Work performed under a collaborative research effort between NASA and the German Aerospace Research Establishment (DLR) is summarized. The objective is to develop and demonstrate advanced technology for system identification of future large space structures. Recent experiences using the eigensystem realization algorithm (ERA) for modal identification of Mini-Mast are reported. Mini-Mast is a 20-meter-long deployable space truss used for structural dynamics and active-vibration control research at the NASA Langley Research Center. Due to nonlinearities and numerous local modes, modal identification of Mini-Mast proved to be surprisingly difficult. Methods available with ERA for obtaining detailed, high-confidence results are illustrated.
Modal Identification of a Deployable Space Truss
1990
22 pages
Report
Keine Angabe
Englisch
Manned Spacecraft , Unmanned Spacecraft , Large space structures , Spacecraft control , Structural vibration , Trusses , Dynamic structural analysis , Modal response , System identification , Vibration mode , Algorithms , Dynamic control , Dynamic response , International cooperation , Nastran , Space stations
Modal identification of a deployable space truss
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