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随着计算能力的增强,各种仿真工具广泛应用于飞行器的概念设计。本文为固定翼无人机提出了一个基于仿真的包括气动、飞行动力学与控制的设计过程。它采用CFD进行气动特性分析和流场模拟,六自由度运动方程进行无人机数学建模,多目标遗传算法进行控制器优化设计。通过开环无人机运动分析和非线性闭环数学仿真实现对无人机气动布局和飞行控制系统的协同设计,并为飞行稳定性与控制问题提出解决方案。
With the increase of computing power, a variety of simulation tools are widely used in the conceptual design of aircraft. This paper presents a simulation-based design process for a fixed-wing UAV that includes aerodynamics, flight dynamics, and control. It uses CFD for aerodynamic characteristics analysis and flow field simulation, six degrees of freedom equations of motion for UAV mathematical modeling, multi-objective genetic algorithm for optimal controller design. Through the open-loop UAV motion analysis and nonlinear closed-loop mathematical simulation, the collaborative design of UAV aerodynamic layout and flight control system is proposed, and the solution of flight stability and control problem is proposed.