17 April 2013 Structural dynamic characterization of small-scale multipurpose payloads using conventional and fiber optic sensors
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Abstract
Structural dynamic characterization is important for ensuring reliability and operability of spacecraft payloads in harsh environments. During the launch, a structure experiences dynamic loads, including acoustic excitation. Conventional sensors are used to infer structural dynamic characteristics. Limitations of conventional strain sensors include low frequency band, susceptibility to electro-magnetic interference, and use of multiple wires. To mitigate these deficiencies, an innovative fiber optic strain measurement system is considered to obtain strain distribution at specific locations on a payload. Theoretical models are suggested and compared with results of experimental testing. Limitations of analytical models are discussed and comparisons with numerical models are presented. The research addresses the usability of presented models in determining the dynamic response of a payload and variation due to distribution of components. It is proposed that discussed experimental and theoretical procedures can be used in determining structural performance for a variety of missions.
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Rebecca Clemens, Andrei Zagrai, Jon Schlavin, Vahid Sotoudeh, Richard J. Black, Joey Costa, Levy Oblea, Fereydoun Faridian, Behzad Moslehi, Justin M. Oliveira, "Structural dynamic characterization of small-scale multipurpose payloads using conventional and fiber optic sensors", Proc. SPIE 8695, Health Monitoring of Structural and Biological Systems 2013, 869511 (17 April 2013); doi: 10.1117/12.2014404; https://doi.org/10.1117/12.2014404
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