The measured tangential force , tangential inertial force and normal vibration acceleration are decomposed using a discrete wavelet transform . the relation among these three dynamics state variables is investigated 利用小波變換技術(shù)對(duì)測量的切向力、切向慣性力和法向振動(dòng)加速度進(jìn)行分解,對(duì)這些動(dòng)力學(xué)變量之間的相互關(guān)系進(jìn)行了深層次的研究。