A hierarchical fault tolerant architecture for an autonomous robot

Abstract

This paper presents a generic approach to specify a fault tolerant robot controller, and its implementation and validation with ROS and Gazebo. The main idea is to implement a fault tolerance strategy using a fault tree and an ordered set of recovery modules. A fault injection campaign has been carried out with a mobile autonomous robot for airport inspection using simulation with Gazebo and ROS. This successful experiment implements a safety-first strategy.