Abstract
In this study, I assume true operation and perform analysis non-linear vibration in the random input and examination. The non-linear characteristic paid attention to repulsion properties by the magnetism and produced an experimental model. I estimated a nonlinearity characteristic (soft spring) that I showed a method to estimate a non-linear characteristic statistically and the effectiveness and depended on the amplitude for by using higher order spectra(ex. Bispectrum) analysis and I showed what the characteristics to be subordinate to each other such as harmonics vibration and the fraction next vibration could grasp by bispectrum mainly on the main resonance experimentally and finally I estimated a nonlinearity parameter in this vibration system experimentally and examined the equivalent nonlinearity characteristic that considered the band in random data.
