Structural dynamic characterization of small-scale multipurpose payloads using conventional and fiber optic sensors
2013
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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