J
J.K. Hammond
Researcher at University of Southampton
Publications - 43
Citations - 1181
J.K. Hammond is an academic researcher from University of Southampton. The author has contributed to research in topics: Covariance & Linear filter. The author has an hindex of 15, co-authored 43 publications receiving 1131 citations.
Papers
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Journal ArticleDOI
Higher-order spectra: the bispectrum and trispectrum
TL;DR: In this article, the bispectrum and trispectrum are used to detect and analyse non-linearities in high-order spectra (HOS) and the tricoherence and kurtosis functions are extended to their fourth-order equivalents.
Journal ArticleDOI
The analysis of non-stationary signals using time-frequency methods
J.K. Hammond,Paul R. White +1 more
TL;DR: The analytical modelling of physical phenomena so as to predict theoretical time-frequency distributions, with a view to offering insight into the signal generation mechanisms, is modeled.
Journal ArticleDOI
The interpretation of the bispectra of vibration signals—: I. Theory
TL;DR: In this article, a normalised bispectral measure is used in the analysis of vibration signals containing periodic components and noise, and practical considerations regarding the choice of sampling rate are considered.
Journal ArticleDOI
Parameter estimation for hysteretic systems
M. Yar,J.K. Hammond +1 more
TL;DR: The Gauss Newton method is used in setting up a two-stage iterative least squares algorithm and the usefulness of the algorithm is validated through its application to various simulated time histories from the hysteretic model.
Journal ArticleDOI
The interpretation of the bispectra of vibration signals—: II. Experimental results and applications
TL;DR: A normalised bispectral measure is used in the analysis of vibration signals containing periodic components and noise, showing that there is potential for using these measures for machine condition monitoring.