高空太阳能弹性无人机纵向动力学特性研究  

Study on longitudinal flight dynamic characteristics of high altitude flexibility solar UAV

作　　者：冯扬帆[1] 周洲[1] 肖伟[1] 

机构地区：[1]西北工业大学无人机特种技术国家重点实验室,陕西西安710065

出　　处：《飞行力学》2014年第1期1-4,共4页Flight Dynamics

基　　金：国家装备预研基金资助(9140A25010312HK0301);西北工业大学基础研究基金资助(JCT20130110)

摘　　要：将基于局部坐标系下的动力学状态方程转换到平均轴坐标系与模态坐标系组成的整体坐标系下,使状态方程便于动力学特性分析。在不同状态点下进行动力学特性分析并与刚性无人机进行比较,结果表明,因为动能与弹性势能相互转换,长周期运动与结构变形发生耦合使长周期运动特性恶化,弹性变形使得机翼上弯从而增加了俯仰转动惯量,短周期运动阻尼比也随之增加,改善了弹性无人机的短周期运动特性。This paper is based on flight dynamic equation of part reference frame. This equation will be transformed to the whole reference frame and will be convenient for the study of flight dynamics. The dy- namic characteristics is analyzed and compared with the rigid UAV at different conditions. The studies in- dicate, due to the interconversion of dynamic energy and flexible potential, that the long period mode is coupled with the structural distortion, which makes the long period motion worse. As the deformation of structure, the longitudinal inertia is increasing and the short mode goes better.

关 键 词：太阳能无人机 大展弦比 弹性 动力学特性 

分 类 号：V212.1[航空宇航科学与技术—航空宇航推进理论与工程] V279