Modal testing and analysis of the NPS Space Truss
Contributors: Naval Postgraduate School (U.S.) 
Publisher: Naval Postgraduate School; Available from National Technical Information Service
Published: 1997
Place of publication: Monterey, Calif; Springfield, Va
Language: eng
Number of pages: 122
Description: This thesis deals with modal testing and analysis of the Naval Postgraduate School (NPS) Space Truss. A      finite element model (FEM) was developed for the truss using a MATLB program called NRLFEMI      (developed at the Nava1 Research Laboratory). Analytical predictions of the natural frequencies for this      3.76 meter by 0.35 meter precision structure were calculated using the NRLFEMI code. These calculated      natural frequencies were then compared to experimental data collected during modal testing of the truss in      the NPS dynamics and Control Laboratory. Through analysis, the predicted results of the measurements      (from the FEM) were satisfactorily correlated to the experimentally obtained results, validating the FEM      program. Additionally, a technology demonstration of Fiber Bragg Grating Sensors (FBGSs) was      performed. These laser etched, fiber optic sensors are ideally suited for real time evaluation of load, strain,      vibration, and other health monitoring functions of structures.
Notes: Thesis advisors, B.N. Agrawal, Gangbing Song.

Thesis (M.S. in Astronautical Engineering) Naval Postgraduate School, Sept. 1997.

Includes bibliographical references (p. 51-52)

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dk/dk cc:9116 03/25/98.