SENSOR FAILURE DETECTION IN OPTIMALLY CONTROLLED SYSTEMS.
Proceedings of the American Control Conference
A scheme for solving the sensor failure detection, isolation and accommodation (FDIA) problem in optimally controlled linear systems is presented. The technique uses Luenberger observers with a detection logic based on the minimum values of the cost functional at any time instant. The advantages of this technique are: (1) it can detect and isolate as many failed sensors as there are sensors, even when the failures are multiple and simultaneous; (2) FDIA can be accomplished at any time, since it does not depend on the convergence of the observer estimates to the convergence of the observer estimates to the actual system states; (3) it is not applications dependent, since it requires neither a priori information concerning likely failure modes nor the knowledge of the nominal path resulting from a specific input command. The method assumes the system is observable from each available output.
Saif, M. and Villaseca, F. E.. (1986). SENSOR FAILURE DETECTION IN OPTIMALLY CONTROLLED SYSTEMS.. Proceedings of the American Control Conference, 2104-2110.