Fiber optic gyro inertial measurement product calibration parameter long-term stability defect detection method

Abstract

The invention provides a fiber optic gyro inertial measurement product calibration parameter long-term stability defect detection method. Firstly, the static stability comprehensive test is performed on a fiber optic gyro inertial measurement product under the long-term stability test, and whether the start-up time, one-time power-on stability and multiple-time power-on repeatability of the product meet the technical requirements of the product specification is assessed synchronously; then the position flipping test is performed to confirm whether the fiber optic gyro inertial measurement product can keep stable after the flipping operation involved in the parameter calibration test, i.e., whether it meets the requirement of the primary power-on stability of the product specification is confirmed; and the calibration parameter long-term stability test is performed on the fiber optic gyro inertial measurement product passing the test. The method detects whether the fiber optic gyro inertial measurement product has the hidden trouble of over-poor long-term stability of the calibration parameters through the short-term and low-frequency tests so as to improve the success rate of the product passing the long-term stability test, save the equipment resources and the time cost and accelerate the production efficiency of the product.

Description

technical field [0001] The invention relates to a method for evaluating long-term stability of calibration parameters of inertial measurement products, in particular to a method for detecting long-term stability defects of calibration parameters of fiber optic gyroscope inertial measurement products by conducting short-term tests, and belongs to the technical field of inertial measurement. Background technique [0002] The fiber optic gyroscope inertial product is a key device that is sensitive to the angular velocity and linear acceleration of the carrier and then completes navigation and guidance. According to the flight mission cycle, the validity period of the calibration parameters of fiber optic gyroscope products usually reaches several months or even years. For major tasks with high reliability requirements, the long-term stability test of fiber optic gyroscope products usually requires Proceed in accordance with the 1:1 time of the parameter validity period required...

AI Technical Summary

Problems solved by technology

Affected by temperature, vibration, storage environment and the characteristics of internal component materials, its calibration parameters will drift nonlinearly over time, and the long-term stability research is more complicated, and it is difficult to analyze various factors affecting long-term stability. It can only be confirmed by the final results of the long-term stability test of the fiber optic gyroscope inertial product, or estimated by the parameter change trend during the test

In most cases, limited by manpower and equipment resources, it is difficult to guarantee the long-term stability test once a day or even once a week, so when the fiber optic gyroscope inertial measurement products have poor long-term stability Defects are often not determined until the end of the entire set of tests or in the second half of the process, and subsequent processing includes troubleshooting and re-conducting long-term stability tests, resulting in an extremely lengthy product production cycle

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