A redundancy-based composite inertial system temperature compensation fault isolation method

By employing redundant design and collaborative algorithms, the system compensates for and isolates inertial system temperature sensor faults in real time, thus resolving the instability of the inertial navigation system's temperature compensation function and improving the reliability and stability of navigation calculations.

CN122708770APending Publication Date: 2026-09-08BEIJING INST OF AEROSPACE CONTROL DEVICES
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Patent Information

Application Number
CN202610951036.0
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2026-06-29
Publication Date
2026-09-08

AI Technical Summary

Technical Problem

Temperature compensation is difficult to achieve in inertial navigation systems, and temperature sensor failures lead to low stability of inertial navigation systems. Existing technologies have limitations in improving sensor reliability and redundancy design.

Method used

A composite inertial system with redundant design uses temperature sensors for self-testing and mutual testing, and a collaborative algorithm to fit the output curve for real-time compensation and fault isolation. A temperature compensation fault isolation selection mechanism is established to verify and isolate faulty sensors in real time.

Benefits of technology

It improves the reliability and stability of navigation calculation in inertial navigation systems, enables rapid assessment of temperature sensor failures, reduces the impact of failures, and enhances the temperature compensation fault isolation capability of inertial systems.

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Abstract

A redundancy-based temperature-compensated fault isolation method for composite inertial systems (CIS) first collects output data from each temperature sensor in the CIS system. By performing self-checks and mutual checks on the outputs of each temperature sensor, the faulty temperature sensor is located. When a fault occurs in the composite inertial navigation system, a linear estimation method is used to estimate the predicted value of the temperature sensor output at the time of the fault. The difference between the predicted value and the fitted value is compared. If the difference is less than a design threshold, the predicted value of the faulty temperature sensor is output, thus isolating the faulty temperature sensor. Temperature-compensated fault isolation can solve the problem of quickly assessing abnormal temperature sensor outputs in composite inertial systems. Through temperature sensor redundancy and output data fitting, it improves the reliability and stability of navigation calculations in the inertial navigation system.
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