New Metrics for Characterizing Impulsive Events: Automotive Applications

PI: Alan G. haddown机构：密歇根州立大学提案#:9978777提案标题：表征脉冲事件的新度量：汽车应用摘要：这个目标资助的项目涉及检测和有意义地表征和量化嵌入信号中的脉冲事件。注意力集中在汽车工业中出现的信号上，因此，这项工作将在教师对福特汽车公司科学研究实验室的长时间访问期间进行。这项工作的主要目的是通过开发更适合表征脉冲事件的更合适的技术来改进广泛使用的基于频谱的分析工具（傅立叶级数等）。基于小波分析的新方法利用了数据压缩领域的现有技术，有效地选择了压缩信号的最佳基。因此，这项工作的关键方面是找到适当的基本函数来询问信号，以期提取实际有用的信息。初步工作将集中于从相对简单的实验室结构中收集的数据。然后，它将发展到来自汽车应用的真实数据。这项工作的意义在于，现代数学信号分析工具将被引入到一个通常采用新理论技术缓慢的领域。这些技术将针对实际应用进行定制，并将对现有问题产生直接影响，如发动机爆震、音质、吱吱声和嘎嘎声、耐撞性设计等。虽然整个过程的重点是汽车应用，但所提出的工作的更广泛的应用是巨大的。

PI: Alan G. HaddowInstitution: Michigan State UniversityProposal #: 9978777Proposal Title: New Metrics for Characterizing Impulsive Events: AutomotiveApplicationsABSTRACTThis GOALI funded project is concerned with detecting and meaningfully characterizing and quantifying impulsive events that are imbedded in signals. Attention is focused on signals that arise in the automotive industry and as such, the work will be undertaken during a prolonged faculty visit to Ford Motor Company's Science Research Laboratory. The main objective of the work is to improve on the much used spectral-based analysis tools (Fourier series, etc) by developing a more appropriate technique that is better suited to characterize impulsive events. The new approach, based on wavelet analysis, exploits existing techniques used in the field of data compression that efficiently choose a best basis for compressing signals. Thus, the key aspect of the work is to find appropriate bases functions for interrogating the signals with a view to extracting practically useful information. Preliminary work will focus on data collected from relatively simple laboratory based structures. It will then progress to real data from automotive applications. The significance of the work is that modern mathematical signal analysis tools will be introduced to an area that is often slow to adopt new theoretical techniques. The techniques will be tailored to real applications and will have immediate impact to existing problems such as engine knock, sound quality, squeak and rattle, crash worthiness design, etc. While the emphasis throughout is toward automotive applications, the broader application of the proposed work is vast.