Patent
Integrated clock error forecasting method
Qiang Liu,Chen Xihong,Jizhe Sun,Yongshun Zhang,Liu Zan,Li Chenglong +5 more
- 10 Aug 2018
4
TL;DR: In this article, the authors proposed an integrated clock error forecasting method, which comprises the steps of performing primary differential processing on an original clock error sequence to obtain a clock error difference sequence; performing learning forecasting by adopting a quadratic polynomial model according to learning segment data in the clock error different sequence; carrying out coarse forecasting on a fitting segment by adopting the quadratically polynomials model according according to a learning result, and calculating the difference between a clock errors difference value of the fitting segment sequence sequence and the obtained coarse forecasting value of fitting segment to obtain
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Abstract: The invention relates to an integrated clock error forecasting method, which comprises the steps of performing primary differential processing on an original clock error sequence to obtain a clock error difference sequence; performing learning forecasting by adopting a quadratic polynomial model according to learning segment data in the clock error difference sequence, carrying out coarse forecasting on a fitting segment by adopting the quadratic polynomial model according to a learning result, and calculating the difference between a clock error difference value of a fitting segment sequencein the clock error difference sequence and the obtained coarse forecasting value of the fitting segment to obtain a fitting error sequence; carrying out fine adjustment by using a gray forecasting model according to the fitting error sequence to obtain a fine adjustment forecasting value; carrying out coarse forecasting by adopting the quadratic polynomial model according to the clock error difference sequence to obtain a coarse forecasting value of the clock error difference sequence; adding the coarse forecasting value and the fine adjustment forecasting value of the clock error difference sequence to obtain a integrated forecasting sequence; performing a difference inverse operation on the integrated forecasting sequence to obtain a final clock error forecasting sequence; and calculating the difference between the original clock error sequence and the final clock error forecasting sequence to obtain a forecasting error The forecasting precision can be improved according to the method
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Citations
Patent
Real-time clock deviation prediction method and device, and computer equipment
Dai Zhiqiang,Ge Maorong,Bao Zhixiong,Li Chenggang,Shi Xiaoyu,Zuo Xiang +5 more
- 25 Oct 2019
TL;DR: In this article, the authors proposed a real-time clock deviation prediction method based on a reference station network, where the clock deviation of an epoch is predicted using a sliding window model.
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Liu Qiang,Chen Xihong,Lunsheng Xue +2 more
- 01 Jan 2019
TL;DR: In this article, a sliding window-based dynamic smoothing coefficients are introduced for performing forecasting, and the error learning is carried out by utilizing the grey forecasting model, so that the precision of clock error forecasting is improved.
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Chang Zhongxiang,Xu Xueren,Zhang Shaoding,He Leipeng,Xie Tingfeng +4 more
- 21 Dec 2018
TL;DR: In this article, an on-satellite autonomous satellite orbit prediction method is proposed, where a user comprehensively considers prediction precision of an orbit and the acceptable running time of an actual project and presets an orbit prediction period and segment time intervals, and a ground control system performs precise prediction on orbit prediction requirements proposed by the user to generate all segment initial orbital parameters in the orbit prediction periods.
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Short-term combined clock correction forecasting method under condition of uncertain forecasting duration
Liu Qiang,Chen Xihong,Ren Weihua,Qian Gu,Li Xiaohua,Liu Zan,Shuang Zhang +6 more
- 30 Aug 2019
TL;DR: In this article, a short-term combined clock correction forecasting method under a condition of uncertain forecasting duration is presented, and the method comprises the following steps that: obtaining an original clock correction sequence, and carrying out differential processing; according to the original clock corrections sequence, calculating a clock correction data quality factor, and determining the forecasting duration; adopting at least two types of clock corrections forecasting methods to carry out forecasting learning; calculating the weight value of each clock correction forecast method; calculating a combined clock corrections forecast value; judging whether time synchronization is established again or not at any time in
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Patent
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