IMPROVED TECHNIQUES FOR DETERMINATION OF RESIDUES AND DAMPING FROM FREQUENCY AND IMPULSE RESPONSE CURVES | ||
| The International Conference on Applied Mechanics and Mechanical Engineering | ||
| Article 2, Volume 1, 1st Conference on Applied Mechanical Engineering., May 1984, Pages 11-20 PDF (1.92 M) | ||
| Document Type: Original Article | ||
| DOI: 10.21608/amme.1984.48579 | ||
| Author | ||
| KAI V. SORENSEN | ||
| M. SC., Bruel & Kjr, Denmark. | ||
| Abstract | ||
| This paper describes the determination of modal parameters directly from the frequency and impulse response curves, and discusses the factors ef-fecting the accuracy of the measurements. It summarizes the effects of noise, weighting functions, resolution bias and excitation methods. A new technique, based on the Hilbert transform of the impulse response is described. The technique is used to obtain a large dynamic range of time , signals on a logarithmic axis and is shown used for determination of damp-. ing from the envelope of the impulse response and for separation of modes in the time domain. | ||
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