Browse > Article
http://dx.doi.org/10.5050/KSNVN.2004.14.8.757

Optimal Placement of Strain Gauge for Vibration Measurement : Formulation and Assessment  

최창림 (경상대학교 대학원 정밀기계공학과)
양보석 (부경대학교 기계공학)
최병근 (경상대학교 기계항공공학부)
Publication Information
Transactions of the Korean Society for Noise and Vibration Engineering / v.14, no.8, 2004 , pp. 757-766 More about this Journal
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.
Keywords
Strain Gauge; Signal-to-noise Ratio; Modal Response; Mispositioning; Probability of Gauge Failure;
Citations & Related Records
연도 인용수 순위
  • Reference
1 Petrov, E. P., Vitali, R. and Haftka, R., 2000, "Optimization of Mistuned Bladed Discs Using Gradient-based Response Surface Approximations," Proc. 41st AIAA/ASME/ASCE/AHS/ ASC Structures, Structural Dynamics and Materials Conference and Exhibit, Atlanta, GA. Apr., Paper AIAA-2000-1522.
2 Yang, M. T. and Griffin, J. H., 1988, "Theory and Methodology of Optimally Measuring Vibratory strains in Closely Spaced Modes," Journal of Engineering for Gas Turbines and Power, Vol. 120, No.4, pp. 801-807.   DOI
3 Sensmeier, M. D. and Nichol K. L.. 2000, "Improved Vibration Monitoring Through Optimization of Sensor Placements," The International Gas Turbine & Aeroengine Congress and Exposition, Munich. ASME Paper 2000-GT-612. Germany.
4 Mignolet, M. P. and Choi, B. K., 2002, "Robust Optimal Positioning of strain gaugess on Blades," Turbo Expo 2002, Amsterdam, The Netherlands, Jun. 3-6, Paper 2002-GT-30454.
5 최병근, 이현섭, 양보석, Mignolet, M. P., 2002, "Position Optimization of Strain Gauge on Blades," 한국소음진동공학회 추계학술대회논문집   과학기술학회마을
6 Sensmeier, M. D. and Nichol, K. L., 1998, "Optimum Placement of Sensors for Vibration Measurements of Turbine Engin Blades," Proceedings of the 39th AIAA/ASME/ASCE/AHS/ ASC Structures, Structural Dynamics, and Materials Conference, Long Beach. AIAA Paper 98-1849. CA.
7 Choi, B. K., Jung, Y. G., Yang, B. S. and Mignolet, M. P. 2003, "Optimal Placement of Strain Gauge for Vibration Measurement," Proceeding of the 10th APVC, Gold Coast, Australia, Nov. 12-14, pp.55-62.