为研究组合式飞行器协调机动操纵能力,本文从连接数量和构型两个角度出发探索了组合式飞行器的机动能力变化现象,分析原因并总结出通用的规律。首先采用CFD方法建立组合体飞行器气动力数据库,导入采用准坐标形式的拉格朗日多体动力学关系得到翼尖铰接链式组合飞行器动力学模型并在各类代表性构型下求解配平问题。然后提出姿态等效体的定义并说明其作为操纵性参考基准的合理性。最后构建最优化问题,在避免诱发相对运动的约束下分别对于单体、2/3/4/5机组合体,在三类构型(水平构型、上下反构型、手风琴构型)下分别衡量纵向、横向、航向三轴最大可达等效加速度,提出变化特点解释原因,为构型选择和控制其设计提供理论依据。
To study the coordinated maneuverability of the wingtip-docking compound aircraft, this paper explores the changes in maneuverability from the perspectives of unit aircraft connection number and configuration. Firstly, a computational fluid dynamics (CFD) method is used to establish an aerodynamic database for the compound aircraft. This data is then used to develop a dynamic model of the wingtip-hinged chain-like combined aircraft, based on a quasi-coordinate form of the Lagrange multi-body dynamics. The control inputs required for trimming under various configurations have been calculated. Next, the concept of an attitude equivalent body is proposed and its reasonableness as a reference standard for maneuverability is explained. Finally, an optimization problem is constructed to evaluate the maximum attainable equivalent acceleration in the longitudinal, lateral, and yaw axes for the combination consist of 2/3/4/5 unit aircrafts, under three configurations. The study identifies characteristic changes, explains the reasons, and provides a theoretical basis for configuration selection and control law design.