值得考虑的另一类信号源来源于滚动轴承的初期故障。滚动轴承的典型初期故障是内环滚道、外环滚道或滚动体本身的裂纹或腐蚀坑。一个滚动体通过这种裂纹一次便产生一个小的脉冲,这些脉冲象小鎯头的连续敲击,将能量传递到轴承座,依次以其固有频率(共振频率)进行振动,并随着机械结构的阻尼而衰减,这有些类似于敲击铜钟。(钟的减幅振荡频率仅取决于其动态特性,而不管它多少时间敲一次,或者敲击力有 Another source worth considering is the initial failure of the rolling bearing. The typical initial failure of a rolling bearing is a crack or a corrosion pit in the inner raceway, the outer raceway or the rolling elements themselves. A rolling body generates a small pulse at a time through such a crack. These pulses, like a small beater, continuously deliver energy to the bearing block, vibrate sequentially at its natural frequency (resonance frequency) and, as the mechanical structure Damping and damping, which is somewhat similar to knocking copper bell. (The damping of the clock oscillating frequency depends only on its dynamics, no matter how much time it knocks or the hitting force