国防科技大学 空天科学学院， 长沙 410073
收稿日期:2019-09-17出版日期:2020-10-28发布日期:2020-11-09通讯作者:朱炳杰，男，讲师，电话(Tel):0731-87007135；E-mail:jackerzhu@163.com.作者简介:杨宇丹(1996-)，女，吉林省大安市人，硕士生，主要从事飞行器设计方面研究.基金资助:国家自然科学基金(61703414)，湖南省自然科学基金(2017JJ3356，2018JJ3590)资助项目The Sensitivity Analysis of Energy System Parameters of Solar Powered Unmanned Aerial Vehicle
YANG Yudan,ZHU Bingjie,GUO Zheng,YANG XixiangCollege of Aerospace Science and Engineering, National University of Defense Technology, Changsha 410073, China
Received:2019-09-17Online:2020-10-28Published:2020-11-09摘要/Abstract
摘要： 通过对太阳能无人机驻空过程中4个典型飞行阶段的特点分析，总结相应的功率变化模型，并通过分析此模型获得所需功率与质量、功率因子、展弦比密切相关的结论，并进一步分析了这三者对太阳能无人机的能源系统及整体设计的影响.通过对功率因子随攻角变化规律的分析研究，获得了满足飞行能量需求的攻角变化范围；考虑能量平衡，对太阳能无人机各子系统质量以及整体质量进行建模，分析翼展和展弦比对质量的影响，同时讨论了储能电池和太阳能电池质量对功率需求的影响.结合上述分析得出结论：随着翼展的增大，太阳能无人机所需功率有所增大；当翼展一定时，随着展弦比的增加，所需功率有所减小.
Abstract: Through analysis of the characteristics of four typical flight stages of solar powered unmanned aerial vehicle (UAV) in the air, the power models required are summarized in this paper. Based on these models, it is concluded that the power required is closely related to total mass, power factor, and aspect ratio. The influence of these factors on energy system and overall design are analyzed. By studying the relationship between power factor and angle of attack, the range of angle of attack which meets the flight energy requirements is obtained. Considering the energy balance, the models of each subpart mass and total mass of solar powered UAV are established. Besides, the influence of wingspan and aspect ratio on mass is examined. Simultaneously, the relationships among the mass of battery, solar cells, and power demands are discussed. Based on the analysis, it is concluded that with the increase in wingspan, the power required of solar powered UAV increases. When the wingspan is constant, the power required decreases as the aspect ratio increases.
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