基于NAF-FxLMS控制器的垂尾抖振主动控制

将加速度负反馈(negative acceleration feedback,NAF)控制器与最小均方自适应滤波(filtered-x least mean square,FxLMS)算法相结合,提出了一种改进的反馈式次级通道阻尼补偿方法,来提高FxLMS控制器的性能。针对垂尾模型低阶模态抖振响应的控制问题,设计NAF控制器对次级通道进行反馈式阻尼补偿,建立了多模态的NAF-FxLMS控制器,随后开展垂尾抖振响应主动控制的地面模拟实验。实验结果表明,相比于单独的FxLMS控制器或NAF控制器,NAF-FxLMS控制器对垂尾抖振响应具有更好的控制效果。

NAF-FxLMS controller for vertical tail buffeting active control

In order to improve the performance of a vertical tail buffeting active control system,a negative acceleration feedback(NAF)controller was combinedly used with the filtered-x least mean square(FxLMS)algorithm,and an improved feedback secondary path damping compensation method was proposed.Aiming at the control of vertical tail low order mode buffeting responses,the NAF controller was designed to compensate the damping of the secondary path,and a multi-mode NAF-FxLMS controller was established.Then the active control ground experiment for suppressing vertical tail buffeting responses was carried out.The experimental results show that the NAF-FxLMS controller has better control effect on the vertical tail buffeting response suppression than the individual FxLMS controller or NAF controller.