CN-121994270-A - FMEA analysis method for multi-top event failure mode of optical fiber gyroscope

CN121994270ACN 121994270 ACN121994270 ACN 121994270ACN-121994270-A

Abstract

The application discloses a multi-top event failure mode FMEA analysis method of an optical fiber gyroscope, and relates to the technical field of optical fiber gyroscopes. The method comprises the steps of establishing a multi-top event failure mode database and management software, clicking a plurality of failure modes by the management software to generate a multi-top event failure mode assembly and a multi-top event failure tree, wherein the multi-top event failure tree comprises a plurality of bottom events, a plurality of middle events and a plurality of top events, and performing investigation and influence analysis on the failure modes by combining investigation priorities based on the failure mode assembly and the multi-top event failure tree. The FMEA analysis work when a plurality of top events occur simultaneously on the fiber-optic gyroscope is solved.

Inventors

YAN JIANGZHOU
XU JIAN
YANG YINCHUAN
XUE YONGJIA

Assignees

航天江南集团有限公司
贵州航天控制技术有限公司

Dates

Publication Date: 20260508
Application Date: 20251211

Claims (10)

1. A method of FMEA analysis of a fiber optic gyroscope multi-top event failure mode, comprising: establishing a multi-top event failure mode database and management software; Utilizing the management software to click a plurality of failure modes to generate a multi-top event failure mode assembly and a multi-top event fault tree, wherein the multi-top event fault tree comprises a plurality of bottom events, a plurality of middle events and a plurality of top events; And based on the failure mode assembly and the multi-roof event fault tree, the failure mode is checked and influence analysis is carried out by combining the checking priority.
2. The method of claim 1, wherein the multi-top event failure mode database is used to format and assemble failure modes of the fiber optic gyroscope to form a database, and wherein the management software is used to search and click on the required failure modes.
3. The method of claim 1, wherein the clicking a plurality of failure modes with the management software to generate a multiple-top event failure mode compilation and multiple-top event failure tree comprises: Selecting a plurality of failure modes at the management software interface; storing the selected failure mode into an analysis sequence to generate a failure mode analysis sequence; And combing all upper-level failure modes of the failure modes according to the failure mode analysis sequence, and generating a multi-top event failure mode assembly and a multi-top event failure tree.
4. A method according to claim 3, wherein said sorting all upper level failure modes of failure modes according to said failure mode analysis sequence, generating a multiple roof event fault tree, comprises: according to the failure mode analysis sequence, all links between each failure mode and the superior failure mode are combed to form DOT language; and importing the DOT language into drawing software to generate a multi-top event fault tree.
5. The method of claim 4, wherein importing the DOT language into drawing software generates a multi-top event fault tree, comprising: And importing the DOT language into the automatic drawing software of the open source script of the bell laboratory of the AT & T to generate a multi-top event fault tree.
6. The method of claim 1, further comprising, after the establishing the multi-top event failure mode database and management software: And clicking a single failure mode by using the management software to generate a single event failure mode assembly and a traditional event failure tree, wherein the traditional event failure tree comprises a plurality of bottom events, a plurality of middle events and a top event.
7. The method of claim 1, wherein the troubleshooting and impact analysis of failure modes in combination with troubleshooting priorities based on the failure mode compilation and the multiple-top event fault tree comprises: carrying out priority confirmation on the failure mode assembly by combining the checking priority; Gradually checking the failure modes according to the failure mode assembly after the priority is confirmed, deleting non-failure events in the multi-top event fault tree, and gradually compressing the multi-top event fault tree until all the failure modes are confirmed; and carrying out impact analysis description on the reserved failure links of the multi-roof event fault tree to form complete failure link description.
8. The method of claim 7, wherein prioritizing the failure mode assembly in conjunction with troubleshooting priorities comprises: And carrying out priority confirmation on the failure mode assembly according to a preset carding path and an investigation angle, wherein the carding path comprises connection integrity, functional integrity, manufacturing process and service life section/environment event, and the investigation angle comprises design rationality, human-caused faults, processing test equipment, devices and auxiliary materials, external environment, operation rules and test verification methods.
9. An FMEA analysis device for a multi-top event failure mode of a fiber optic gyroscope, comprising: the database establishing module is used for establishing a multi-top event failure mode database and management software; the system comprises a multi-top fault tree generation module, a multi-top event fault tree generation module and a management software, wherein the multi-top fault tree generation module is used for clicking a plurality of failure modes by utilizing the management software to generate a multi-top event failure mode assembly and a multi-top event fault tree; and the troubleshooting and analyzing module is used for troubleshooting and influencing and analyzing the failure mode based on the failure mode assembly and the multi-top event fault tree and combining the troubleshooting priority.
10. An electronic device, comprising: A processor and a memory arranged to store computer executable instructions which when executed cause the processor to perform the steps of the method of any of claims 1 to 8.

