Vibration Analysis, Unbalanced Single-rotor System Based On Labview

It has been proved that unbalance defect of rotor is one of the main reasons that cause the vibration of rotating machinery. So the strict dynamic balance on the rotor is needed in its manufactory and use.Now, in the field of test instruments, with computer being introduced into electronic measurement field, the virtual instruments (VI), computer acquisition test analysis instruments, was born.In order to fit the demand of dynamic balance and improve the accuracy of the measure result, this paper combine the technique of virtual instruments and the technique of digital signal processing, aimed at multi-functional flexible rotor test-bed, organize the system of unbalance vibration analysis based on graphical programming language-LabVIEW. This paper use correlation analysis to dispose the digital signal acquired through the sensors. In order to improve the accuracy of the measure results, the author utilize the Chauvenet rule to wipe off irregular peak and calculate the average of regular peak, use more times crosscorrelation analysis to restrain the affect of the unexpected signal. The author dispose the actual fiducial signal, create impulse signal needed by correlation analysis in the equal frequency with fiducial signal using the tool of LabVIEW mixed with MATLAB. The paper calculate the exactly phase of unbalance vibration to solve the essential problem in the dynamic balance, which also use several kinds of signal processing method to analyze the signal, such as, digital filter, frequency domain analysis, etc. In the end, the paper test the accuracy of the system through disposing the imitated signal generated in LabVIEW.