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Title: Stall Flutter Control of a Smart Blade Section Undergoing Asymmetric Limit Oscillations

Stall flutter is an aeroelastic phenomenon resulting in unwanted oscillatory loads on the blade, such as wind turbine blade, helicopter rotor blade, and other flexible wing blades. While the stall flutter and related aeroelastic control have been studied theoretically and experimentally, microtab control of asymmetric limit cycle oscillations (LCOs) in stall flutter cases has not been generally investigated. This paper presents an aeroservoelastic model to study the microtab control of the blade section undergoing moderate stall flutter and deep stall flutter separately. The effects of different dynamic stall conditions and the consequent asymmetric LCOs for both stall cases are simulated and analyzed. Then, for the design of the stall flutter controller, the potential sensor signal for the stall flutter, the microtab control capability of the stall flutter, and the control algorithm for the stall flutter are studied. Lastly, the improvement and the superiority of the proposed adaptive stall flutter controller are shown by comparison with a simple stall flutter controller.
 [1] ;  [2] ;  [3] ;  [1] ;  [3]
  1. Yangzhou Univ., Yangzhou (China). School of Hydraulic, Energy and Power Engineering
  2. Embry-Riddle Aeronautical Univ., Daytona Beach, FL (United States). Aerospace Engineering Department
  3. Univ. of Wyoming, Laramie, WY (United States). Wind Energy Center
Publication Date:
Grant/Contract Number:
SC0001261; 14KJB480006; DESC0001261
Published Article
Journal Name:
Shock and Vibration
Additional Journal Information:
Journal Volume: 2016; Journal ID: ISSN 1070-9622
Research Org:
Embry-Riddle Aeronautical Univ., Daytona Beach, FL (United States). Aerospace Engineering Department
Sponsoring Org:
USDOE Office of Science (SC)
Country of Publication:
United States
OSTI Identifier:
Alternate Identifier(s):
OSTI ID: 1254488