直升机着舰六自由度测量算法及数字图像处理实验

【作者】 刘志强；

【导师】 朱大勇；

【作者基本信息】 电子科技大学 ， 光学工程， 2003， 硕士

【摘要】 本论文以国防科技十五项目为背景，概要地介绍了国内外直升机着降和光电引导装置的最新发展状况,对机载CCD电视传感器的信标测量算法进行系统分析和深入研究，对图像处理进行了讨论，提出了具有创新意义的机载红外CCD视景增强系统设计。 本文对光电助降系统前端的视频信号处理算法进行了研究。分析了双摄影测量算法和单摄影测量算法，选用了适合于机载CCD的信标点像平面坐标提取算法和单摄影算法——六自由度测量算法。对六自由度算法进行了仿真和误差分析，提出了要满足小于10cm的系统图像处理要求，挂钩位置误差必须小于一个像素点的误差。设计制作了实验硬件系统。设计了适当摄影测量算法的信标点平面，采用了红外波段的CCD，以DSP为核心器件设计了信标点像平面位置坐标提取的硬件电路。对设计的实验系统进行了具体的调试，证明所设计的硬件电路能正常工作。结合图像处理算法和信标点像平面坐标提取算法，完成了验证六自由度摄影测量算法实验，通过实验数据分析，分析了CCD畸变引起的误差，对数据拟合后，得到了满足系统设计的误差小于10厘米的要求，为研制实际的直升机着降系统提供了重要的参考价值。更多还原

【Abstract】 Based on the background of the "Ten-Five" Technology Project ，we introduced the last development of helicopter’s landing devices and optolelectronic guiding equipments. This paper describes the study of beacons-based algorithms of CCD TV sensor, discusses the imaging processing, design the infrared vision-enhanced system.In this dissertation, first of all, we have made a systemic analysis and study of algorithms of video signal processing, analysed single-CCD photogrammetry and double-CCD photogrammetry, for helicopter’s landing system， adopted properly the photogrammetry，photogrammetry of six parameters. We simulated algorithms of six parameters on computer and analysed the error, for demand of 10cm departure, the distance departure on imaging plane is less than one pixel.We designed and made the experimentation system. We designed the beacons plane, used proper infrared CCD and designed real hardware circuite based on the DSP, which can be used to simulate and experiment on precision positioning algorithm by computer. We tested the whole system and proved that the hardware circuit could work normally.In the end, according to imaging algorithms and the photogrammetry, results experimentation proved that the photogrammetry of six parameters is available. We make a Polynomial evaluation, the linear evaluated result of the experiment meet the system demand of 10cm departure.all of done offers the important referenced value to develop the actual helicopter landing system.更多还原