论文部分内容阅读
视频测量(Videogrammetric Measurement,VM)技术因其对试验模型的设计制造无要求,受到国内外风洞试验机构的青睐,本文综述了国外航空航天强国的风洞试验机构所掌握的VM技术,并分析了VM技术在我国高速暂冲风洞试验中应用所面临的问题,据此中国空气动力研究与发展中心(CARDC)提出了多相机动态标定与基于运动估计的序列图像匹配技术,在暂冲高速风洞高噪声(130dB左右)振动环境下,建立了高精度的模型位姿光学测量技术,2米量级高速风洞中的多个应用表明:视频测量的精度高,已用于高速试验模型的姿态与变形测量;另一方面,通过VM测量偏折位移场得到光束从摄影中心出发穿过扰流区的光程差,为气动光学效应的研究与测量以及试验模型的壁面流动显示提供新的途径,其光路简单、无需使用价格昂贵的相干光源,因此具有巨大应用前景。
Because of its no requirement on the design and manufacture of the test model, the Videogrammetric Measurement (VM) technology is favored by wind tunnel test organizations both at home and abroad. This paper reviews the VM technology mastered by wind tunnel test organizations in foreign aerospace powerhouses, According to the problems faced by the application of VM technology in China’s high-speed temporary flushing wind tunnel test, CARDC proposed the multi-camera dynamic calibration and sequence-based image matching technology based on motion estimation, High-precision model poses optical measurement technology was established under the vibration environment of high noise (about 130dB) in wind tunnel. Several applications in high-speed wind tunnel of 2-meter scale show that the video measurement has high precision and has been used in high-speed test model On the other hand, the optical path difference of the beam from the photographic center through the spoiler area is obtained by measuring the deflection displacement field by the VM, providing new research on the aerodynamic optical effect and the wall flow display of the experimental model The way, its light path is simple, do not need to use expensive coherent light source, so has great application prospect.