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System and method for monitoring health of airfoils

  • US 8,718,953 B2
  • Filed: 04/28/2011
  • Issued: 05/06/2014
  • Est. Priority Date: 04/28/2011
  • Status: Active Grant
First Claim
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1. A method for monitoring the health of a rotating blade, comprising:

  • selecting an appropriate wavelet based upon a signal representative of delta times of arrival corresponding to a rotating blade;

    selecting a final decomposition level;

    generating approximation coefficients and detailed coefficients utilizing a multi-resolution analysis technique and said appropriate wavelet until the final decomposition level is achieved;

    equating the detailed coefficients to zero; and

    generating a reconstructed signal from the approximation coefficients;

    wherein the reconstructed signal is representative of static deflection in the rotating blade, andwherein the multi-resolution analysis technique comprises a plurality of decomposition levels and each of said decomposition levels comprises at least one low pass filter and at least one high pass filter to generate the approximation coefficients and the detailed coefficients, respectively.

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