OPTIMAL CONTROL UNDER DISTRIBUTED SENSOR FAILURE DETECTORS.
IFAC Proceedings Series
This paper presents an extension to a new technique for sensor failure detection in optimally controlled processes, proposed by Saif and Villaseca (1986). Their detection scheme uses a bank of observers to estimate the states of the system and a quadratic function of states, namely the expression for the optimal cost at any time instant, to detect sensor failures. A simpler but more restrictive alternative to this scheme is presented along with the effect of small and known plant parameter variations on the detection technique. Using a sensitivity analysis, it is shown that it is possible to detect sensor failures in spite of small plant parameter variations without redesigning the observers and the overall control system.
Saif, M. and Villaseca, F. E.. (1987). OPTIMAL CONTROL UNDER DISTRIBUTED SENSOR FAILURE DETECTORS.. IFAC Proceedings Series (3), 407-412.