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首页> 外文会议>International symposium on photoelectronic detection and imaging;ISPDI 2011 >Design of motion compensation mechanism of satellite remote sensing camera
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Design of motion compensation mechanism of satellite remote sensing camera

机译：卫星遥感摄像机运动补偿机制设计

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With the development of aerospace remote sensing technology, the ground resolution of remote sensing camera enhances continuously. Since there is relative motion between camera and ground target when taking pictures, the target image recorded in recording media is moved and blurred. In order to enhance the imaging quality and resolution of the camera, the image motion had to be compensated. In order to abate the effect of image motion to image quality of space camera and improve the resolution of the camera, the compensation method of image motion to space camera is researched. First, the reason of producing drift angle and adjustment principle are analyzed in this paper. This paper introduce the composition and transmission principle of image motion compensation mechanism. Second, the system adopts 80C31 as controller of drift angle, and adopts stepping motor for actuators, and adopts absolute photoelectric encoder as the drift Angle measuring element. Then the control mathematical model of the image motion compensation mechanism are deduced, and it achieve the closed-loop control of the drift angle position. At the last, this paper analyses the transmission precision of the mechanism. Through the experiment, we measured the actual precision of the image motion compensation mechanism, and compared with the theoretical analysis.There are two major contributions in this paper. First, the traditional image motion compensation mechanism is big volume and quality heavy. This has not fit for the development trend of space camera miniaturization and lightweight. But if reduce the volume and quality of mechanism, it will bring adverse effects for the precision and stiffness of mechanism. For this problem, This paper designed a image motion compensation that have some advantages such as small size, light weight at the same time, high precision, stiffness and so on. This image motion compensation can be applicable to the small optics cameras with high resolution. Second, the traditional mechanism control need to corrected, fitting and iterative for the control formula of mechanism. Only in this way, we can get the optimal control mathematical model. This paper has high precision of the control formula derived. It can achieve the high precision control without fitting, It also simplify the difficulty of control mathematical model establishment.This paper designed the range of adjusting of image motion compensation mechanism between -5° ～ +5°. Based on choosing-5°、 -4°、 -3°、 -2°、 -1°、 0°、 +1°、 +2°、 +3°、 +4° ,+4° as the expectation value of the imaginary drift angle, we get ten groups of the fact data in adjusting drift angle measured. The test results show that the precision of the drift angle control system can be achieved in 1 .It can meet the system requirements that the precision of the control system is less than 3 ', and it can achieve the high-precision image motion compensation.
机译：随着航空航天遥感技术的发展，遥感摄像机的地面分辨率不断提高。由于拍摄时相机和地面目标之间存在相对运动，因此记录在记录介质中的目标图像会移动并模糊。为了提高照相机的成像质量和分辨率，必须补偿图像运动。为了减轻图像运动对空间相机图像质量的影响，提高相机的分辨率，研究了图像运动对空间相机的补偿方法。首先，分析了产生偏角的原因和调整原理。介绍了图像运动补偿机构的组成和传输原理。其次，系统采用80C31作为漂移角控制器，执行器采用步进电机，并采用绝对光电编码器作为漂移角测量元件。然后推导了图像运动补偿机构的控制数学模型，实现了对漂移角位置的闭环控制。最后，分析了该机构的传动精度。通过实验，我们测量了图像运动补偿机构的实际精度，并与理论分析进行了比较。本文有两个主要贡献。首先，传统的图像运动补偿机制体积大，质量高。这不符合太空照相机小型化和轻量化的发展趋势。但是如果减小机构的体积和质量，将会对机构的精度和刚度带来不利影响。针对这一问题，本文设计了一种图像运动补偿器，它具有体积小，重量轻，精度高，刚度高等优点。该图像运动补偿可以适用于具有高分辨率的小型光学相机。其次，传统的机构控制需要对机构的控制公式进行修正，拟合和迭代。只有这样，我们才能得到最优的控制数学模型。本文具有很高的推导控制公式。无需配合即可实现高精度控制，也简化了建立控制数学模型的难度。本文设计了图像运动补偿机构在-5°〜+ 5°之间的调节范围。基于选择5°，-4°，-3°，-2°，-1°，0°，+ 1°，+ 2°，+ 3°，+ 4°，+ 4°作为的期望值假想的漂移角，在调整测得的漂移角时得到十组事实数据。测试结果表明，该漂移角控制系统的精度可以达到1。可以满足系统要求，控制系统的精度小于3'，可以实现高精度的图像运动补偿。

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