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研究了变化风场中无人机的动力学建模与飞行特性问题。给出了大气扰动的Von Kaman模型,推导出变化风场中无人机的六自由度非线性动力学模型,最后基于上述模型进行数值计算,分析了变化风场中无人机的飞行特性。结果表明,该模型能准确地描述无人机的动力学和运动学规律;大气扰动下,各运动参数均产生不同幅度的振荡;同一频谱的扰动在不同方向上对无人机的影响差异较大;地速航向角和空速航向角存在偏差,侧向扰动对航向的影响最为显著。
The dynamics modeling and flight characteristics of UAV in changing wind field are studied. The Von Kaman model of atmospheric disturbance is given, and a six-degree-of-freedom nonlinear dynamic model of the UAV in the wind field is derived. Finally, based on the above model, the UAV’s flight characteristics are analyzed. The results show that the model can accurately describe the dynamics and kinematics rules of UAV. Under the disturbance of atmosphere, all the motion parameters have different amplitudes of oscillation. The differences of the disturbance of the same spectrum in different directions are different Large; ground speed heading and airspeed heading angle deviation, lateral disturbance on the heading of the most significant.