| 基于卡尔曼滤波的脉冲星计时研究 |
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| 引用本文： | 孙守明,郑伟,汤国建,李满.基于卡尔曼滤波的脉冲星计时研究[J].天文学报,2009,50(3). |
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| 作者姓名： | 孙守明 郑伟 汤国建 李满 |
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| 作者单位： | 1. 国防科技大学航天与材料工程学院,长沙,410073
2. 空军航空大学,长春,130022 |
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| 基金项目： | 中国空间技术研究院 CAST创新基金，空间智能控制技术国家级重点实验室基金 |
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| 摘 要： | 脉冲星是高速自转的中子星,其自转周期稳定,不受人为干扰破坏,可作为绝对时间的参考量.论文提出一种基于卡尔曼滤波算法的脉冲星授时方法,以太阳某同步轨道为例,对基于卡尔曼滤波的钟差控制以及脉冲星星表误差和脉冲到达时间(TOA)测量精度对授时精度的影响进行了仿真分析.结果表明,该方法可以有效消除星载时钟钟差并抑制其随时间的增加,解决了航天器搭载低成本时钟精度不能满足要求的问题.
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| 关 键 词： | 时间 脉冲星 普通 航天器 仪器 |
Research of Pulsars-Based Timing by Using Kalman Filter |
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| SUN Shou-ming,ZHENG Wei,TANG Guo-jian,LI Man.Research of Pulsars-Based Timing by Using Kalman Filter[J].Acta Astronomica Sinica,2009,50(3). |
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| Authors: | SUN Shou-ming ZHENG Wei TANG Guo-jian LI Man |
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| Abstract: | Pulsar is a neutron star with stable and short rotation period, which is free from the risk of being destroyed by human, so it can be used as the absolute timing criterion. In this paper, a new pulsar-based timing method which adopts the Kalman Filter is proposed. Taking the sun-geosynchronous orbit for example, the clock control by using Kalman Filter and the effect of position errors and the measurement accuracy of time-of-arrival (TOA) of pulses on timing accuracy are simulated. The results show that the clock error could be corrected and controlled in this method and the precision problem is well solved when the space vehicle is equipped with the common clock. |
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| Keywords: | Time Pulsars General Space Vehicles Instruments |
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