一种连翼飞行器气动和飞行力学迭代仿真方法

根据连翼布局飞行器气动力和力矩的分布特点，建立了面向其气动部件的飞行力学数学模型。将计算流体力学(CFD)和飞行力学仿真结合，采用时间步长离散，建立了一个能通过气动计算和飞行力学相互迭代来完成仿真全过程的面向连翼布局飞行器气动部件的仿真平台，并且在仿真过程中能全程监测所有部件的气动、动力学、姿态和航迹参数的变化。通过该仿真平台对不同输入信号作用下的动力学响应分析了连翼布局飞行器纵向和横侧向的动力学特性。仿真分析结果表明:该连翼布局飞行器纵向具备静稳定性，但横侧向不具备静稳定性。同时，横向和航向运动耦合明显，符合荷兰滚运动偏航及侧滑振荡明显的主要特征。所提方法可为了解连翼布局飞行器本体及飞行动力学响应特性、飞行品质和飞行安全研究等工作提供分析基础。 

Aerodynamic and flight dynamic iterative simulation method of a joined wing aircraft

An aerodynamic component-oriented flight dynamic model of joined wing aircraft was established based on the joined wing aircraft aerodynamic force and moment distribution characteristic, and a simulation platform is established by combining the computational fluid dynamics and flight dynamic simulation method. The entire simulation is spatially discretized with time steps, and is executed by iterating Computational Fluid Dynamics (CFD) calculation along with the above joined wing aircraft flight dynamic model at each time step. Moreover, the platform is able to output the change of variables of interest, such as aerodynamics, mechanics, attitude and the space track of all components throughout the entire simulation process. Based on the dynamic response of the platform to different input signals, the longitudinal and lateral dynamic characteristics of the joined wing aircraft are analyzed. The simulation results show that the joined wing aircraft is longitudinally stable, but is not laterally stable. Lateral and directional motion couple clearly, and the yaw and side slip motion oscillations are in line with the main characteristics of the Dutch roll. The developed platform can provide a useful guideline for investigating the ontology system model, flight quality, flight safety analysis and flight dynamic response characteristics of the joined wing aircraft.