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- W137495376 abstract "Abstract Frequency based localization is a technique which locates structural flaws by monitoring changes in transfer function pole and zero frequencies. This technique has been successfully applied to isolate simulated structural flaws in a modal database representation of a spacecraft using transfer function poles and driving point zeros. However, the number of usable frequencies and, therefore, the achievable spatial resolution, was limited by high modal density and narrow excitation bandwidth. In this paper, the feasibility of improving spatial resolution by incorporating the zeros of cross transfer functions is demonstrated. The frequency based procedure was developed specifically to support structural health monitoring in an environment that is less than ideal for modal testing. For spacecraft on-orbit, testing to detect structural flaws is constrained by the limited availability of sensors and excitation sources, and by the requirement for minimal impact on mission operations. Frequency based localization is well suited for this application, since measurements of input forces and modal frequencies only arc required. This greatly reduces the requirements for sensors and data acquisition compared to localization techniques that rely on measurements of mode shapes." @default.
- W137495376 created "2016-06-24" @default.
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- W137495376 date "1992-09-01" @default.
- W137495376 modified "2023-09-25" @default.
- W137495376 title "Localization of Structural Flaws using Cross Transfer Function Zeros" @default.
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- W137495376 doi "https://doi.org/10.1016/s1474-6670(17)49686-8" @default.
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