Business Media, LLC, part of Springer Nature 2019

Authors and Affiliations

  1. 1.Centro de Investigación en MatemáticasCIMATGuanajuatoMexico
  2. 2.Iowa State UniversityAmesUSA
  3. 3.CIATECLeónMexico
  4. 4.Faculty of Information Technology and Electrical EngineeringUniversity of OuluOuluFinland

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