单相机迎角测量中振动影响研究

doi:10.7527/S1000-6893.2013.0088

流体力学与飞行力学

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单相机迎角测量中振动影响研究

孙岩¹, 姚海艳², 张征宇¹

1. 中国空气动力研究与发展中心空气动力学国家重点实验室, 四川绵阳 621000;
2. 四川九洲电器集团有限责任公司, 四川绵阳 621000

收稿日期:2012-04-23 修回日期:2012-06-11 出版日期:2013-03-25 发布日期:2013-03-29
通讯作者: 孙岩,Tel.: 0816-7067916 E-mail: supersunyan@163.com E-mail:supersunyan@163.com
作者简介:孙岩男, 博士研究生, 助理研究员。主要研究方向: 风洞试验测量技术与计算流体力学。 Tel: 0816-7067916 E-mail: supersunyan@163.com
基金资助:
国家自然科学基金(51075385)

Vibration Influence Research on Single Camera Measurement of Angle of Attack

SUN Yan¹, YAO Haiyan², ZHANG Zhengyu¹

1. State Key Laboratory of Aerodynamics, China Aerodynamics Research and Development Center, Mianyang 621000, China;
2. Sichuan Jiuzhou Electric Group Co., Ltd, Mianyang 621000, China

Received:2012-04-23 Revised:2012-06-11 Online:2013-03-25 Published:2013-03-29
Supported by:
National Natural Science Foundation of China (51075385)

摘要/Abstract

摘要：

从描述像空间坐标与物理空间坐标关系的共线方程出发,推导出单相机迎角测量中模型迎角关于相机外方位元素的计算公式。在单相机迎角测量中模型表面标记点展向坐标Y不变的假设下,研究了2 m量级风洞中,相机位于5个不同位置时,3个角外方位元素(φ,ω,κ)和模型侧滑角β在-2°～2°之间振动对迎角测量结果的影响。模拟结果表明:φ和κ的振动对迎角测量结果影响较大,且该影响对相机位置和模型迎角的变化不敏感;在相机位于法向投影位置(相机光轴与Y轴平行)时,ω与β的振动对迎角测量结果影响非常小,可以忽略,但影响量随相机位置偏离法向投影位置迅速增加。

关键词: 单相机测量, 迎角, 侧滑角, 振动, 共线方程

Abstract:

A formula for calculating the model angle of attack with the exterior orientation elements of a camera in a single camera measurement of the angle of attack is derived from the collinearity equations which describe the relationship between the image plane coordinates and the physical space coordinates. On the assumption that spanwise coordinate Y of the targets on the model surface keeps constant in a single camera measurement of the angle of attack, the vibration influence on the model angle of attack measurement is investigated in a 2 m wind tunnel when the three angle exterior orientation elements (φ, ω, κ) and model sideslip angle β vibrated between -2° and 2° at five different camera positions. Influence simulation results show that the vibrations of φ and κ have a great influence on the angle of attack measurements, and that the influence is insensitive to the change of camera positions and model angles of attack; the vibration influence of ω and β on the angle of attack measurement is small and negligible when the camera is located at a normal projection position (i.e., the optical axis of the camera is parallel with axis Y), but the influence increases quickly as the camera location moves away from the normal projection position.

Key words: single camera measurement, angle of attack, sideslip angle, vibration, collinearity equation

中图分类号:

V211.7

孙岩, 姚海艳, 张征宇. 单相机迎角测量中振动影响研究[J]. 航空学报, doi: 10.7527/S1000-6893.2013.0088.

SUN Yan, YAO Haiyan, ZHANG Zhengyu. Vibration Influence Research on Single Camera Measurement of Angle of Attack[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, doi: 10.7527/S1000-6893.2013.0088.

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E-mail：hkxb@buaa.edu.cn

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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

单相机迎角测量中振动影响研究

Vibration Influence Research on Single Camera Measurement of Angle of Attack

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