Limit Cycle Oscillation Suppression Using a Closed-loop Nonlinear Active Flow Control Technique
Limit Cycle Oscillation Suppression Using a Closed-loop Nonlinear Active Flow Control Technique
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DOI：
10.1109/cdc42340.2020.9303839
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发表时间：
2020-12
期刊：
影响因子：
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通讯作者：
Krishna Bhavithavya Kidambi;W. MacKunis;A. Jayaprakash
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文献类型：
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作者：
Krishna Bhavithavya Kidambi;W. MacKunis;A. Jayaprakash
提出了一种在柔性翼型中同时实现流体流速控制和极限环振荡(LCO)抑制的非线性控制方法。所提出的控制设计基于包含翼型内流体结构相互作用(FSI)的动态模型。FSI描述了柔性结构表面的流场速度如何引起作用在结构上的流体力。在所提出的控制方法中，通过使用表面埋置的合成射流致动器来控制翼型表面附近的流场速度来控制LCO。具体地说，流场速度分布被驱动到期望的时变分布，这导致作用在翼型上的LCO稳定流体强迫函数。基于Lyapunov的稳定性分析，证明了主动流量控制系统渐近收敛于抑制LCO的LCO稳定化强迫函数。数值模拟结果验证了所提出的有源流动和液碳抑制方法的有效性。
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.