Brief Robust fault-tolerant self-recovering control of nonlinear uncertain systems

  • Authors:
  • Zhihua Qu;Curtis M. Ihlefeld;Yufang Jin;Apiwat Saengdeejing

  • Affiliations:
  • School of Electrical Engineering and Computer Science, University of Central Florida, Orlando, FL 32816, USA;YA-D5, Kennedy Space Center, FL 32899, USA;School of Electrical Engineering and Computer Science, University of Central Florida, Orlando, FL 32816, USA;School of Electrical Engineering and Computer Science, University of Central Florida, Orlando, FL 32816, USA

  • Venue:
  • Automatica (Journal of IFAC)
  • Year:
  • 2003

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Abstract

In this paper, the problem of devising a fault-tolerant robust control for a class of nonlinear uncertain systems is investigated. Possible failures of the sensor measuring the state variables are considered, and a robust measure is developed to identify the stability- and performance-vulnerable failures. Based on evaluation of the robust measure, a fault-tolerant robust control will switch itself between one robust control strategy designed under normal operation and another under the faulty condition. It is shown that, under two input-to-state stability conditions, the proposed scheme guarantees not only the desired performance under normal operations but also robust stability and best achievable performance when there is a sensor failure of any kind.