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TECHNICAL PAPERS

Trend Shift Detection in Jet Engine Gas Path Measurements Using Cascaded Recursive Median Filter With Gradient and Laplacian Edge Detector

[+] Author and Article Information
Ranjan Ganguli

Department of Aerospace Engineering, Indian Institute of Science, Bangalore 560003, India

Budhadipta Dan

Department of Engineering Physics, Indian Institute of Technology, Mumbai 400076, India

J. Eng. Gas Turbines Power 126(1), 55-61 (Mar 02, 2004) (7 pages) doi:10.1115/1.1635400 History: Received July 01, 2002; Revised March 01, 2003; Online March 02, 2004
Copyright © 2004 by ASME
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References

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Figures

Grahic Jump Location
Ideal, noisy, and cascaded recursive median filtered signal for ΔEGT
Grahic Jump Location
Ideal, noisy, and cascaded recursive median filtered for ΔWF
Grahic Jump Location
Ideal, noisy, and cascaded recursive median filtered signal for ΔN1
Grahic Jump Location
Ideal, noisy, and cascaded recursive median filtered signal for ΔN2
Grahic Jump Location
Noisy signal with outliers at k=5 and k=15 along with cascaded recursive median filtered signal and exponential average filtered signal
Grahic Jump Location
A schematic view of trend shift detection algorithm
Grahic Jump Location
Absolute value of gradient for ideal, noisy, and cascaded recursive median filtered signal in Fig. 3
Grahic Jump Location
Laplacian of ideal, noisy, and cascaded recursive median filtered signal in Fig. 3
Grahic Jump Location
Missed detections and false alarms for trend shift detection with varying values of threshold on ΔEGT
Grahic Jump Location
Missed detections and false alarms for trend shift detection with varying values of threshold on ΔWF
Grahic Jump Location
Missed detections and false alarms for trend shift detection with varying values of threshold on ΔN1
Grahic Jump Location
Missed detections and false alarms for trend shift detection with varying values of threshold on ΔN2

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