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TECHNICAL PAPERS

Design of Controls to Attenuate Loads in the Controls Advanced Research Turbine

[+] Author and Article Information
Alan D. Wright

National Renewable Energy Laboratory, 1617 Cole Blvd., Golden, CO 80401

Mark J. Balas

Department of Aerospace Engineering Science, University of Colorado at Boulder, Boulder, CO 80309-0429

J. Sol. Energy Eng 126(4), 1083-1091 (Nov 18, 2004) (9 pages) doi:10.1115/1.1792654 History: Received January 15, 2004; Revised June 02, 2004; Online November 18, 2004
Copyright © 2004 by ASME
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References

Figures

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The Controls Advanced Research Turbine (CART)
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CART rotor aerodynamic torque versus blade pitch angle for various wind speeds
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Test wind applied to CART FAST models
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Simulated generator speed using controls designed from the three- and five-state models, simulated with blade first flap
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Simulated generator speed with DAC controller designed from three- and five-state models
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Simulated drive-train torque using controls designed from three-state model to add low and high damping to drive-train
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FAST simulated CART tower-top fore-aft deflection with turbulent inflow using DAC control to add high and low damping to tower fore-aft motion
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Simulated pitch rates using DAC control designed from seven-state model excited by turbulent inflow
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Simulated pitch rates, showing reduced pitch rates when generator torque control is used to add drive train damping
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Simulated CART electrical power, showing effects of using generator torque control
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Simulated generator speed and blade pitch, using independent blade pitch DAC designed from five-state model
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Simulated blade flap displacement excited by wind shear for old and new DAC independent blade pitch controller
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Simulated generator speed, using DAC designed from nine-state model, excited by turbulence
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Power spectral density of simulated tower-top fore-aft displacement, using DAC designed from nine-state model excited by turbulence
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Power spectral density of simulated blade-tip flap displacement, using DAC designed from nine-state model excited by turbulence
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Power spectral density of simulated shaft torque, using DAC designed from nine-state model excited by turbulence
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Simulated blade pitch rates for original gains and reduced gains using DAC designed from nine-state model

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