Fault Detection and Accommodation Testing on an F100 Engine in an F-15 Airplane

Myers, Lawrence P. and Baer-Riedhart, Jennifer L. and Maxwell, Michael D. (1985) Fault Detection and Accommodation Testing on an F100 Engine in an F-15 Airplane. Technical Report NASA TM-86735, Research Engineering, NASA Dryden Flight Research Center.

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Abstract

The fault detection and accommodation (FDA) methodology for digital engine-control systems may range from simple comparisons of redundant parameters to the more complex and sophisticated observer models of the entire engine system. Evaluations of the various FDA schemes are done using analytical methods, simulation, and limited-altitude-facility testing. Flight testing of the FDA logic has been minimal because of the difficulty of inducing realistic faults in flight. A flight program was conducted to evaluate the fault detection and accommodation capability of a digital electronic engine control in an F-15 aircraft. The objective of the flight program was to induce selected faults and evaluate the resulting actions of the digital engine controller. Comparisons were made between the flight results and predictions. Several anomalies were found in flight and during the ground test. Simulation results showed that the inducement of dual-pressure failures was not feasible since the FDA logic was not designed to accommodate these types of failures. In general, the flight results compared well with the ground tests and predictions. The techniques used to induce selected failures in the flight environment were effective in evaluating the FDA logic.

EPrint Type:	NASA Technical Memorandum
Keywords:	Digital electronic engine control (DEEC), F-15 aircraft, F100 engine, Fault detection and accommodation testing, Flight test, Sensor failures
Subjects:	(01 - 09) Aeronautics: (07) Aircraft Propulsion And Power Aircraft/Project: F-15
ID Code:	580
Deposited On:	31 January 2006
Additional Information:	15 pages. This paper was prepared as paper 85-1294 for AIAA/SAE/ASME 21st Joint Propulsion Conference, Monterey, California, July 8–10, 1985.