公开(公告)号：US20120031193A1

公开(公告)日：2012-02-09

申请号：US13262450

申请日：2010-04-01

申请人： Douglas E. Adams ,  Nick A. Stites ,  Nathanael C. Yoder ,  Jonathan R. White

发明人： Douglas E. Adams ,  Nick A. Stites ,  Nathanael C. Yoder ,  Jonathan R. White

IPC分类号： G01N19/00

CPC分类号： G01M17/08 ,  G01L25/00 ,  G01M5/00

摘要： Structural health monitoring systems can be limited to a minimum number of sensors due to cost, complexity, and weight restrictions. Some embodiments described herein pertain to a load and damage identification techniques that utilize one sensor. Several passive force estimation techniques are presented. Some techniques use either the shape or the amplitude of the magnitude of the applied force in the frequency domain. Several techniques iteratively reduce an underdetermined set of equations of motion into many overdetermined systems of equations to solve for the force estimates. The techniques are shown to locate and quantify impulsive impacts with over 97% accuracy and non-impulsive impacts with at least 87% accuracy. Impacts not acting at a specific input degree of freedom are also accurately located depending on the distance away from the modeled input degrees of freedom, and damaging impact forces are quantified by making assumptions about the impulsive nature of the applied force.

摘要翻译： 由于成本，复杂性和重量限制，结构健康监测系统可以限制在最少数量的传感器。 这里描述的一些实施例涉及利用一个传感器的负载和损伤识别技术。 提出了几种被动力估计技术。 一些技术使用频域中施加的力的大小的形状或振幅。 几种技术将不确定的运动方程组迭代地减少到许多超定方程组以求解力估计。 这些技术被显示为定位和量化冲动冲击，超过97％的精度和非冲击性冲击，至少87％的精度。 取决于距离模拟输入自由度的距离，也不会在特定输入自由度下作用的影响，并且通过对所施加的力的冲击性质做出假设来量化破坏性的冲击力。