Controlled Substructure Identification for Structural Health Monitoring

用于结构健康监测的受控子结构识别

• 批准号: 0826634
• 负责人: Erik Johnson
• 金额: $ 25万
• 依托单位: University of Southern California
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2008
• 资助国家: 美国
• 起止时间: 2008-08-01 至 2012-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0826634&HistoricalAwards=false
• 关键词: Controlled; Substructure; Identification; Structural; Health

The objective of project is to develop a method for estimating structural parameters (e.g., stiffness and damping), which will facilitate monitoring of structural health and detection of damage. This research will utilize the substructure identification method for accurate damage localization. The error analysis will be conducted to indicate sources of estimation inaccuracies, thereby suggesting approaches to modify structural behavior via the utilization of structural control techniques optimally to reduce the estimation errors. The approach will accommodate lack of excitation information and large measurement noise. The research will provide easy, quick and accurate structural parameter estimation methods that can be used for significantly improved characterization of the health of structures and the detection and localization of damage, whether from acute events such as natural disasters or long-term degradation due to environment and human use and abuse.The methods developed will have applicability to mechanical and aerospace structures as well. The results will be disseminated to research community and industry through publications and conference presentations. Undergraduate and graduate students will be exposed to, and will explore, topics in structural health monitoring and structural control, preparing them to be leaders in their future careers. The results of the experiments will be used to develop a course materials for courses in structural dynamics.

该项目的目标是开发一种估计结构参数(例如，刚度和阻尼)的方法，这将有助于监测结构健康和检测损伤。本研究将利用子结构识别方法进行精确的损伤定位。将进行误差分析，以指出估计误差的来源，从而提出通过最佳地利用结构控制技术来修改结构性能的方法，以减少估计误差。该方法能够适应激励信息的缺乏和测量噪声大的问题。这项研究将提供简单、快速和准确的结构参数估计方法，可用于显著改进结构健康的表征以及损伤的检测和定位，无论是由于自然灾害等急性事件还是由于环境和人类使用和滥用而导致的长期退化。开发的方法也适用于机械和航空航天结构。研究结果将通过出版物和会议报告向研究界和产业界传播。本科生和研究生将接触并探索结构健康监测和结构控制的主题，为他们在未来的职业生涯中成为领导者做好准备。实验的结果将被用来为结构动力学课程开发课程材料。