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State Estimate of Wind Turbine Blades Using Geometrically Exact Beam Theory

  • Stuart G. Taylor
  • Darby J. Luscher
  • Michael D. Todd
Conference paper
Part of the Conference Proceedings of the Society for Experimental Mechanics Series book series (CPSEMS)

Abstract

As wind turbine blades fatigue, the blade’s dynamic response to loading may be expected to change. The kinematic quantities that exhibit significant changes are important for wind turbine blade operation from the perspective of measurement, estimation, and performance or even life cycle prediction. A state estimate providing accurate information on these features would lead to better estimates of remaining fatigue life and provide valuable information to the turbine control systems for the purpose of maximizing total energy output of a wind turbine system. In this work, we implement an observer for state estimation of nonlinear systems using the system Jacobian to correct the system output by updating the force input to a reference model in an iterative Newton-Raphson scheme. We apply this method to a surrogate wind turbine blade modeled using a geometrically exact beam theory to estimate its state given available measurements. LA-UR-12-25441.

Keywords

Nonlinear observer State estimation Geometrically exact beam theory Newton-Raphson 

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Copyright information

© The Society for Experimental Mechanics 2014

Authors and Affiliations

  • Stuart G. Taylor
    • 1
    • 2
  • Darby J. Luscher
    • 3
  • Michael D. Todd
    • 2
  1. 1.Engineering InstituteLos Alamos National LaboratoryLos AlamosUSA
  2. 2.Department of Structural EngineeringUniversity of California, San DiegoLa JollaUSA
  3. 3.Theoretical DivisionLos Alamos National LaboratoryLos AlamosUSA

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