Method for generating atomic time scale through Algos and Kalman combination

An atomic time scale and atomic clock technology, which can be applied to instruments using atomic clocks, etc., can solve the problem of inability to accurately describe the noise level of atomic clocks, and achieve the effect of reducing divergence and good stability.

Inactive Publication Date: 2016-09-28
BEIJING UNIV OF TECH
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Problems solved by technology

[0004] The current atomic time algorithm adopted by the timekeeping laboratory of the Metrology Institute is the Algos algorithm, and the obtained time scale has high long-term stability, but it is a hysteresis algorithm
And the algorithm uses the standard deviation to measure the size of the atomic clock noise, which can no longer accurately describe the size of the atomic clock noise

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  • Method for generating atomic time scale through Algos and Kalman combination
  • Method for generating atomic time scale through Algos and Kalman combination
  • Method for generating atomic time scale through Algos and Kalman combination

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Embodiment Construction

[0024] The present invention will be described in further detail below in conjunction with specific embodiments and with reference to the accompanying drawings.

[0025] An embodiment of the present invention provides a method for generating an atomic time scale by using an Algos-Kalman combination. Due to the divergence problem of the Kalman filter, the calculated time scale may diverge, but the time scale obtained by the improved Algos algorithm has good stability. Therefore, utilize the improved Algos algorithm to calculate the phase, frequency results and system noise of the clock as the initial value and system noise variance of the Kalman algorithm, to prevent the Kalman algorithm estimation result error from increasing infinitely with time; the Algos-Kalman combination of the present invention produces The time scale of , used for frequency forecasting and master clock steering.

[0026] Such as figure 1 As shown, a method of generating an atomic time scale includes th...

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Abstract

The invention discloses a method for generating atomic time scale through the Algos and Kalman combination. The method includes the steps that firstly, original clock correction data is subjected to outlier detection; TA-K Hadamard variances in first six months are calculated to determine the weight of each clock to calculate the TA-K weight of the current month; then a result obtained through an improved Algos algorithm is used as input of a noise matrix and an initial value of the Kalman algorithm, and the weight of each clock is determined through the Hadamard variances; finally, the clock correction value at the next moment is predicted. By means of the technical scheme, the divergence of the Kalman algorithm can be reduced, and the time scale stability can be good.

Description

technical field [0001] The invention belongs to the technical field of atomic time scales, and in particular relates to a method for generating atomic time scales by combining Algos and Kalman with atomic clock data. Background technique [0002] Time-frequency research is an important branch of basic scientific research, and time-frequency plays a pivotal role in scientific research, positioning systems, power systems, military affairs, and national security. For this reason, most countries in the world have established their own punctual laboratories to produce their own national atomic time scales and participate in international comparisons. [0003] The China Metrology Institute is responsible for the time and frequency of sending standards across the country, so an accurate time scale is of great significance. In the China Metrology Institute, the clock group is controlled by the atomic time algorithm to generate the output of time and frequency. On the premise that ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G04F5/14
CPCG04F5/14
Inventor 朱江淼郑鹏飞秦慧军赵琳潇
Owner BEIJING UNIV OF TECH
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