Description

FMEA analysis method for multi-top event failure mode of optical fiber gyroscope Technical Field The application relates to the technical field of fiber optic gyroscopes, in particular to a fiber optic gyroscope multi-top event Failure Mode FMEA (Failure Mode AND EFFECTS ANALYSIS) analysis method. Background The optical fiber gyroscope is an angular velocity measuring device combining various technologies and devices such as an optical path, a circuit, software (including a control algorithm), a structure and the like. Its design, development, production, and application cover the knowledge of various disciplines of optics, mechanics, electronics, control, software, materials, etc., its failure mode and impact mechanism are various. In the actual fault checking process, the condition that a plurality of failure modes exist simultaneously is also found. Taking the gyroscope output abnormality caused by the photoelectric detector abnormality in the debugging process of a certain optical fiber gyroscope as an example, a multi-top event failure mode such as inter-axis interference, output jump caused by external metal disturbance, abnormal debugging result and the like exists. In each failure mode, some are connected, some are independent, some require environmental excitation, and some are due to matching problems among devices. Multiple fault trees are needed to be combed in the multi-top event failure mode, and integration among the fault trees is lacked, so that great inconvenience is brought to fault investigation and subsequent failure mode analysis. At present, most of FMEA analysis researches of a multi-top event failure mode of a fiber-optic gyroscope are focused on a reliability prediction stage and a common fault tree analysis stage. For the reliability of optical devices for fiber optic gyroscopes, there are some related studies at home and abroad, but the disclosed studies are limited to civilian fields only. Reliability research of the fiber-optic gyroscope is not developed in a large-scale system at home. Therefore, it is necessary to develop failure modes and impact analysis in reliability engineering. The prior related researches are as follows (1) Lin Xiangyun et al published "FMEA and FTA application research in fiber optic gyro reliability engineering" in design and research and development ", analyzed the failure mode and influence of fiber optic gyro from the angles of components and excitation stress, 202310099338.6 describes a model-based multi-state fault tree automatic construction method, the used system multi-state expression is based on multi-state description of components, different from the traditional tree construction principle of" two states "of tree construction, the normal state and failure level (can be multiple failure modes) of each component in the system are described in the multi-state component model standardization, and 20201101040487. X describes a fault association tree generation method and device, which can automatically generate fault trees according to the association strength. The existing FMEA method is based on the level of the component and the angle of a physical failure model, and most of fault trees on which the fault tree depends are standard fault trees of single-top events. The patent with the application number 202310099338.6 adopts a multi-state fault tree, but the multi-state description of various failure modes of the component is multi-state description, and can be used for constructing a failure mode database of the component itself, and is not a multi-top event failure mode technical problem based on the optical fiber gyroscope. The same patent application No. 20201102487. X, while focusing on the relevance of individual failure modes, is still directed to failure analysis of single roof events. Disclosure of Invention The application aims to provide a fiber optic gyroscope multi-top event failure mode FMEA analysis method which is used for solving the FMEA analysis work when a plurality of top events occur to a fiber optic gyroscope at the same time. In order to achieve the above purpose, the application adopts the following technical scheme: in one aspect, the application provides a method for FMEA analysis of a multi-top event failure mode of a fiber optic gyroscope, comprising: establishing a multi-top event failure mode database and management software; Utilizing the management software to click a plurality of failure modes to generate a multi-top event failure mode assembly and a multi-top event fault tree, wherein the multi-top event fault tree comprises a plurality of bottom events, a plurality of middle events and a plurality of top events; And based on the failure mode assembly and the multi-roof event fault tree, the failure mode is checked and influence analysis is carried out by combining the checking priority. On the other hand, the application also provides an FMEA analysis device of the multi-top event failure mode of the optica