Fiber optic gyro reliability prediction model

Abstract

The invention discloses a fiber optic gyro reliability prediction model. The fiber optic gyro reliability prediction model is characterized in that 1, a fiber optic gyro comprises an optical path part and a signal processing circuit part; and 2, in a failure rate formula, lambda b1 represents a basic failure rate of the optical path part; a signal processing circuit failure rate is shown in the patent specification; lambda pi represents a work failure rate of a certain component; and Ni represents the number of the component; piK represents a type factor and shows that the fiber optic gyro is an open loop or is a closed loop; piC represents a structure factor and shows that the fiber optic gyro has a single axis, double axes or three axes; piT represents a temperature factor; and piE represents an environment factor.

Description

technical field [0001] The invention relates to device reliability prediction technology, in particular to a fiber optic gyroscope reliability prediction model. Background technique [0002] From the 1970s to the present, after nearly 40 years of research and development, the fiber optic gyroscope technology has been quite mature, and has a good engineering background. It has become more and more important, and the index data to clarify its reliability level has become an urgent need for engineering. As a multi-technology product integrating light, mechanics and electricity, the fiber optic gyroscope has many factors that affect its reliability, mainly in the following aspects: (1) light source module failure, including failure modes such as optical power drop and spectral instability; (2) Fiber optic coupler failures, including failure modes such as fiber breakage; (3) Y waveguide failures, including failure modes such as electrode failure, waveguide failure, and coupling ...

AI Technical Summary

Problems solved by technology

The reliability prediction of fiber optic gyroscopes in China is based on treating the gyroscope as a small system, applying the series model, and then combining the 299C, 217F and other domestic and foreign reliability prediction manuals to find the sum of the failure rates of the corresponding components. This method is as follows Point defects: (1) Due to the difference in the production process level of domestic and foreign components, the reliability level is not the same, and the direct application of foreign reliability manual data will lead to deviations in the expected results; (2) The domestic reliability prediction manual (299C ), there is no data on the failure rate of new optical devices (such as Y waveguide, light source components, etc.) used in fiber optic gyroscopes, and some development units use approximate methods (such as directly using photodiodes to approximate photodetector components), resulting in errors in estimated results larger

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