Fairing reasearch of magnetic hysteresis loop based on spline function
SUN Feifei1 , WAN Yi1, SONG Mingda2 , WANG Guisen1
(1.Key Laboratory of Highefficiency and Clean Mechanical Manufacture, School of Mechanical Engineering, Shandong University, Jinan 250061, China; 2.Shandong Special Equipment Inspection Institute, Jinan 250101, China)
 

Abstract: Aiming at the problem of the hysteresis loop appearing singularity when stress status of ferromagnetic materials is measured by using pulse method, a fairing method of magnetic hysteresis loop based on spline function was proposed. Firstly, by analyzing the principle and method of pulse measurement of magnetic properties, a hysteresis loop smoothing spline interpolation theory model was established. Then, the smoothing processing program module was writen in LabVIEW and added to the computer in the whole daemon. Finally, different ferromagnetic workpieces were tested and the corresponding hysteresis loop was acquired. The results indicate that the smooth transition is realized of the hysteresis loop in the discharge area.
Key words: hysteresis loop; LabVIEW; spline interpolation; fairing