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Numerical verification algorithm for relative positioning accuracy between chang'e 2 and Asteroid Toutatis of 2012 Flyby

机译:2012年嫦娥嫦娥2与小行星Toutatis的相对定位精度的数值验证算法

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On December 13, 2012, China's Chang'e 2 Spacecraft successfully flew past No.4179 Asteroid Toutatis, and acquired a series of clear optical images concerning Toutatis. The data obtained is very important for us to be able to establish feasible methods for deep-space optical navigation. However, as the fly-by process cannot be repeated and deep-space environments cannot be tested using physical platforms on the ground, the problem concerning how to verify the correctness and accuracy of optical positioning algorithms emerges. According to the fly-by strategy of Chang'e 2 to detect Toutatis, in combination with navigation motion relationships between the spacecraft and the asteroid, such as orbit and position, and in light of actual data and problem models, the paper constructs a set of algorithms of ground numerical appraisal for relative positioning accuracy when Chang'e 2 flies past Toutatis. Through three relative positioning algorithms, conducting algorithm testing of ground numerical appraisal, which effectively appraises the positioning algorithm accuracy through numerical methods and clearly explains the sources of random error and system error, This method can be used as the basic means for ground verification of deep-space optical navigation algorithms.
机译:2012年12月13日,中国的嫦娥二号航天器成功地飞过了4179号小行星Toutatis,并获得了一系列关于Toutatis的清晰光学图像。所获得的数据对于我们能够建立用于深空光学导航的可行方法非常重要。然而,由于不能重复飞行过程,并且无法使用地面上的物理平台测试深空环境,关于如何验证光学定位算法的正确性和准确性的问题。根据嫦娥2的循环策略来检测Toutatis,与航天器和小行星之间的导航运动关系组合,例如轨道和位置,以及根据实际数据和问题模型,纸张构造了一组嫦娥二倍过去刚刚的相对定位精度的地数值评价算法。通过三个相对定位算法,进行地面数值算法测试,这通过数值方法有效地评估了定位算法精度,并清楚地解释了随机误差和系统错误的来源,这种方法可以用作深层验证的基本手段 - 空间光学导航算法。

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