Vibration signals are important state parameters for mechanical equipments’ status monitoring and fault diagnosis. In this paper, in order to overcome the limitations of the traditional vibration measurement med1ods and instrument, a new non-contacting vibration method based on ultrasonic for vibration detection in special environment was presented. The mainly researched in this paper were the ...

Article history: Received: 28.11.2014. Received in revised form: 19.3.2015. Accepted: 1.4.2015. In traditional vibration isolation and placement studies, vibration participation of foundation is often ignored, and optimizations are focused on the improvements of isolated object and isolation system. In this paper, clamped thin plate was considered as the foundation, and "machinery equipment vib...

The gearbox is a complicated rotating machinery equipment, in order to realize the gearbox fault early detection and prevention, it is the key to carry out the online diagnosis. This paper used the adaptive variable step-length natural gradient blind source separation algorithm to realize the helicopter gearbox meshing vibration signal and fault vibration signal effective separation. Through th...

DC bias will cause abnormal vibration of transformers. Aiming at such a problem, transformer vibration affected by DC bias has been studied combined with transformer core and winding vibration mechanism use multi-physical field simulation software COMSOL in this paper. Furthermore the coupling model of electromagnetic-structural force field has been established, and the variation pattern of inn...

The effect of mechanical stimulation of vibration on proliferation of cells has been studied in vitro. To apply the vibration on the cells, a piezoelectric element was attached on the outside surface of the bottom of the culture plate of six wells. The piezoelectric element was vibrated by sinusoidal alternating voltage at 1.0 MHz generated by a function generator. Three kinds of cells were use...

A finite element method is developed to treat the steady-state vibration of two axisymmetric structures—a base substructure and an attached dampersubstructure—that are driven by traveling wave excitation and that couplethrough a spatially distributed hysteretic friction interface. The base substructure is representative of a rotating brake rotor or gear, and the damper is a ring affixed to the ...

The Application of Input Shaping to a System with Varying Parameters David P. Magee, Graduate Student Dr. Wayne J. Book, Professor George W. Woodruff School of Mechanical Engineering Georgia Institute of Technology Atlanta, Georgia The original input shaping technique developed by Singer and Seering is summarized and a different definition for residual vibration is proposed. The new definition ...

Klöcker A, Gueorguiev D, Thonnard JL, Mouraux A. Peripheral vs. central determinants of vibrotactile adaptation. J Neurophysiol 115: 685–691, 2016. First published November 18, 2015; doi:10.1152/jn.00519.2015.—Long-lasting mechanical vibrations applied to the skin induce a reversible decrease in the perception of vibration at the stimulated skin site. This phenomenon of vibrotactile adaptation ...

in this study, the vibration behavior of functional graded (fg) circular and annular nanoplate embedded in a visco-pasternak foundation and coupled with temperature change is studied. the effect of in-plane pre-load and temperature change are investigated on the vibration frequencies of fg circular and annular nanoplate. to obtain the vibration frequencies of the fg circular and annular nanopla...

INTRODUCTION Nano precision instruments with nanometer resolution are susceptible to disturbance transmitted mostly from ground vibration and mechanical vibration due to movements of the measuring instrument itself. These kinds of vibrations which are submicrometer level and low frequency distract both precision and accuracy of precision instruments. Six degree of freedom active vibration isola...