On-Demand Aerodynamics in Integrally Actuated Membranes with Feedback Control
On-Demand Aerodynamics in Integrally Actuated Membranes with Feedback Control
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DOI：
10.2514/1.j054888
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发表时间：
2017-02-01
期刊：
影响因子：
2.5
通讯作者：
Palacios, Rafael
中科院分区：
文献类型：
--
作者：
Buoso, Stefano;Palacios, Rafael
本文对整体驱动膜翼的模型简化和控制系统设计进行了数值研究。采用高保真的电-气力学模型，对低雷诺数流场与介电弹性机翼的流固耦合进行了数值模拟。然后推导了两个不同复杂程度的降阶模型。它们是基于流体和结构的全阶离散化在特征值分析和适当正交分解得到的模态振型上的投影。然后利用低阶系统设计比例-积分-导数和线性-二次-高斯反馈方案来控制机翼升力。当在全阶模型中实现时，闭环动力学与降阶模型在跟踪和抗风方面都非常吻合，证明了该方法的适用性。研究发现，本文所选择的控制律仅对由流体对流时间尺度引入的大相位延迟引起的低频扰动有效，但结果表明，介质弹性体在室外飞行中对膜翼进行气动控制具有潜力。
This paper is a numerical investigation on model reduction and control system design of integrally actuated membrane wings. A high-fidelity electroaeromechanical model is used for the simulation of the dynamic fluid-structure interaction between a low-Reynolds-number flow and a dielectric elastomeric wing. Two reduced-order models with different levels of complexity are then derived. They are based on the projection of the full-order discretization of fluid and structure on modal shapes obtained from eigenvalue analysis and proper orthogonal decomposition. The low-order systems are then used for the design of proportional-integral-derivative and linear-quadratic-Gaussian feedback schemes to control wing lift. When implemented in the full-order model, closed-loop dynamics are in very good agreement with the reduced-order model for both tracking and gust rejection, demonstrating the suitability of the approach. The control laws selected in this work were found to be effective only for low-frequency disturbances due to the large phase delay introduced by the fluid convective time scales, but results demonstrate the potential for the aerodynamic control of membrane wings in outdoor flight using dielectric elastomers.