吉林大学学报(工学版)

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基于太阳矢量的皮卫星姿态角测量误差分析

郁发新1,2,孙琳琳2   

  1. 1. 浙江大学 信息与电子工程系,杭州 310027;2. 浙江大学 浙江加州国际纳米技术研究院,杭州 310029
  • 收稿日期:2007-04-29 修回日期:2007-09-08 出版日期:2008-07-01 发布日期:2008-07-01
  • 通讯作者: 郁发新

Error analysis of pico-satellite attitude angle measurement based on sun vector

YU Fa-Xin1,2, SUN Lin-lin2   

  1. 1.Department of Information and Electronics Engineering, Zhejiang University, Hangzhou 310027, China;2.Zhejiang California International Nanosystems Institute, Zhejiang University, Hangzhou 310029, China
  • Received:2007-04-29 Revised:2007-09-08 Online:2008-07-01 Published:2008-07-01
  • Contact: YU Fa-xin

摘要: 分别分析计算了皮卫星姿态角测量的两大误差源:太阳矢量实际测量误差和轨道模型演化计算的太阳矢量误差。首先针对皮卫星体积小、重量轻、功耗低的特点,采用设计的微型太阳敏感器测量太阳矢量,与轨道演化计算获得太阳矢量相比,该方法更适合获取皮卫星姿态角度信息。通过分析获得太阳入射角——光电流非理想的余弦特性、光电流的噪声起伏、处理电路非线性、A/D采样非线性、温度测量不确定性等因素导致的太阳矢量实际测量误差为5.74°。由于皮卫星自身的特点不允许采用复杂的轨道演化模型,基于Kepler轨道模型计算获得的太阳矢量误差为0.1°。因此,基于太阳矢量的皮卫星姿态角测量总误差为5.84°。

关键词: 光电子技术与激光技术, 皮卫星, 太阳矢量, 太阳敏感器, 姿态角, 角度误差分析

Abstract: The error of pico-satellite attitude angle measurement consists of sun vector measurement error and sun vector calculation error, which are analyzed and calculated respectively. The picosatellite is characterized by small volume, light weight and low power consumption. Based on these characteristics, a designed micro sun sensor is used to measure the sun vector which is then compared with the sun vector calculated from the orbit propagator. In such a way the picosatellite attitude angle can be obtained. It is determined that the sun vector measurement error is about 5.74° which is caused by many factors, such as the non-ideal cosine curve between incident angle and photocurrent, the photocurrent noise, the nonlinearity of the analog circuit and the A/D converter, and the temperature inaccuracy etc. The limited resource of picosatellite constrains itself to adopt simple Kepler orbit propagator only to calculate the sun vector and its error which is about 0.1°. Thus the total attitude angle error is about 5.84°.

Key words: optoelectronics and laser, pico-satellite, sun vector, sun sensor, attitude angle, angle error analysis

中图分类号: 

  • TN216
[1] 郁发新,郑阳明,谢长雄,金佳军,金仲和 . 基于磁强计的皮卫星姿态角测量误差[J]. 吉林大学学报(工学版), 2007, 37(06): 1460-1464.
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