基于CFD方法的固定翼无人机着陆控制的建模

Modeling for the Landing Control of a Fix-wing UAV based on CFD Method

  • 摘要: 应用CFD方法求解固定翼无人机气动力系数,构建几何模型,设定计算域并划分计算网格,基于非耦合隐式求解器求解在K-E湍流模型下各飞行状态的气动特性;提出以较大迎角低速滑翔降落的着陆控制方法,基于计算的气动特性,求解飞机降落前的理想状态,构建基于状态反馈的纵向控制律实现着陆控制;在Simulink环境中,基于Aerosim工具箱构建仿真程序,验证了本文方法的有效性。

     

    Abstract: The coefficiency of aerodynamic force for a Fix-wing UAV based on CFD method is aquired in this paper, which also creates a geometry for the UAV,meshes the geometry and specifies boundary types. And the coefficeny through uncoupled implicit solver in K-E turbulence model is solved. The paper also presents a landing control method of keeping the UAV in large angel of attack and low velocity by sliding, which computes the right state of pre-landing by the computed coefficiency.A state feedback controller is applied to the landing control. The simulation programme constructed on the basis of Arosim toolbox in Simulink environment verifies the validity of the method applied in this paper..

     

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