Auxiliary identification method for failure mode

Abstract

The invention discloses an auxiliary identification method for a failure mode. The method comprises the steps of obtaining a function requirement specification of an analysis object, dividing an influence interval based on an unexpected function influence degree, and defining the failure mode based on the divided interval, carrying out failure mode labeling and associating a hardware failure mode.The invention provides a standardized computer-aided failure mode definition technology. A failure mode is defined based on an unexpected representation form of a function specification, and a failure mode association relationship between an upper layer and a lower layer and mapping of the function failure mode to hardware are established through relevance of the failure mode and the function specification, decomposition and distribution of product design function specifications and design definition of hardness. Compared with the existing failure mode analysis method, the failure mode definition method based on the function specification is realized, and the problems of incomplete analysis and low efficiency caused by the fact that the traditional failure mode analysis depends on empirical analysis are improved.

Description

technical field [0001] The invention relates to the field of system safety technology research, in particular to an auxiliary identification method for failure modes. Background technique [0002] Failure Modes Analysis (FMA) is the basic method and means of reliability and safety design of various equipment and products, the core of Failure Mode and Effect Analysis (FMEA) and the equipment availability Fundamentals of Design Analysis. FMEA technology originated in the United States in the mid-1950s. It was first proposed and applied by Grumman in the development of a certain type of aircraft, and later formed the standard MIL-STD-1629, which was widely used in military equipment, civil aviation, medical treatment, and automobiles. , energy and other fields of manufacturing. According to the latest American reliability engineering standard GEIA-STD-0009, failure mode refers to the appearance of consequences caused by product function failure. Failure mode analysis is a sp...

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Problems solved by technology

[0006] b) Inexperienced designers tend to overlook some failure modes, resulting in omissions in analysis;

[0007] c) The correlation of failure modes between each level depends on manual subjective judgment, which is prone to errors;

[0008] d) The analysis efficiency is low and consumes resources;

[0009] e) The description of the failure mode is inaccurate and difficult to understand

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