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Title: Active Aerodynamic Load Control of Blades Using Small Flaps or Tabs.

Abstract

Abstract not provided.

Authors:
Publication Date:
Research Org.:
Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
Sponsoring Org.:
USDOE National Nuclear Security Administration (NNSA)
OSTI Identifier:
1147885
Report Number(s):
SAND2007-2822C
523236
DOE Contract Number:
AC04-94AL85000
Resource Type:
Conference
Resource Relation:
Conference: Proposed for presentation at the European Wind Energy Conference & Exhibition held May 7-10, 2007 in Milan, Italy.
Country of Publication:
United States
Language:
English

Citation Formats

Zayas, Jose R. Active Aerodynamic Load Control of Blades Using Small Flaps or Tabs.. United States: N. p., 2007. Web.
Zayas, Jose R. Active Aerodynamic Load Control of Blades Using Small Flaps or Tabs.. United States.
Zayas, Jose R. Tue . "Active Aerodynamic Load Control of Blades Using Small Flaps or Tabs.". United States. doi:. https://www.osti.gov/servlets/purl/1147885.
@article{osti_1147885,
title = {Active Aerodynamic Load Control of Blades Using Small Flaps or Tabs.},
author = {Zayas, Jose R.},
abstractNote = {Abstract not provided.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Tue May 01 00:00:00 EDT 2007},
month = {Tue May 01 00:00:00 EDT 2007}
}

Conference:
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  • Abstract not provided.
  • Prior work on active aerodynamic load control (AALC) of wind turbine blades has demonstrated that appropriate use of this technology has the potential to yield significant reductions in blade loads, leading to a decrease in wind cost of energy. While the general concept of AALC is usually discussed in the context of multiple sensors and active control devices (such as flaps) distributed over the length of the blade, most work to date has been limited to consideration of a single control device per blade with very basic Proportional Derivative controllers, due to limitations in the aeroservoelastic codes used to performmore » turbine simulations. This work utilizes a new aeroservoelastic code developed at Delft University of Technology to model the NREL/Upwind 5 MW wind turbine to investigate the relative advantage of utilizing multiple-device AALC. System identification techniques are used to identify the frequencies and shapes of turbine vibration modes, and these are used with modern control techniques to develop both Single-Input Single-Output (SISO) and Multiple-Input Multiple-Output (MIMO) LQR flap controllers. Comparison of simulation results with these controllers shows that the MIMO controller does yield some improvement over the SISO controller in fatigue load reduction, but additional improvement is possible with further refinement. In addition, a preliminary investigation shows that AALC has the potential to reduce off-axis gearbox loads, leading to reduced gearbox bearing fatigue damage and improved lifetimes.« less