Quasi-Optimal Processing of Laser Doppler Vibrometer Signals
V. A. Grechikhin
National Research University (Moscow Power Engineering Institute)
GrechikhinVA@mpei.ru
Keywords: laser Doppler vibrometer, quasi-optimal estimation of the vibration amplitude, estimation error
Pages: 33-38
Abstract
A method of quasi-optimal processing of laser Doppler vibrometer (LDV) signals in the case of monoharmonic vibrations is considered. Under certain assumptions, the problem of quasi-optimal estimation of the information parameter of the LDV signal, related through a known constant multiplier to the relative amplitude of vibrations, is solved. A structure of the device for optimal estimation is proposed. Conditions of optimality of the method are given. Statistical characteristics of estimates of the relative vibration amplitude are investigated by a numerical modeling method. The error of these estimates is compared with the Rao-Kramer bounds.
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