Transition mode operation fault detection method and system

Abstract

The invention discloses a transition mode operation fault detection method and system, and belongs to the field of industrial process abnormity monitoring. The invention provides a novel transition process operation stage division method, offline modeling is carried out in each stage by adopting a thought of projecting from a non-stationary process to a stationary process, an instant learning thought is adopted in an online monitoring stage, the operation stage to which online data belongs is judged firstly, then test statistics are extracted and solved according to offline rule features, and further fault detection is performed. According to the method, the transition mode operation stage division strategy has very high interpretability, the vacancy that non-same-order difference stationary variables are not considered in similar methods is filled in modeling and monitoring, the control limit is further tightened by adopting the instant learning thought during online monitoring, and compared with a traditional monitoring method, the monitoring process is refined, the monitoring information is enriched, and the monitoring accuracy is improved.

Description

technical field [0001] The invention belongs to the technical field of transition mode monitoring in industrial manufacturing process, and more specifically relates to a transition mode operation fault detection method and system. Background technique [0002] Due to factors such as changes in the external environment, changes in the production plan, or inherent characteristics of the process, the production process has multiple stable working conditions. When switching between different stable states, the system changes slowly until it transitions to another mode, which is called a transition mode. During this process, frequent operations by the operator will be involved, and the state of the system will change continuously, which will undoubtedly greatly increase the probability of failure. In addition, compared with the stable stage, it is very easy to produce poor quality or even unqualified products in the transition mode, so the monitoring of this process has strong p...

AI Technical Summary

Problems solved by technology

[0006] Aiming at the defects of related technologies, the purpose of the present invention is to provide a transition mode operation fault detection method and system, aiming to solve the problem of low accuracy and sensitivity of existing transition mode fault detection methods

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