论文部分内容阅读
随着科学技术的进步,航空相机向着高分辨率、大视场方向发展,现有单片CCD不能满足大视场的要求,高精度、多自由度的CCD拼接技术已成为当前发展的迫切需求。通过对比现有拼接技术的优劣,提出了一种新的大面阵CCD多自由度机械交错拼接技术,采用三点凸轮式多自由度拼接机构,取代传统修磨垫片方式,拼接时可在线实时调整。对拼接精度进行分析,结果表明,该方法的搭接误差<2μm,共面误差<4μm,满足航空相机大视场和高分辨率要求;对拼接结构进行模态仿真分析与模态测试实验,拼接机构一阶谐振频率大于390 Hz,满足使用要求。
With the progress of science and technology, the development of aviation cameras toward high resolution and large field of view, the existing single CCD can not meet the requirements of large field of view, high precision, multi-degree of freedom CCD splicing technology has become an urgent need for current development . By comparing the advantages and disadvantages of the existing splicing techniques, a new large area array CCD multi-degree-of-freedom mechanical splicing technique is proposed. The three-point cam multi-degree-of-freedom splicing mechanism is adopted to replace the conventional grinding method. Online real-time adjustment. The results show that the lapping error <2μm, the co-planar error <4μm, which meets the requirements of large field of view and high resolution of aerial camera. The modal simulation analysis and modal test of the spliced structure are carried out. First-order splicing mechanism resonant frequency greater than 390 Hz, to meet the requirements.