The crest factor is defined as a the quotient derived from the peak value and the RMS value. In a sinusoidal oscillation, this factor amounts to √2. This value is also known in electrical engineering as the crest factor.
In a bearing that is operating normally, the crest factor is also approximately the value √2. If the condition of the bearing deteriorates, individual impacts affect the peak value and consequently raise the crest factor. If pronounced defects are then compounded by overall wear, the RMS value in increased further. In the worst case, the crest factor can remained unchanged or even sink again, even despite increasing damage.
波峰因数定义为从峰值和有效值值得出的商。在正弦振荡中，该系数为√2。该值在电气工程中也称为波峰因数（裕度）。
在正常运行的轴承中，波峰因数也约为 √2 。如果轴承状况恶化，个别冲击会影响峰值，从而提高波峰系数。如果明显的缺陷与整体磨损相结合，则有效值将进一步增加。在最坏的情况下，波峰因数可能保持不变，甚至再次下沉，即使损坏越来越严重。
Fig.: Relationship between the RMS value and peak value
图.: 有效值与峰值之间的关系
Information: 说明:
When a recording of the crest factor is made, the peak and RMS values should also be recorded. 记录波峰因数时，还应记录峰值和有效值。 |