立式风洞全视场尾旋姿态测量技术研究

发布时间：2018-05-10 05:35

本文选题：尾旋 + 立式风洞　；参考：《实验流体力学》2016年06期

【摘要】：尾旋运动是飞机的一种非正常的极限飞行状态,复杂并且危险,极易造成飞行事故。在立式风洞中开展尾旋实验是研究尾旋现象的主要技术手段之一,目的是为了获取实验过程中模型飞机的姿态角,用于对其尾旋特性进行分析。针对尾旋实验运动状态的特点,以及双目测量系统在以往实验应用中的缺陷,设计了一种全视场测量方案,并围绕其关键技术问题开展了研究,使用编码标记识别技术实现特征标记的自动识别,通过基于刚体的三维重建技术实现模型姿态的测量,采用基于共同基准平面的数据标定方法实现多视角姿态数据的有效融合。通过立式风洞尾旋实验验证了该技术的有效性及可靠性,实验结果曲线完整,图像利用率达到了95%,为尾旋运动特性分析提供了更加丰富的数据支撑。
[Abstract]:Spin motion is an abnormal extreme flight state of aircraft, which is complex and dangerous, and can easily cause flight accidents. The spin experiment in vertical wind tunnel is one of the main technical means to study the spin phenomenon in order to obtain the attitude angle of the model aircraft during the experiment and to analyze its spin characteristics. Aiming at the characteristics of the motion state of the spin experiment and the defects of the binocular measurement system in the previous experiments, a full field of view measurement scheme is designed, and the key technical problems are studied. The automatic recognition of feature marks is realized by using coding marking recognition technology, the attitude measurement of model is realized by 3D reconstruction technology based on rigid body, and the effective fusion of multi-view attitude data is realized by the data calibration method based on common datum plane. The validity and reliability of the technique are verified by the vertical wind tunnel spin experiments. The experimental results show that the curve is complete and the image utilization ratio is up to 95%, which provides a more abundant data support for the analysis of spin motion characteristics.
【作者单位】：中国空气动力研究与发展中心;重庆大学自动化学院;
【分类号】：TP391.41;V211.74

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