Signal enhancement for diagnostic signal analysis (rocket engines)

Two time-frequency distributions of rocket engine test data are evaluated for rocket engine health monitoring. The data is enhanced using Cadzow's (1988) signal enhancement technique based on composite property mappings. Following signal enhancement, the Wigner-Ville and Choi-Williams (1989) distributions are computed. Though the signal enhancement algorithm was able to reduce noise by 5-9 dB, on average, the time-frequency distributions were capable of discerning signal features without enhancement. Results are shown for data collected from the main combustion chamber of the Space Shuttle main engine.<<ETX>>

[1]  James A. Cadzow,et al.  Signal enhancement-a composite property mapping algorithm , 1988, IEEE Trans. Acoust. Speech Signal Process..

[2]  William J. Williams,et al.  Applications and Interpretations of Reduced Interference Time-Frequency Distributions , 1990, 1990 Conference Record Twenty-Fourth Asilomar Conference on Signals, Systems and Computers, 1990..

[3]  William J. Williams,et al.  Improved time-frequency representation of multicomponent signals using exponential kernels , 1989, IEEE Trans. Acoust. Speech Signal Process..

[4]  P. Flandrin,et al.  Improving monitoring of PWR electrical power plants 'in core' instrumentation with time-frequency signal analysis , 1989, International Conference on Acoustics, Speech, and Signal Processing,.

[5]  Boualem Boashash,et al.  Time-Frequency Signal Analysis And Synthesis The Choice Of A Method And Its Application , 1988, Optics & Photonics.

[6]  L. Cohen,et al.  Time-frequency distributions-a review , 1989, Proc. IEEE.

[7]  M. F. Griffin,et al.  Diagnostic Signal Analysis Using Rank Reduction and The Wigner Distribution , 1990, 1990 Conference Record Twenty-Fourth Asilomar Conference on Signals, Systems and Computers, 1990..