Supervisory Fault Tolerant Control Scheme based on Bumpless scheme and Dwell-time Conditions

The paper deals with the design of an active Fault Tolerant Control (FTC) strategy based on supervisory control approach for Linear Time Invariant (LTI), disturbed and uncertain systems. From a bank of pre-defined Luenberger observers, the observer that yields the smallest observation error determines the present operating mode that is used by a supervisory algorithm to select the corresponding controller. The cases of intermittent and abrupt faults are covered. A key feature of the proposed approach is the establishment of a set of conditions providing transient management and improved value of dwell-time for fault tolerant controllers possessing an integral action or unstable poles. The efficiency of the approach is demonstrated on the HiMAT benchmark (Hou et al., 2010). Copyright © 2012 IFAC