临近空间太阳能飞行器横航向稳定性

doi:10.7527/S1000-6893.2015.0225

流体力学与飞行力学

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临近空间太阳能飞行器横航向稳定性

李锋, 叶川, 李广佳, 郑安波, 付义伟

中国航天空气动力技术研究院, 北京 100074

收稿日期:2015-06-12 修回日期:2015-08-07 出版日期:2016-04-15 发布日期:2015-09-30
通讯作者: 叶川,Tel.:010-68741286 E-mail:15901480592@163.com E-mail:15901480592@163.com
作者简介:李锋,男,博士,研究员,博士生导师。主要研究方向:流体力学,飞行器设计。Tel:010-68375166 E-mail:lifengcaaa@163.com;叶川,男,博士,工程师。主要研究方向:飞行器设计,飞行力学。Tel:010-68741286 E-mail:15901480592@163.com;李广佳,男,硕士,高级工程师。主要研究方向:流体力学,飞行器设计。E-mail:18911898039@163.com;郑安波,男,博士,工程师。主要研究方向:飞行器设计。E-mail:olboy@sina.com;.cn;付义伟,男,硕士,高级工程师。主要研究方向:流体力学,飞行器设计。E-mail:yimei0009@aliyun.com
基金资助:
国家"973"计划(2014CB744803)

Lateral-directional stability of near-space solar-powered aircraft

LI Feng, YE Chuan, LI Guangjia, ZHENG Anbo, FU Yiwei

China Academy of Aerospace Aerodynamics, Beijing 100074, China

Received:2015-06-12 Revised:2015-08-07 Online:2016-04-15 Published:2015-09-30
Supported by:
National Basic Research Program of China (2014CB744803)

摘要/Abstract

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0 m/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。

关键词: 临近空间, 太阳能, 横航向, 稳定性, 模态, 动力学模型, 风场

Abstract:

The lateral-directional aerodynamic derivatives and mass characteristics of the near-space solar-powered aircraft are very different from conventional aircraft. The characteristics of its lateral-directional modes differ from conventional aircraft. Theoretic analysis shows that the large rolling-moment-due-to-yaw-rate derivative and small yawing-moment-due-to-yaw-rate derivative of the near-space solar-powered aircraft result in the divergent spiral mode. Moreover, the ratio of aerodynamic damping moment to inertia moment is large, causing the high damping ratio of the Dutch roll mode. In order to solve the problem that the impact of wind could not be represented in conventional linear dynamic model, a linear lateral-directional dynamic model, which considers the impact of wind and is applied to the 0 m/s ground speed state, is established by employing the projection of ground speed onto body coordinate system as the state variable. The lateral-directional stabilities of the near-space solar-powered aircraft in horizontal and vertical wind are analyzed using the model. The analysis indicates that stable wind field has no impact on eigenvalues of lateral-directional modes, while it leads to different eigenvectors. The established dynamic model could be used for dynamic analysis and simulation of this kind of aircraft.

Key words: near-space, solar-powered, lateral-directional, stability, mode, dynamic model, wind field

中图分类号:

V212.12

李锋, 叶川, 李广佳, 郑安波, 付义伟. 临近空间太阳能飞行器横航向稳定性[J]. 航空学报, 2016, 37(4): 1148-1158.

LI Feng, YE Chuan, LI Guangjia, ZHENG Anbo, FU Yiwei. Lateral-directional stability of near-space solar-powered aircraft[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2016, 37(4): 1148-1158.

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主管单位：中国科学技术协会主办单位：中国航空学会北京航空航天大学

临近空间太阳能飞行器横航向稳定性

Lateral-directional stability of near-space solar-powered aircraft

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