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- W2040339223 abstract "Tests of large structures on-orbit will be performed with measurements at a relatively few structure points. Values for the unmeasured degrees of freedom (dofs) can be estimated based on measured dofs and analytical model dynamic information. These 'expanded' mode shapes are useful for optimal-update identification and damage location as well as test/analysis correlation. A new method of expansion for test mode shape vectors is developed from the orthogonal Procrustes problem from computational linear algebra. A subspace defined by the set of measured dofs is compared to a subspace defined by mode shapes from an analytical model of the structure. The method simultaneously expands and orthogonalizes the mode shape vectors. Two demonstration problems are used to compare the new method to current expansion techniques. One demonstration uses test data from a laboratory scale-model truss structure. Performance of the new method is comparable or superior to that of the previous expansion methods which require separate orthogonalization." @default.
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- W2040339223 date "1990-04-05" @default.
- W2040339223 modified "2023-09-27" @default.
- W2040339223 title "Simultaneous expansion and orthogonalization of measured modes for structure identification" @default.
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- W2040339223 doi "https://doi.org/10.2514/6.1990-1218" @default.
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