Independent Blade Pitch Controller Design for a Three-Bladed Turbine Using Disturbance Accommodating Control

Research output: Contribution to conferencePaperpeer-review

15 Scopus Citations


Two independent pitch controllers (IPCs) based on the disturbance accommodating control (DAC) algorithm are designed for the three-bladed Controls Advanced Research Turbine to regulate rotor speed and to mitigate blade root flapwise bending loads in above-rated wind speed. One of the DAC-based IPCs is designed based on a transformed symmetrical-asymmetrical (TSA) turbine model, with wind disturbances being modeled as a collective horizontal component and an asymmetrical linear shear component. Another DAC-based IPC is designed based on a multiblade coordinate (MBC) transformed turbine model, with a horizontal component and a vertical shear component being modeled as step waveform disturbance. Both of the DAC-based IPCs are found via a regulation equation solved by Kronecker product. Actuator dynamics are considered in the design processes to compensate for actuator phase delay. The simulation study shows the effectiveness of the proposed DAC-based IPCs compared to a proportional-integral (PI) collective pitch controller (CPC). Improvement on rotor speed regulation and once-per-revolution and twice-per-revolution load reductions has been observed in the proposed IPC designs.

Original languageAmerican English
Number of pages6
StatePublished - 28 Jul 2016
Event2016 American Control Conference, ACC 2016 - Boston, United States
Duration: 6 Jul 20168 Jul 2016


Conference2016 American Control Conference, ACC 2016
Country/TerritoryUnited States

Bibliographical note

See NREL/CP-5000-66011 for preprint

NREL Publication Number

  • NREL/CP-5000-67054


  • DAC
  • disturbance accommodating control
  • independent pitch controller
  • IPC
  • wind turbines


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