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논문 기본 정보

자료유형
학술저널
저자정보
Loh, Chin-Hsiung (Department of Civil Engineering, National Taiwan University) Huang, Yu-Ting (Department of Civil Engineering, National Taiwan University) Hsiung, Wan-Ying (Department of Civil Engineering, National Taiwan University) Yang, Yuan-Sen (Department of Civil Engineering, National Taipei University of Technology) Loh, Kenneth J. (Department of Structural Engineering, University of California at San Diego)
저널정보
테크노프레스 Wind & structures Wind & structures 제21권 제6호
발행연도
2015.1
수록면
677 - 691 (15page)

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In this study, the geometrical setup of a turbine blade is tracked. A research-scale rotating turbine blade system is setup with a single 3-axes accelerometer mounted on one of the blades. The turbine system is rotated by a controlled motor. The tilt and rolling angles of the rotating blade under operating conditions are determined from the response measurement of the single accelerometer. Data acquisition is achieved using a prototype wireless sensing system. First, the Rodrigues' rotation formula and an optimization algorithm are used to track the blade rolling angle and pitching angles of the turbine blade system. In addition, the blade flapwise natural frequency is identified by removing the rotation-related response induced by gravity and centrifuge force. To verify the result of calculations, a covariance-driven stochastic subspace identification method (SSI-COV) is applied to the vibration measurements of the blades to determine the system natural frequencies. It is thus proven that by using a single sensor and through a series of coordinate transformations and the Rodrigues' rotation formula, the geometrical setup of the blade can be tracked and the blade flapwise vibration frequency can be determined successfully.

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