| 基于光照区太阳敏感器和陀螺辅助修正的微小卫星磁测技术 |
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| 引用本文： | 华冰,郁丰.基于光照区太阳敏感器和陀螺辅助修正的微小卫星磁测技术[J].中国惯性技术学报,2011(6). |
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| 作者姓名： | 华冰 郁丰 |
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| 作者单位： | 南京航空航天大学高新技术研究院; |
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| 基金项目： | 江苏省自然科学基金(BK2011729); 南京航空航天大学基本科研业务费专项科研项目(NS2010224) |
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| 摘 要： | 微小卫星经常用磁强计作为姿态测量的主要部件,磁强计的测量精度是影响微小卫星定姿性能的重要指标。为提高磁场估计精度,采用太阳敏感器和陀螺对磁强计误差进行辅助测量与修正,推导了磁强计误差估计方法,在光照区以太阳敏感器与陀螺输出作为俯仰滤波器观测量,估计出卫星俯仰角度和角速度。再采用最小二乘方法,利用滤波输出量对磁强计误差进行估计,估计的结果进入滤波器对磁场输出进行测量修正。仿真表明该方法简单易行,姿态角精度提高了1°左右,角速度精度最高提高了0.003(°)/s左右,并增强了卫星稳定性,有利于成像等任务的完成,有效提高了微小卫星导航系统性能。
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| 关 键 词： | 微小卫星 磁强计 太阳敏感器 陀螺 误差修正 |
Magnet measuring technology of micro satellite based on sun sensor and gyro auxiliary correction |
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| HUA Bing,YU Feng.Magnet measuring technology of micro satellite based on sun sensor and gyro auxiliary correction[J].Journal of Chinese Inertial Technology,2011(6). |
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| Authors: | HUA Bing YU Feng |
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| Institution: | HUA Bing,YU Feng(Frontier science of technology,Nanjing University of Aeronautics and Astronautics,Nanjing 210016,China) |
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| Abstract: | Magnetometer is the main instrument to determine the attitudes in micro satellite.Magnetometer accuracy is an important indicator which influences the micro satellite attitude performance.In order to improve magnet estimation accuracy,sun sensor and gyro are used to measure and correct the magnetometer error.Magnetometer error estimation method is derived,and satellite pitch angle and angle velocity are calculated through the pitch filter using the output of sun sensor and gyro as observation.Then,the least... |
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| Keywords: | micro satellite magnetometer sun sensor gyro error correction |
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