Field reliability evaluation method and system for rail transit electronic control devices

Abstract

The invention discloses a field reliability evaluation method and system for rail transit electronic control devices. The field reliability evaluation method comprises the steps of 1) acquiring original field operating data of all electronic device devices in a train, calculating the lifetime of breakdown electronic control devices and the truncated lifetime of normal electronic control devices in the electronic control devices according to the original field operating data, and acquiring lifetime data of the electronic control devices; 2) performing fitting on the lifetime data of the breakdown electronic control devices in the acquired lifetime data according to various different distribution models, and determining a target distribution model conforming to current lifetime data distribution characteristics according to a fitting result; and 3) performing reliability evaluation on the lifetime data according to the target distribution model. The field reliability evaluation system comprises a data acquisition and processing module, a lifetime distribution analysis module and a reliability evaluation module. The field reliability evaluation method and system can realize field reliability evaluation for the electronic control devices, and have the advantages of simple implementation method, high evaluation precision, high reliability and wide application range.

Description

technical field [0001] The invention relates to the technical field of rail transit, in particular to an on-site reliability evaluation method and system for an electronic control device of rail transit. Background technique [0002] The progress of science and technology promotes the rapid development of the rail transit industry. As a vehicle-mounted device integrating control, network communication and fault diagnosis, such as electronic control modules and electronic control systems, the reliability of electronic control devices is crucial to the safety and reliability of train network systems. It is very important, and users have higher and higher requirements for its reliability. [0003] At present, there are few studies on the reliability evaluation of rail transit electronic control devices, which are usually based on experiments or simulations. A large amount of reliability information is generated during the development, test, and operation of electronic control d...

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Problems solved by technology

[0003] At present, there are few studies on the reliability evaluation of rail transit electronic control devices, which are usually based on experiments or simulations. A large amount of reliability information is generated during the development, test, and operation of electronic control devices, and the reliability and service life of products More accurate analysis can only be obtained by relying on field data, but based on tests or simulations, operational reliability information cannot be effectively used, and effective statistical analysis of reliability information is lacking, so the evaluation accuracy and credibility are not high

The existing on-site operational reliability evaluation methods are usually based on a specific type of distribution (such as exponential distribution), that is, the evaluation is performed on the premise that the life distribution is assumed to be a specific type of distribution, but the operating conditions of electronic control devices are complex, and the specific type of distribution is directly used There are large errors in the evaluation, and accurate evaluation results cannot be obtained, so it cannot be directly applied to the evaluation of rail transit electronic control devices

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