临近空间太阳能飞行器横航向稳定性

发布时间：2018-03-26 08:57

本文选题：临近空间　切入点：太阳能　出处：《航空学报》2016年04期

【摘要】：临近空间太阳能飞行器的横航向气动导数和质量特性与常规飞行器存在显著差异,其横航向模态具有不同于常规飞行器的特点。理论分析表明,临近空间太阳能飞行器滚转交感动导数较大,偏航阻尼动导数较小,导致螺旋模态发散;航向气动阻尼力矩和惯性力矩之比较大,因而荷兰滚模态阻尼比较大。为解决常规线性化动力学模型无法体现风场影响的问题,以地速在机体坐标系中的投影作为状态变量,建立了考虑风场影响、适用于地速为0m/s状态的线性化横航向动力学模型。利用此模型分析了临近空间太阳能飞行器在水平风和垂直风中的横航向稳定性。分析结果表明,稳定风场对横航向模态特征根无影响,但会导致横航向模态特征矢量发生改变。建立的动力学模型可用于此类飞行器的动力学分析和仿真。
[Abstract]:The aerodynamic derivative and mass characteristics of the solar vehicle in the near space are different from those of the conventional vehicle, and the transverse heading mode is different from that of the conventional vehicle. The theoretical analysis shows that the aerodynamic derivative and mass characteristics of the solar vehicle are different from those of the conventional vehicle. The moving derivative of roll transfer and the dynamic derivative of yaw damping are larger than those of solar vehicle in near space, which results in the divergence of helical mode, and the relatively large aerodynamic damping moment and inertia moment of heading, In order to solve the problem that the influence of wind field can not be reflected in the conventional linearized dynamic model, the projection of ground velocity in body coordinate system is taken as the state variable, and the influence of wind field is considered. A linearized transverse heading dynamics model with 0m/s state is applied to analyze the lateral heading stability of solar vehicles in the near space in horizontal and vertical wind. The steady wind field has no effect on the transverse heading modal characteristic root, but it will result in the change of the transverse heading modal characteristic vector. The established dynamic model can be used for the dynamic analysis and simulation of this kind of aircraft.
【作者单位】：中国航天空气动力技术研究院;
【分类号】：V272

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