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Mutual Information Control for Target Acquisition: A Method to Localize a Gas/Chemical Plume Source Using a Mobile Sensor

[+] Author Affiliations
Joseph R. Bourne, Kam K. Leang

University of Utah, Salt Lake City, UT

Paper No. DSCC2017-5283, pp. V002T21A007; 10 pages
doi:10.1115/DSCC2017-5283
From:
  • ASME 2017 Dynamic Systems and Control Conference
  • Volume 2: Mechatronics; Estimation and Identification; Uncertain Systems and Robustness; Path Planning and Motion Control; Tracking Control Systems; Multi-Agent and Networked Systems; Manufacturing; Intelligent Transportation and Vehicles; Sensors and Actuators; Diagnostics and Detection; Unmanned, Ground and Surface Robotics; Motion and Vibration Control Applications
  • Tysons, Virginia, USA, October 11–13, 2017
  • Conference Sponsors: Dynamic Systems and Control Division
  • ISBN: 978-0-7918-5828-8
  • Copyright © 2017 by ASME

abstract

This paper presents a motion control algorithm that exploits mutual information and a Bayesian filter to optimally guide a mobile robotic sensor, e.g., an unmanned aerial or ground vehicle (UAV or UGV) with a sensor, to localize an unknown target such as the source of a gas/chemical leak. Specifically, optimal feedforward inputs are found such that with respect to the posterior distribution, the robot moves to minimize uncertainty. The formulation depends on the robot’s dynamics model and the sensor’s stochastic measurement model. Additionally, a utility function is defined such that the estimator’s uncertainty is minimized, i.e., the acquisition of information is maximized. The approach is applied to a single robot with three different sensor models for validation. In particular, for the chemical concentration sensor case a Gaussian plume likelihood model is assumed and simulation results show that a single robot can effectively localize the unknown source, demonstrating the effectiveness of the approach.

Copyright © 2017 by ASME

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