Vibrational processing of a dynamic structural flight system: A multichannel spectral estimation approach

Journal Article · Wed Apr 29 00:00:00 EDT 2020 · Journal of the Acoustical Society of America

DOI:https://doi.org/10.1121/10.0001156· OSTI ID:1661026

Candy, J. V. ^[1]; Case, J. E. ^[1]; Fisher, K. A. ^[1]; Goodrich, T. W. ^[1]; Illingworth, B. R. ^[1]; Craft, K. W. ^[1]; Eves, K. L. ^[1]; Nikfar, R. A. ^[1]; Emmons, M. C. ^[1]

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1. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)

Dynamic testing of large flight vehicles (rockets) is not only complex, but also can be very costly. These flights are infrequent and can lead to disastrous effects if something were to fail during the flight. The development of sensors coupled to internal components offers a great challenge in reducing their size, yet still maintaining their precision. Sounding rockets provide both a viable and convenient alternative to the more costly vehicular flights. Some of the major objectives are to test various types of sensors for monitoring components of high interest as well as investigating real-time processing techniques. Signal processing presents an extreme challenge in this noisy multichannel environment. The estimation and tracking of modal frequencies from vibrating structures is an important set of features that can provide information about the components under test; therefore, high resolution multichannel spectral processing is required. Finally, the application of both single channel and multichannel techniques capable of producing reliable modal frequency estimates of a vibrating structure from uncertain accelerometer measurements is discussed.

• Research Organization: Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)
• Sponsoring Organization: USDOE National Nuclear Security Administration (NNSA)
• Grant/Contract Number: AC52-07NA27344
• OSTI ID: 1661026
• Report Number(s): LLNL-JRNL--804429; 1006724
• Journal Information: Journal of the Acoustical Society of America, Journal Name: Journal of the Acoustical Society of America Journal Issue: 4 Vol. 147; ISSN 0001-4966
• Publisher: Acoustical Society of America
• Country of Publication: United States
• Language: English

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