A method for diagnosing component faults of jet engines is presented. It uses nonlinear gas path analysis techniques to determine the values of health parameters, with the help of a suitably formulated engine simulation model. The incentive of the method is to achieve the determination of the values of component health indices when a limited number of measured quantities is available, which do not allow the determination of all the fault indices simultaneously. A combinatorial approach is introduced, in order to circumvent the problem of the insufficient information for determining a full set of indices. After obtaining a set of possible solutions, a selection procedure is applied to isolate the ones that can give the actual fault identity. Quantification of the fault comes at a final step, when the faulty component has been identified. Different scenarios of faults on a twin spool partially mixed turbofan engine are considered in order to demonstrate the effectiveness of the method. The limitations of the method are also discussed.
Nonlinear Engine Component Fault Diagnosis From a Limited Number of Measurements Using a Combinatorial Approach
Contributed by the International Gas Turbine Institute (IGTI) of THE AMERICAN SOCIETY OF MECHANICAL ENGINEERS for publication in the ASME JOURNAL OF ENGINEERING FOR GAS TURBINES AND POWER. Paper presented at the International Gas Turbine and Aeroengine Congress and Exhibition, Amsterdam, The Netherlands, June 3–6, 2002; Paper No. 2002-GT-30031. Manuscript received by IGTI, December 2001, final revision, March 2002. Associate Editor: E. Benvenuti.
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Aretakis, N., Mathioudakis, K., and Stamatis, A. (August 15, 2003). "Nonlinear Engine Component Fault Diagnosis From a Limited Number of Measurements Using a Combinatorial Approach ." ASME. J. Eng. Gas Turbines Power. July 2003; 125(3): 642–650. https://doi.org/10.1115/1.1582494
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