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aircraft control surface failure detection and isolation using the osglr testThe performance of the orthogonal series generalized likelihood ratio (OSGLR) test in detecting and isolating commercial aircraft control surface and actuator failures is evaluated. A modification to incorporate age-weighting which significantly reduces the sensitivity of the algorithm to modeling errors is presented. The steady-state implementation of the algorithm based on a single linear model valid for a cruise flight condition is tested using a nonlinear aircraft simulation. A number of off-nominal no-failure flight conditions including maneuvers, nonzero flap deflections, different turbulence levels and steady winds were tested. Based on the no-failure decision functions produced by off-nominal flight conditions, the failure detection and isolation performance at the nominal flight condition was determined. The extension of the algorithm to a wider flight envelope by scheduling on dynamic pressure and flap deflection is examined. Based on this testing, the OSGLR algorithm should be capable of detecting control surface failures that would affect the safe operation of a commercial aircraft. Isolation may be difficult if there are several surfaces which produce similar effects on the aircraft. Extending the algorithm over the entire operating envelope of a commercial aircraft appears feasible.
Document ID
Document Type
Conference Paper
Bonnice, W. F.
(Draper (Charles Stark) Lab., Inc. Cambridge, MA, United States)
Motyka, P.
(Charles Stark Draper Laboratory, Inc. Cambridge, MA, United States)
Wagner, E.
(Draper (Charles Stark) Lab., Inc. Cambridge, MA, United States)
Hall, S. R.
(MIT Cambridge, MA, United States)
Date Acquired
August 12, 2013
Publication Date
January 1, 1986
Subject Category
Report/Patent Number
AIAA PAPER 86-2028
Funding Number(s)
Distribution Limits