Time-frequency system fault diagnosis method, device and equipment and storage medium

By measuring the time difference and temperature of the time-frequency system, a model is constructed to estimate the time difference noise and frequency deviation. Combined with the fault judgment threshold to detect minor faults, the problem of poor fault diagnosis performance of the time-frequency system in the prior art is solved, and efficient fault detection and system stability improvement are achieved.

CN117896236BActive Publication Date: 2026-07-21NAT UNIV OF DEFENSE TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
NAT UNIV OF DEFENSE TECH
Filing Date
2024-01-16
Publication Date
2026-07-21

AI Technical Summary

Technical Problem

Existing fault diagnosis methods for time and frequency systems are ineffective at diagnosing minor faults, resulting in poor fault diagnosis performance and impacting the stability and reliability of satellite navigation systems.

Method used

By measuring the time difference and temperature of each time-frequency signal link in the time-frequency system, a time difference measurement combination estimation model and a forecast time difference calculation model are constructed to estimate the time difference measurement noise, frequency deviation, and forecast deviation. Combined with fault judgment thresholds and related parameters, single-link fault detection and identification are realized.

Benefits of technology

It improves the fault diagnosis performance of the time and frequency system, enabling the detection of minor faults, enhancing the stability and reliability of the system, simplifying the device structure, and reducing procurement costs.

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Abstract

The application relates to a time-frequency system fault diagnosis method, device, equipment and storage medium. The method comprises the following steps: time difference measurement and temperature measurement are performed on each time-frequency signal link of a time-frequency system to obtain time difference measurement results and temperature measurement results, and temperature change results of each time-frequency signal link are calculated according to a set reference temperature; the time difference measurement results and the temperature change results are input into a pre-constructed time difference measurement combination estimation model and a predicted time difference calculation model to estimate time difference measurement noise, time difference frequency deviation and time difference prediction deviation, and single-link fault detection and identification are performed on the time-frequency system according to a preset fault judgment threshold and related parameters; and through comprehensive processing of fault detection and identification results of each time-frequency signal link, time-frequency system fault diagnosis is realized. The method can detect and diagnose the slight faults of each time-frequency signal link of the time-frequency system, and improves the fault diagnosis performance of the time-frequency system.
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