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TECHNICAL PAPERS: Gas Turbines: Controls, Diagnostics, and Instrumentation

Interpretation of Weighted-Least-Squares Gas Path Analysis Results

[+] Author and Article Information
D. L. Doel

GE Aircraft Engines, One Neumann Way, Evendale, OH 45215-6301e-mail: dave.doel@ae.ge.com

J. Eng. Gas Turbines Power 125(3), 624-633 (Aug 15, 2003) (10 pages) doi:10.1115/1.1582492 History: Received December 01, 2001; Revised March 01, 2002; Online August 15, 2003
Copyright © 2003 by ASME
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References

Urban, L. A., 1972, “Gas Path Analysis Applied to Turbine Engine Condition Monitoring,” AIAA/SAE Paper 72-1082.
Doel,  D. L., 1994, “TEMPER—A Gas-Path Analysis Tool for Commercial Jet Engines,” ASME J. Eng. Gas Turbines Power, 116, pp. 82–89.
Volponi, A. J., 1982, “A Large Measurement Error Recovery Algorithm for Gas Turbine Module Performance Analysis,” Hamilton Standard Report No. 3430.
Doel,  D. L., 1994, “An Assessment of Weighted-Least-Squares Based Gas Path Analysis,” ASME J. Eng. Gas Turbines Power, 116, pp. 366–373.
Bryson, A. E., Jr., and Ho, Y. C., 1975, Applied Optimal Control, Hemisphere, Washington, DC, Chap. 12.
Zwillinger, D., ed., 1996, Standard Mathematical Tables and Formulae, 30th Ed., CRC Press, Boca Raton, FL, Chap. 7.2.
Palmer, C. A., 1998, “Combining Bayesian Belief Networks with Gas Path Analysis for Test Cell Diagnostics and Overhaul,” ASME Paper 98-GT-168.

Figures

Grahic Jump Location
Sample TEMPER output  
Grahic Jump Location
Response to pure 1% HPT efficiency fault
Grahic Jump Location
Response to faults & measurement errors
Grahic Jump Location
Chi-squared distribution for 8 to 12 degrees-of-freedom

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