154 Compact Vibration Measuring System for in-vehicle Applications G. J. Stein, R. Chmúrny, V. Rosík 1 Institute of Materials and Machine Mechanics, Slovak Academy of Sciences, Račianska 75, SK 831 02 Bratislava, Slovakia, e-mail: [email protected], [email protected] 2 Institute of Measurement, Slovak Academy of Sciences, Dúbravská cesta 9, SK 841 04 Bratislava, Slovakia, e-mail: [email protected]

A real time on-line transformer vibration monitoring system based on the Labview is proposed and applied in the monitoring of abnormal vibration of transformer caused by DC bias in this paper. The monitoring of the transformer body vibration and the signal online analysis can be well performed by this system. The vibration signals of the transformer body are detected by three acceleration senso...

This paper shows a prototype of miniature compressor driven by moving magnetic linear actuator . Based on the prototype, the dynamics of the piston and the capacity of the compressor are analyzed, which include electromagnetic field and mechanical vibration behaviors. The theoretical results are compared with some experimental results, some problems are discussed for improving the miniature mac...

The detection and estimation of machine vibration multiperiodic signals of unknown periods in white Gaussian noise is investigated. New estimates for the subsignals (signals making up the received signal) and their periods are derived using an orthogonal subspace decomposition approach. The concept of exactly periodic signals is introduced. This in turn simplifies and enhances the understanding...

The purpose of this study was to determine the effect of ultrasonic vibration on the force required to remove prefabricated posts. Ninety-six extracted human canines were divided into eight groups, which were prepared and obturated with gutta-percha and either a eugenol-containing (Roth's 801 Elite) or eugenol-free (AH26) sealer. Titanium #6 Parapost XH posts were cemented with either zinc phos...

(1996) Vibration modes and acoustic noise in a four-phase switched reluctance motor. Abstruct-Acoustic noise in the switched reluctance motor (SRM) is caused primarily by the deformation of the stator lamination stack. Acoustic noise is most severe when the periodic excitation of the SRM phases excites a natural vibration mode of the stack. The natural vibration modes and frequencies of a four-...

Occupationally used high-frequency vibration is supposed to have negative effects on blood flow and muscle strength. Conversely, low-frequency vibration used as a training tool appears to increase muscle strength, but nothing is known about its effects on peripheral circulation. The aim of this investigation was to quantify alterations in muscle blood volume after whole muscle vibration--after ...