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The RMS value is also known as the quadratic mean, or the root-mean-square. Along with the amplitude, it also takes the energy content of the oscillation into consideration and is the mathematical background for many characteristic values of assessment.
If the RMS is calculated to be above the oscillation velocity, this can be referred to as oscillation speed. In the RMS value, everything contributing to the oscillation is added up. The high oscillation amplitudes of an imbalance are the same as the low oscillation level of bearing damage that is just beginning to occur.
If the RMS value is measured broadly, changes in individual elements contributing to the oscillation can be masked by the averaging. The ability to detect damage early, e.g. due to defects in roller bearings, is limited.
RMS 值也被称为二次平均值，或均方根值。除了振幅，它还考虑到了振动的能量含量，是许多评估特征值的数学背景。
如果计算出的有效值高于振荡速度，这可以称为振荡速度。在有效值中，所有导致振荡的因素都被加起来。不平衡（故障）的高振荡幅度与刚开始出现的轴承损坏的低振动幅度的水平能级相同。
如果宽泛的测量 RMS 值，则导致振荡的单个元素的变化可能被平均值掩盖。发现早期损坏的能力有限，例如由于滚子轴承的缺陷。