临近空间对地观测平台的矢量化建模及稳定性分析

被引:7
作者
杨跃能
郑伟
吴杰
邹东升
机构
[1] 国防科技大学航天与材料工程学院
关键词
飞行动力学; 矢量化运动方程; Lypunov稳定性理论; 对地观测平台; 临近空间; 飞艇;
D O I
暂无
中图分类号
V212.1 [飞机飞行力学];
学科分类号
08 ; 0825 ;
摘要
研究了临近空间对地观测平台的矢量化建模和稳定性问题。定义了描述观测平台空间运动的坐标系及运动参数;在受力分析的基础上,根据Newton-Euler方程建立了矢量形式的六自由度非线性数学模型;基于此模型,应用Lyapunov稳定性理论对观测平台的稳定性进行了分析。研究结果表明:对于给定的未扰运动,观测平台是渐近稳定的;纵向和横侧向的自由扰动运动均由两个非周期衰减模态和一个振荡衰减模态叠加而成;观测平台受到瞬时扰动后,快衰减运动模态主要同转动运动有关,反映了受扰后力矩的平衡过程,而慢衰减运动模态主要同线速度运动有关,反映了受扰后力的平衡过程。
引用
收藏
页码:28 / 32
页数:5
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