%0 Journal Article
%T Diagnostics of Circular Sawblade Vibration by Displacement Sensors
%A PŁżemysl Vesely
%A Zden¨§k Kopecky
%A Zden¨§k Hejmal
%A PŁżemysl Pokorny
%J Drvna Industrija
%D 2012
%I University of Zagreb
%X The paper deals with problems of the circular sawblade vibration. In the introductory part, theoretical bases are summarized to determine the form of vibrations and critical and resonant rotational frequency. A diagnostic method is proposed for the direct measurement of amplitudes of a circular sawblade by displacement sensors with the subsequent Fast Fourier Transform (FFT) analysis. This method with the spectral analysis of a signal in the time area makes possible to determine the size and shape of vibration of a circular sawblade with respect to usability/applicability under operational conditions. Unlike standard methods, when the sawblade is excited by external sources, natural vibrations are used such as disk deformations and the dynamic unbalance of a circular sawblade, effects of chucking/gripping and machine vibration and, last but not least, the disk and sawn wood interaction.
%K circular sawblade
%K critical rotational speed
%K resonant rotational speed
%K vibration
%K Fast Fourier Transform analysis
%U http://hrcak.srce.hr/index.php?show=clanak&id_clanak_jezik=124232