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Vibration-based identification of rotating blades using Rodrigues' rotation formula from a 3-D measurement
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  • Journal title : Wind and Structures
  • Volume 21, Issue 6,  2015, pp.677-691
  • Publisher : Techno-Press
  • DOI : 10.12989/was.2015.21.6.677
 Title & Authors
Vibration-based identification of rotating blades using Rodrigues' rotation formula from a 3-D measurement
Loh, Chin-Hsiung; Huang, Yu-Ting; Hsiung, Wan-Ying; Yang, Yuan-Sen; Loh, Kenneth J.;
 Abstract
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.
 Keywords
signal processing;stochastic subspace identification;Rodrigues' rotation formula;wireless sensing system;a research-scale turbine blade system;
 Language
English
 Cited by
1.
Comparison of Hoek-Brown and Mohr-Coulomb failure criterion for deep open coal mine slope stability, Structural Engineering and Mechanics, 2016, 60, 5, 809  crossref(new windwow)
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