Fault diagnosis expert system based on decision tree for industrial Ethernet network

Abstract

The invention discloses a fault diagnosis expert system based on a decision tree for an industrial Ethernet network. Firstly, an expert system comprising a knowledge base, an inference engine, a knowledge base management module, a knowledge acquisition module, an explanation facility and a control center is established; secondly, the knowledge base is utilized to contact the inference engine and the control center to obtain data required by the modules for storing a diagnosis rule, various pieces of data of the system and an intermediate result generated during the system diagnosis period; thirdly, comparison, commonly called as matching, is carried out between a condition part of a rule base and a content of a global data base through the inference engine, if matching is successful, a conclusion part is displayed, the global data base is modified according to an action part of an enable rule, the changed global data base can trigger a new rule, so that problem solving proceeds to the next state, and so forth, one problem is finally solved; and lastly, post processing is carried out through the inference engine, a new knowledge base is updated by the control center, so that the expert system is gradually improved.

Description

technical field [0001] The invention relates to the technical field of industrial Ethernet control systems, in particular to a decision tree-based industrial Ethernet network fault diagnosis expert system. Background technique [0002] PROFINET, launched by PROFIBUS International (PI), is a new generation of automation bus standard based on industrial Ethernet technology. As a strategic technological innovation, PROFINET provides a complete network solution for the field of automation communication, covering hot topics in the field of automation such as real-time Ethernet, motion control, distributed automation, fail-safe and network security, etc. And, as a cross-supplier technology, it can be fully compatible with industrial Ethernet and existing fieldbus (such as PROFIBUS) technology to protect existing investment. [0003] Over the past few years, industrial machine networks have experienced explosive growth in size. The application of the network has penetrated into e...

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Problems solved by technology

[0009] Third, the conventional fault detection method of fault detection needs to establish a mathematical model, and the complexity and accuracy of the mathematical model are difficult to meet the real-time requirements of high-speed networks; the simplified mathematical model leads to unsatisfactory actual control effects

[0010] Fourth, fault representation Due to the diversity and continuous update of network applications, it is not yet possible to find a clear function that can represent all application layer faults

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