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The expert system is applied to the fault diagnosis of mine power supply network, and a way to realize the fault diagnosis expert system of mine power supply network is put forward. In this paper, the mine power supply network fault diagnosis expert system is based on Visual C ++ 6.0 development environment and SQL2008 database development and design, the use of configuration technology scalability,...
Rule based expert systems are widely used in online fault diagnosis systems, while failure mode, effects and criticality analysis (FMECA) is a widely used information intensive method to gather failure modes and its related information. We utilize FMECA worksheet as a backbone to authorize generalized rule base against device types, and present how to commission this generalized rule base to an operable...
With the rapid development of space technology, the working safety and reliability of aero engine have attracted more and more attention. As the heart of the plane, aero engine has the high cost of development, and the quality of its performance affects directly the flight efficiency, reliability and economy of aircraft. It is difficult to diagnose the failure of aviation equipment by using few sample...
This paper is based on the background of the development of aviation fault diagnosis expert system. To solve the engineering problems of the low interpretation efficiency encountered in the construction of expert system, a reasoning machine based on the combination of Fault Tree (FT) and Generalized Regression Neural Network (GRNN) is brought forward. First, the FT model is built and simplified. Second,...
The main fault diagnosis algorithms of traditional substation are based on the protections and breakers. And they have not concerned the influence of abnormal communication network to the stable operation of the intelligent substation. Based on the questions mentioned above, this paper introduces the fault information of the intelligent substation first of all, which contains the static configuration...
Introduce the manual intervention mechanism into the traditional fault diagnosis expert system, with which allowing the human experts to intervene the reasoning process and modify the results outputted by the expert system. Extract the pre-conditions and final results from the manual intervention behaviors, and store them in expert system knowledge base. Redesign the self-learning inference engine,...
Tosolve the complicated variety of vehicle faults and the difficulty of real-time diagnosis, a kind of vehicle fault diagnosis system based on the expert system is presented. This paper uses expert knowledge of vehicle fault diagnosis to build the knowledge base with the knowledge representation of fuzzy production rules, and designs the forward inference machine to implement the real-time vehicle...
At present, aircraft fault diagnosis methods have been used in many engineering applications. Among them, most methods considered only a single case-based or rule-based diagnostic method, therefore the efficiency of those fault diagnosis methods need to be improved. In this paper, it proposed and studied a fault diagnosis method based on the integration of case and rule reasoning, and introduced the...
Extension expert system is a new kind of expert system, which is formed after the introduction of Extenics. It provides new methods for knowledge representation, matching and reasoning of expert system. First the theoretical framework of Extenics is introduced including the base-element theory, extension set theory and extension logic; Then the extension expert systems is analyzed, including extension...
For urban sewage treatment process of A2O, a fault diagnosis method based on parameter estimation of Activated Sludge Model No.2 (ASM2) model and expert system is proposed. Firstly, the A2O process is simulated based on Activated Sludge Model No.2 (ASM2) model, and then according it to calculate the estimated value of components parameter of biochemical reaction process, and compare it with the real...
To solve the fault diagnosis problem of relay control circuits widely used in missiles, this paper designs a rule-based fault diagnosis expert system. This system includes five modules: knowledge acquisition module, problem solving module, reasoning explaining module, interface module and management and control module. To solve the problem of knowledge acquisition known as the bottleneck of expert...
To solve the computer description of Fault tree model, a new method based on the extended fault tree nodes' nonlinear linked lists representation is put forward according to the analysis of the fault tree mathematical model and inference mechanism. With this method, the process of fault tree diagnosis can be fully represented of this method and the process of fault tree diagnosis inference mechanism...
A certain type of helicopter is widely used in China. Aiming at the characteristics of fault diagnosis, the expert system of electrical and instrument system of helicopter is established based on Visual Prolog. The knowledge of the system is acquired by manual method. The knowledge base is established according to the production rule. The forward reasoning is used for inference of fault diagnosis...
Taking complex electric equipment for engineering background, this paper researches the application of information fusion in fault diagnosis. First, this paper makes a brief introduce about the concept and availability of information fusion technology in fault diagnosis, then for the requirement of practical engineering application, it gives a describe about the hierarchical model and the method correspond...
The structure of cars is increasingly complex, the fault type, fault phenomena and fault causes of cars is more complicated, therefore ordinary users are stranded when fault happens. To solve the above questions, this paper outlines a kind of on-vehicle fault diagnosis expert system based on fault tree — neural network ensamble. The knowledge base of the expert system is divided into two parts, the...
This paper deals with the application of an intelligent tutoring approach to delivery training in diagnosis procedures of a Power System. In particular, the mechanisms implemented by the training tool to support the trainees are detailed. This tool is part of an architecture conceived to integrate Power Systems tools in a Power System Control Centre, based on an Ambient Intelligent paradigm. The present...
As the core of fault diagnose expert system (FDES), perfection level of inference engine and fault knowledge base is one of the most important criteria to evaluate FDES' efficiency. And how to update the diagnose knowledge with the change of system structure robustly becomes the critical issue in designing a fault diagnose expert system. Aimed at the bottlenecks in current FDES design process, this...
The NC machine is a tool which is indispensable in industrial manufacturing. In recent years, with network, computer and other related technical development, It provide a new power to numerical control technology. The main idea of this article is description the networked CNC machine fault diagnosis which based on expert system
Taking Visual Basic 6.0 as the development tool, design the fault diagnosis expert system of CNC machine, which is a kind of knowledge-based intelLigent computer appLications program, it is made up of the knowledge base, reasoning machine, dynamic facts Library, explain mechanism, knowledge acquisition mechanism and user interfaces etc.
Extenics is to use formal model to expand the possibilities of things and the laws and methods of innovation, and it is a novel subject in solving non-compatible problem. Extension logic provides a new mathematical tool for building expert system and makes representation of knowledge and method of reasoning similar to human's thinking manner. Through the research on the matching principle of extension...
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