Robotic adversarial coverage of known environments

Roi Yehoshua, Noa Agmon, Gal A. Kaminka

Research output: Contribution to journalArticlepeer-review

26 Scopus citations

Abstract

Coverage is a fundamental problem in robotics, where one or more robots are required to visit each point in a target area at least once. Most previous work has concentrated on finding a coverage path that would minimize the coverage time. In this paper, we consider a new and more general version of the problem: adversarial coverage. Here, the robot operates in an environment that contains threats that might stop the robot. The objective is to cover the target area as quickly as possible, while minimizing the probability that the robot will be stopped before completing the coverage. This version of the problem has many real-world applications, from performing coverage missions in hazardous fields such as nuclear power plants, to surveillance of enemy forces in the battlefield and field demining. In this paper, we discuss the offline version of adversarial coverage, in which a map of the threats is given to the robot in advance. First, we formally define the adversarial coverage problem and present different optimization criteria used to evaluate coverage algorithms in adversarial environments. We show that finding an optimal solution to the adversarial coverage problem is N P -hard. We therefore suggest two heuristic algorithms: STAC, a spanning-tree-based coverage algorithm, and GAC, which follows a greedy approach. We establish theoretical bounds on the total risk involved in the coverage paths created by these algorithms and on their lengths. Lastly, we compare the effectiveness of these two algorithms in various environments and settings.

Original languageEnglish
Pages (from-to)1419-1444
Number of pages26
JournalInternational Journal of Robotics Research
Volume35
Issue number12
DOIs
StatePublished - 1 Oct 2016

Bibliographical note

Publisher Copyright:
© The Author(s) 2016.

Keywords

  • Mobile robot coverage
  • adversarial coverage
  • demining
  • path planning
  • robotics in hazardous fields

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