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

Journal Article · Fri Jan 01 00:00:00 EST 2016 · Shock and Vibration

DOI:https://doi.org/10.1155/2016/5096128· OSTI ID:1242556

Li, Nailu ^[1]; Balas, Mark J. ^[2]; Nikoueeyan, Pourya ^[3]; Yang, Hua ^[1]; Naughton, Jonathan W. ^[3]

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1. School of Hydraulic, Energy and Power Engineering, Yangzhou University, Yangzhou, Jiangsu 225127, China
2. Aerospace Engineering Department, Embry-Riddle Aeronautical University, Daytona Beach, FL 32114-3900, USA
3. Wind Energy Center, University of Wyoming, Laramie, WY 82072, USA

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.

• Research Organization: Embry-Riddle Aeronautical Univ., Daytona Beach, FL (United States). Aerospace Engineering Department
• Sponsoring Organization: USDOE Office of Science (SC)
• Grant/Contract Number: DESC0001261; SC0001261; 14KJB480006
• OSTI ID: 1242556
• Alternate ID(s): OSTI ID: 1254488
• Journal Information: Shock and Vibration, Journal Name: Shock and Vibration Vol. 2016; ISSN 1070-9622
• Publisher: Hindawi Publishing Corporation
• Country of Publication: Egypt
• Language: English

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