An Autonomous Fault Handling Method for Rubidium Atomic Clock Drift

Abstract

The invention relates to the technical field of the satellite navigation time frequency, and discloses a rubidium atomic clock drifting autonomous fault processing method. The method specifically comprises the following steps: step one, collecting rubidium signal tele-metering information of a main rubidium atomic clock and a standby rubidium atomic clock; step two, judging the rubidium signal slope change on the collected rubidium signal in a sliding-window way, judging whether the rubidium signals of the main rubidium atomic clock and the standby rubidium atomic signal are abnormal; step three, synchronously collecting phase difference tele-metering information of the main rubidium atomic clock and the standby rubidium atomic clock and judging whether the phase difference tele-metering information is abnormal; and step four, judging a frequency drifting rate abnormal state of the main rubidium atomic clock and the standby rubidium atomic clock according to step two and step three. The method disclosed by the invention provides the rubidium atomic clock drifting fault processing, the monitoring on the rubidium atomic clock frequency drifting fault and the system time autonomous recovery are realized; by adopting the technical measure of simultaneously monitoring the rubidium signal tele-metering slope change and the work rubidium atomic clock phase difference, the false alarmprobability of the system monitoring is reduced.

Description

technical field [0001] The invention relates to the field of satellite navigation time-frequency technology, in particular to a rubidium atomic clock drift autonomous fault processing method. Background technique [0002] Navigation satellite payloads are generally equipped with multiple high-precision rubidium atomic clocks. The drift characteristics of rubidium atomic clocks will directly affect the stability of the ranging value of the entire navigation system. How to monitor the drift rate of rubidium atomic clocks has always been a research content in the field of spaceborne time-frequency. At present, navigation satellites at home and abroad, such as GPS, Galileo, and Beidou, have taken some measures to monitor the failure of rubidium atomic clocks, leading to some internal parameters reflecting the status of rubidium atomic clocks, including: lock indication, rubidium signal, light intensity, TCB Temperature, cavity temperature, etc. have played a certain role in the ...

AI Technical Summary

Problems solved by technology

How to use the existing telemetry information to monitor the drift rate of the rubidium atomic clock has not yet formed an effective solution, and it is also impossible to realize the continuous recovery of the system time under the frequency drift fault of the rubidium atomic clock

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