According to the application of extreme value theory,the concept of damage characteristic parameter is brought forward,and the process to compute it by the method of HHT is described.

• 随后研究了基于极值理论对多组传感器损伤特征参数值的分布进行分析从而精确损伤发生时特征参数阈值的方法,详细阐释了利用该方法进行损伤定位的过程。