Structural Monitoring of a Weapons Test UnitUsing Imaging Methods for Dynamic Signature Analysis

摘要

A methodology to identify structural changes in weapons systems during environmental tests is being developedat Lawrence Livermore National Laboratory. The method is coherence based and relies on comparing the'dynamic signature' response of the test article before and after an environmental test or test series. Physicalchanges in the test article result in changes in the dynamic signature and are mapped to an image matrix where acolor scale represents changes in sensor-to-sensor coherence. This methodology is convenient because it allowsan image to represent large amounts of information in a very compact form, where even subtle system changesmay be easily and quickly identified. Furthermore, comparison of the dynamic signature response data beforeand after any test event can be made on a quasi-real-time basis. This approach is particularly useful on largeand/or complex test articles where many sensors are present, and large volumes of data are generated.