In-flight active wave cancelation with delayed-x-LMS control algorithm in a laminar boundary layer
In-flight active wave cancelation with delayed-x-LMS control algorithm in a laminar boundary layer
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DOI：
10.1007/s00348-016-2242-5
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发表时间：
2016-09
影响因子：
2.4
通讯作者：
B. Simon;N. Fabbiane;T. Nemitz;S. Bagheri;D. Henningson;S. Grundmann
中科院分区：
文献类型：
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作者：
B. Simon;N. Fabbiane;T. Nemitz;S. Bagheri;D. Henningson;S. Grundmann
这份手稿演示了延迟x-LMS（dxLMS）控制算法用于TS波消除的首次成功应用。采用单个DBD等离子体激励器对二维宽带Tollmien-Schlichting（TS）扰动进行主动波消除。实验是在安装在载人滑翔机上的层流翼手套的压力侧进行的。通过实验飞行数据、DNS和边界层稳定性分析，详细研究了该控制器的稳定性。最后，一个无模型的dxLMS操作的方法被引入到操作的控制器作为一个“黑箱”系统，它自动调整控制器的设置的基础上的一组速度测量的干扰波包。改进的dxLMS控制器在没有模型的情况下操作，并且能够适应在大气中飞行期间可能发生的变化的条件。
This manuscript demonstrates the first successful application of the delayed-x-LMS (dxLMS) control algorithm for TS-wave cancelation. Active wave cancelation of two-dimensional broadband Tollmien–Schlichting (TS) disturbances is performed with a single DBD plasma actuator. The experiments are conducted in flight on the pressure side of a laminar flow wing glove, mounted on a manned glider. The stability properties of the controller are investigated in detail with experimental flight data, DNS and stability analysis of the boundary layer. Finally, a model-free approach for dxLMS operation is introduced to operate the controller as a ‘black-box’ system, which automatically adjusts the controller settings based on a group speed measurement of the disturbance wave packets. The modified dxLMS controller is operated without a model and is able to adapt to varying conditions that may occur during flight in atmosphere.