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An analytical approach in dynamic calibration of strain gauge balances for aerodynamic measurements

Bighashdel, A ; Sharif University of Technology | 2018

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  1. Type of Document: Article
  2. DOI: 10.1109/JSEN.2018.2815762
  3. Publisher: Institute of Electrical and Electronics Engineers Inc , 2018
  4. Abstract:
  5. Strain gauge balances (SGBs) are efficient and accurate means of static force measurement. However, due to their inherent elastic characteristics, they lack desired performance when used in dynamic loading conditions. In this paper, a novel technique is presented that remedies their inherent weakness in measuring dynamic periodic forces. The proposed method produces a correction factor to compensate the measured loading in dynamic situations. For this purpose, first an analytical investigation is performed to determine the structural dynamic behavior of a typical SGB system via the modal approach. This analytical investigation leads to identification of the structural interference effects that occurs on the SGB output in dynamic scenarios and renders the desired validated dynamic correction factor for periodic loading correction. The proposed methodology allows for extraction of the true SGB signal and/or loading out of the complex erroneous SGB output. As a case study, a periodic loading is measured via two different balances and the results are compared with and without taking into account the correction factor. The result of this investigation demonstrates that the introduced correction factor plays a crucial role in dynamic force estimation, especially when the loading frequency approaches the natural frequencies of the balancing system structure. © 2001-2012 IEEE
  6. Keywords:
  7. Analytical solution ; Dynamic correction factor ; Modal approach ; Strain gauge ; Structural dynamics ; Aerodynamics ; Dynamic loads ; Force measurement ; Frequency estimation ; Loads (forces) ; Mathematical models ; Strain gages ; Strain measurement ; Wave interference ; Aerodynamic measurements ; Analytical investigations ; Dynamic correction ; Dynamic loading conditions ; Elastic characteristic ; Interference effects ; Strain gauge balances ; Loading
  8. Source: IEEE Sensors Journal ; Volume 18, Issue 9 , May , 2018 , Pages 3572-3579 ; 1530437X (ISSN)
  9. URL: https://ieeexplore.ieee.org/document/8315423