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Hardware circuit FMEA method with weight considered

A hardware circuit and weighting technology, which is applied in electronic circuit testing, electrical testing/monitoring, etc., can solve the problem that reliability analysis technology cannot take into account accuracy and calculation amount at the same time, and achieve objective and accurate evaluation results and reduce repetition rate.

Inactive Publication Date: 2019-05-21
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problem that the existing product and system reliability analysis technology cannot take into account the accuracy and calculation amount at the same time, the present invention provides a FMEA method considering the weight

Method used

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  • Hardware circuit FMEA method with weight considered
  • Hardware circuit FMEA method with weight considered
  • Hardware circuit FMEA method with weight considered

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specific Embodiment approach 1

[0013] Specific implementation mode one: combine figure 1 The present embodiment is described, and a weight-considered hardware circuit FMEA method provided in the present embodiment specifically includes the following steps:

[0014] Step 1, determining the evaluation factor of each influencing factor of each failure mode of the hardware circuit;

[0015] Step 2, applying the AHP to establish the judgment matrix of each influencing factor, and then obtaining the weight of each influencing factor of the failure mode;

[0016] Step 3, using the evaluation factors and weights obtained in the above steps to obtain the risk coefficient of each failure mode;

[0017] Step 4, sorting the risk coefficients of various failure modes according to their numerical value.

[0018] The method of the invention can greatly reduce the calculation amount of the algorithm while ensuring that the failure risk measurement is scientific and effective.

specific Embodiment approach 2

[0019] Specific embodiment 2: The difference between this embodiment and specific embodiment 1 is that the specific determination process of the evaluation factor described in step 1 is:

[0020] The influencing factors for determining the kth failure mode of the hardware circuit are: occurrence degree Severity M

[0021] Then, the evaluation factor of the occurrence degree of the kth failure mode of the hardware circuit for:

[0022]

[0023] in, Indicates rounding up, θ k is the occurrence rate of the kth failure mode, and the maximum value σ=max(θ 1 ,…,θ k ,...); θ k It can be obtained by searching the hardware circuit technical manual or the manufacturer's product manual.

[0024] The Evaluation Factor of the Severity of the kth Fault Mode of Hardware Circuit for:

[0025]

[0026] Among them, Q is the total number of devices in the hardware circuit; when the kth failure mode occurs in the hardware, the modules whose functions are affected include ρ ...

specific Embodiment approach 3

[0035] Specific implementation mode 3: The difference between this implementation mode and specific implementation mode 2 is that the step 2 specifically includes the following process:

[0036] If only the single multiplication of S (severity), O (occurrence), and D (detection) determines the risk value of the failure mode, in a specific hardware circuit, when the evaluation value of a certain influencing factor is too high, other The role of influencing factors is invalid; therefore, this method introduces the relative weight of each influencing factor. At the same time, the Analytic Hierarchy Process (AHP) is used to eliminate the subjective influence in the weight determination method as much as possible. The specific steps of each influencing factor weight set are as follows:

[0037] Step two one, use a ij Indicates influencing factors right The relative importance value and then construct the judgment matrix, i, j=1,...,n, the specific form of the judgment matrix ...

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Abstract

The invention provides a hardware circuit FMEA method with weight considered, which belongs to the technical field of product and system reliability analysis. The evaluation factor of each influencingfactor of each failure mode of the hardware circuit is firstly determined; then, an analytic hierarchy process is used to establish a judgment matrix for each influencing factor, and the weight of each influencing factor of a failure mode is further obtained; by using the obtained evaluation factor and the weight, the risk factor of each failure mode is obtained; and the risk factors of the failure modes are finally ranked according to the values. The problem that the accuracy and the calculation amount can not be considered at the same time by the existing product and system reliability analysis technology can be solved. The method provided in the invention can be used to quickly perform failure mode influence analysis on the hardware circuit.

Description

technical field [0001] The invention relates to a hardware circuit FMEA method, which belongs to the technical field of product and system reliability analysis. Background technique [0002] Failure Mode Effects Analysis (FMEA) is an effective method for product and system reliability analysis. Mainly through the analysis of possible failure modes of products or systems and their causes and effects, risk assessment of possible failure modes, and then rational allocation of limited resources, formulate preventive measures to control high-risk failure modes, thereby minimizing risks . The most important step in the FMEA process is the risk assessment of possible failure modes. The calculation method of the risk assessment index (risk priority number RPN) in the traditional FMEA method is: RPN = S (severity) * O (occurrence) * D (M). However, it is not only difficult to accurately evaluate the three risk factors with this calculation method, but also the RPN repetition rate ...

Claims

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Application Information

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IPC IPC(8): G05B23/02G01R31/28
Inventor 俞洋杨智明肖紫文贾绍华彭喜元
Owner HARBIN INST OF TECH
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