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Extension and validation of a method for locating damaged members in large space trussesThe damage location approach employs the control system capabilities for the structure to test the structure and measure the dynamic response. The measurements are then used in a system identification algorithm to produce a model of the damaged structure. The model is compared to one for the undamaged structure to find regions of reduced stiffness which indicate the location of damage. Kabe's 3,4 stiffness matrix adjustment method was the central identification algorithm. The strength of his method is that, with minimal data, it preserves the representation of the physical connectivity of the structure in the resulting model of the damaged truss. However, extensive storage and computational effort were required as a result. Extension of the damage location method to overcome these problems is the first part of the current work. The central system identification algorithm is replaced with the MSMT method of stiffness matrix adjustment which was previously derived by generalizing an optimal-update secant method form quasi-Newton approaches for nonlinear optimization. Validation of the extended damage location method is the second goal.
Document ID
19890005554
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Smith, Suzanne Weaver
(Virginia Polytechnic Inst. and State Univ. Blacksburg, VA, United States)
Date Acquired
September 5, 2013
Publication Date
September 1, 1988
Publication Information
Publication: Hampton Inst., NASA/American Society for Engineering Educ
Subject Category
Spacecraft Design, Testing And Performance
Accession Number
89N14925
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
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