Using Filter Diagonalization for Fault Detection in Low-Speed Rotational Machinery

: The paper presents the application of Filter Diagonalization (FD) method for fault detection in low-speed rotational machinery. FD serves to extract frequency components from short time signals. The length of the signal can be significantly shorter than the length required by methods based on computing the similarity between the signal and the sine wave, e.g. Fourier Transform (FT) and Wavelet Transform (WT). Brief mathematical background of the FD method is outlined along with a short comparison of its performance with respect to the FT. Finally, an example of utilization of FD for fault detection is described.