Transactions of the Korean Society for Noise and Vibration Engineering (한국소음진동공학회논문집)

The Korean Society for Noise and Vibration Engineering (한국소음진동공학회)
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Optimal Placement of Strain Gauge for Vibration Measurement : Formulation and Assessment

진동측정을 위한 스트레인 게이지 설치위치 최적화 : 최적화 방법 및 평가

  • 최창림 (경상대학교 대학원 정밀기계공학과) ;
  • 양보석 (부경대학교 기계공학) ;
  • 최병근 (경상대학교 기계항공공학부)
  • Published : 2004.08.01
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Abstract

This paper focuses on the formulation and validation of an automatic strategy to select the optimal location and direction of strain gauges for the measurement of the modal response. These locations and directions are important to render the strain measurements as robust as possible when a random mispositioning of the gauges and gauge failures are expected. The approach relies on the evaluation of the signal-to-noise ratios of the gauge measurements from strain data of finite element. The multi-step optimization strategy including genetic algorithm is used to find the strain gauge locations-directions that maximize the smallest modal strain signal-to-noise ratio in the absence of gauge failure or its expected value when gauge failure is possible. A flat Plate is used to prove the applicability of the proposed methodology and to demonstrate the effects of the essential parameters of the problem such as the mispositioning level, the probability of gauge failure, and the number of gauges.

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References

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