Limit Cycle Oscillation Suppression Using a Closed-loop Nonlinear Active Flow Control Technique
| Autor: | William MacKunis, Anu Kossery Jayaprakash, Krishna Bhavithavya Kidambi |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
Lyapunov function
Physics Airfoil 0209 industrial biotechnology Computer simulation 02 engineering and technology Aerodynamics Mechanics Nonlinear control 01 natural sciences 010305 fluids & plasmas Physics::Fluid Dynamics symbols.namesake Nonlinear system 020901 industrial engineering & automation 0103 physical sciences Synthetic jet symbols Fluid dynamics |
| Zdroj: | CDC |
| DOI: | 10.1109/cdc42340.2020.9303839 |
| Popis: | This paper presents a nonlinear control method, which achieves simultaneous fluid flow velocity control and limit cycle oscillation (LCO) suppression in a flexible airfoil. The proposed control design is based on a dynamic model that incorporates the fluid structure interactions (FSI) in the airfoil. The FSI describe how the flow field velocity at the surface of a flexible structure gives rise to fluid forces acting on the structure. In the proposed control method, the LCO are controlled via control of the flow field velocity near the surface of the airfoil using surface-embedded synthetic jet actuators. Specifically, the flow field velocity profile is driven to a desired time-varying profile, which results in a LCO-stabilizing fluid forcing function acting on the airfoil. A Lyapunov-based stability analysis is used to prove that the active flow control system asymptotically converges to the LCO-stabilizing forcing function that suppresses the LCO. Numerical simulation results are provided to demonstrate the performance of the proposed active flow-and-LCO suppression method. |
| Databáze: | OpenAIRE |
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