无人机/载机近距飞行的简化稳定性判据  

Simplified stability criteria for drone/carrier-aircraft close range flight

作　　者：胡汉东 汪文凯 江雄 司芳芳 刘福军 HU Handong;WANG Wenkai;JIANG Xiong;SI Fangfang;LIU Fujun(Beijing Aerohydrodynamic Research Center,Beijing 100011,China)

机构地区：[1]北京流体动力科学研究中心,北京100011

出　　处：《航空工程进展》2024年第4期1-9,共9页Advances in Aeronautical Science and Engineering

摘　　要：无人机蜂群密集飞行和无人机空中回收都涉及到无人机/载机在近距干扰流场中的飞行稳定性问题。针对上述应用背景,采用无人机/载机干扰气动导数模型,分析近距飞行的影响因素,采用纵向运动动力学方程,推导出其简化稳定性判据,并采用典型飞行器参数进行初步分析。通过数值仿真分析,结果表明:该简化判据反映了无人机运动稳定性与气动特性、干扰流场特性的关系,可用于相关无人机在干扰流场中飞行稳定性初步分析和设计;干扰流场中的下洗效应可使无人机出现幅值收敛较慢的短周期模态运动,增加了干扰流场中实现稳定可控飞行的难度。Both drone swarm intensive flight and drone aerial recovery involve the stability problem of drone/carrier-aircraft flight in close range interference flow field.This paper proposes an aerodynamic derivative model for drone/carrier-aircraft interference based on the above application background,simplifies the longitudinal dynamic equations,and derives the simplified stability criteria for the drone.Numerical simulation and analysis indicate that this simplified criterion reflects the relationship between the drone's motion stability,aerodynamic characteristics,and interference flow field characteristics,and can be used for preliminary analysis and design of flight stability in interference flow fields.Numerical simulation also indicate that the down-wash flow can cause the drone to have short-period motion with slower convergence of amplitude,which increases the difficulty of achieving stable and controllable flight in the interference flow field.

关 键 词：无人机/载机 运动稳定性 判据 干扰流场 气动特性 近距飞行 

分 类 号：V279[航空宇航科学与技术—飞行器设计] V212.12