基于人工神经网络的四旋翼飞行器气动噪声相同步控制研究  

Phase Synchronization Control of Aerodynamic Noise for Quadrotor Based on Artificial Neural Network

作　　者：武一帆 臧渊 吕旻昊 马锦超 WU Yi-fan;ZANG Yuan;LV Min-hao;MA Jin-chao(Wuxi Institute of Technology,Jiangsu Wuxi 214121,China)

机构地区：[1]无锡职业技术学院,江苏无锡214121

出　　处：《南昌航空大学学报（自然科学版）》2023年第2期19-26,34,共9页Journal of Nanchang Hangkong University(Natural Sciences)

基　　金：中国空气动力研究与发展中心旋翼空气动力学重点实验室研究开放课题(RAL202103-3)。

摘　　要：四旋翼飞行器的应用范围日渐扩大,其旋翼气动噪声问题也开始越来越受到重视。为降低四旋翼飞行器的噪声水平,本文提出了基于相同步控制的四旋翼飞行器气动噪声主动抑制方法。首先基于自由尾迹法建立四旋翼飞行器气动噪声物理模型;针对物理模型计算资源消耗大、无法满足控制系统实时性的难题,建立基于人工神经网络的气动噪声预测代理模型。然后以某样例四旋翼小型无人机为对象,通过仿真计算,建立不同相角组合控制作用下飞行器正前方观测点气动噪声的训练样本集;最后通过遗传算法对训练得到的代理模型进行寻优,获得噪声控制所需的最优相角控制量,从而实现对飞行器前方扇形区域的噪声主动抑制。仿真结果表明,在最优相角组合控制作用下,飞行器正前方扇形区域观测点的平均声压级可降低9dB。The aerodynamic noise problem has gained significant attention as the application domain of quadrotors rapidly expands.Based on phase synchronization control technology,this paper proposes an active noise suppression method to reduce the sound pressure generated by a single quadrotor.To begin with,a physical model based on the free-wake method is established to analyze the aerodynamic noise of the quadrotor.Furthermore,a proxy model based on artificial neural network is established to decrease the consumption of computing resource,thereby improving the real-time performance of the dynamic control system.In addition,various phase angles under combined control are introduced into calculation,while recording the noise data at observation place in front of the aircraft.A relative dataset composed of these angles is then used for simulation,taking a specific unmanned aerial vehicle as the experimental object.Finally,the genetic algorithm is employed to generate optimal phase angle for active control which can suppress noise in the fan-shaped area ahead of the quadrotor,thus optimizing the proxy model.In summary,based on the simulation results,the average sound pressure at the observation point in the fan-shaped area can be reduced by 9 dB under the active control of optimal phase angle.

关 键 词：气动声学主动控制 人工神经网络 四旋翼飞行器 相同步控制 

分 类 号：V216.54[航空宇航科学与技术—航空宇航推进理论与工程]