An Integrated Approach for Aircraft Engine Performance Estimation and Fault Diagnostics

Author:

Simon Donald L.1,Armstrong Jeffrey B.2

Affiliation:

1. NASA Glenn Research Center, 21000 Brookpark Road, MS 77-1, Cleveland, OH 44135

2. ASRC Aerospace Corporation, 21000 Brookpark Road, MS 500-ASRC, Cleveland, OH 44135

Abstract

A Kalman filter-based approach for integrated on-line aircraft engine performance estimation and gas path fault diagnostics is presented. This technique is specifically designed for underdetermined estimation problems where there are more unknown system parameters representing deterioration and faults than available sensor measurements. A previously developed methodology is applied to optimally design a Kalman filter to estimate a vector of tuning parameters, appropriately sized to enable estimation. The estimated tuning parameters can then be transformed into a larger vector of health parameters representing system performance deterioration and fault effects. The results of this study show that basing fault isolation decisions solely on the estimated health parameter vector does not provide ideal results. Furthermore, expanding the number of the health parameters to address additional gas path faults causes a decrease in the estimation accuracy of those health parameters representative of turbomachinery performance deterioration. However, improved fault isolation performance is demonstrated through direct analysis of the estimated tuning parameters produced by the Kalman filter. This was found to provide equivalent or superior accuracy compared to the conventional fault isolation approach based on the analysis of sensed engine outputs, while simplifying online implementation requirements. Results from the application of these techniques to an aircraft engine simulation are presented and discussed.

Publisher

ASME International

Subject

Mechanical Engineering,Energy Engineering and Power Technology,Aerospace Engineering,Fuel Technology,Nuclear Energy and Engineering

Reference21 articles.

1. A Guide to the Development of a Ground Station for Engine Condition Monitoring;Society of Automotive Engineers E-32,2005

2. Volponi, A., and Wood, B., 2005, “Engine Health Management for Aircraft Propulsion Systems,” Proceedings of the Forum on Integrated System Health Engineering and Management (ISHEM) in Aerospace, Napa, CA, November 7–10.

3. TEMPER—A Gas Path Analysis Tool for Commercial Jet Engines;ASME J. Eng. Gas Turbines Power,1994

4. Urban, L. A., 1974, “Parameter Selection for Multiple Fault Diagnostics of Gas Turbine Engines,” Proceedings of the ASME Gas Turbine Conference and Products Show, Zurich, Switzerland, March 30–April 4, ASME Paper No. 74–GT–62.

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