GB/T 41397-2022 in English

《GB/T 41397-2022生产过程质量控制 故障诊断》由TC124（全国工业过程测量控制和自动化标准化技术委员会）归口，主管部门为中国机械工业联合会。

Fault diagnosis of quality control in production process

1 Scope

This document specifies the equipment fault diagnosis process, diagnosis elements and diagnosis methods of digital workshop in discrete manufacturing field.

This document is applicable to guide the discrete manufacturing field of digital locomotives for production process quality control to carry out fault diagnosis.

2 Normative References

The contents of the following documents constitute an essential clause of this document through normative references in the text. Among them, only the version corresponding to the date of the reference document is applicable to this document; The undated reference document whose latest version (including all amendments) applies to this document.
GB/T 7826-2012 System Port J Reliability Analysis Technology Failure Mode and Impact Analysis (EMEA) Program
GB/T 22394.1-2015 Machine Condition Monitoring and Diagnostic Data Interpretation and Diagnostic Techniques Part 1: General
GB/T 37942-2019 Condition Monitoring of Quality Control Equipment in Production Process

3 Terms and Definitions

The following terms and definitions apply to this document.

3.1 Anomaly

Irregularity or abnormality in a system, deviating from the standard state.

[Source: GB/T 20921 2007, 5.4]

3.2 Descriptor

Data items derived from original or processed parameters or external observations.

[Source: GB/T 20921-2007, 7.2]

3.3 Failure

Equipment loses the ability to perform a specified function.

Note: Failure is an event different from failure, and failure is a state.

[Source: GB/T 20921-2007, 2.7]

3.4 Failure mode

Observable failure effect.

[Source: GB/T 20921-2007, 5.6]

3.5 Fault

The state in which a part or assembly of a machine is placed when it deteriorates or an abnormal state occurs that may cause the machine to fail.

Note 1: Failure may be the result of failure, but failure may also exist without failure

Note 2: Planned activities or lack of external resources are not failures.

[Source: GB/T 20921 2007, 2.8]

3.6 Confidence level

Quality criteria indicating the accuracy of diagnosis.

Note 1: It is expressed as a percentage.

Note 2: It represents the cumulative effect of error sources on the final reliability or confidence level of the accuracy of the output results, which can be determined by calculation or weighted evaluation system.

[Source: GB/T 23713.1-2009, 3.2]

3.7 Diagnostics

Symptoms and syndromes examined to determine the nature (type, condition, degree) of failure or failure.

[Source: GB/T 20921-2007, 2.6]

4 Abbreviations

The following abbreviations apply to this document.

FTA: Fault Tree Analysis
FMEA: Failure Mode and Effects Analysis
FMECA: Fault Mode, Effects and Criticality Analysis
FMSA; Failure Mode Symptoms Analysis

5 Fault diagnosis process

Fault diagnosis mainly includes five parts: fault detection, fault pattern recognition, fault location, fault evaluation and fault decision. The fault diagnosis process is shown in Figure 1.

1 Scope
2 Normative References
3 Terms and Definitions
4 Abbreviations
5 Fault diagnosis process
6 Fault diagnosis elements
7 Fault diagnosis method