Study On Human-machine Interface Evaluation Method For Main Control Room Of Nuclear Power Plant

With the development of nuclear power, safety has become the foundation on which nuclear power can exist and develop. The well designed human-machine interface plays an important role in reducing human error and ensuring the safe operation of nuclear power. Human-machine interface evaluation is an important means to ensure the design quality of human-machine interface. The scientific human-machine interface evaluation theory and method is the premise and the basis of correct evaluation. Therefore, it has great theoretical and practical significance to establish and perfect human-machine interface evaluation theory and correlative technique.In this paper, human-machine interface evaluation for main control room of nuclear power plant was selected as object investigated. The necessary of human-machine interface study was analyzed. The status of evaluation theory was reviewed. The evaluation problem of complicated system with multi-attribute, multi-hierarchy and incomplete information was studied. The key technology issues include the selection of evaluation index, the construction of index system, the assignment of weight, the evaluation of incomplete information system and so on. The main contributions are summarized as follows:Firstly, the methods of index selection were reviewed and analyzed. On this basis, the method of index selection based on multi-factor arithmetic was put forward by using system theory, considering the relativity, the significance and the validity of index. At the same time, the validity examination of index was studied exploringly. Grey relation analysis was used to exam the validity of index. The investigation example proves the validity and feasibility of the proposed method. On this basis, the correlative standard and the influence factor of human-machine interface evaluation for main control room of nuclear power plant were analyzed; the evaluation index system of human-machine interface for main control room of nuclear power plant was constructed.Secondly, Grey theory was imported into analytic hierarchy process. The reliability coefficient was constructed by the similarity degree. The method of weight assignment based on reliability coefficient was proposed. The quantitative representation of the cognitive characteristic was carried out. The synthesis of multi-expert's evaluation information was resolved. At the same time, two kinds of judgment matrix were constructed by using of grey relation analysis. The method of weight assignment for multi-criterion based on grey relation analytic hierarchy process was proposed. The process and the arithmetic of weight assignment were presented. The stability of weight assignment results was analyzed. The example proves that the first judgment matrix fits in with consistent requirements spontaneously, and the proposed method is suitable for the problem of weight assignment for multi-criterion.Thirdly, incomplete information evaluation method of human-machine interface was discussed. Interval grey number was used to deal with incomplete information of human-machine interface. The decision-making problem of complicated system with incomplete information was studied. Based on grey theory and TOPSIS, the grey interval absolute relation analysis model and the grey interval TOPSIS model were established. The grey interval nearness degree was presented. The incomplete information evaluation model based on nearness degree was established. The evaluation example proves its rationality and validity. At the same time, the evaluation problem of multi-hierarchy system with incomplete information was studied. The method of multi-hierarchy evaluation based on grey interval clustering analysis was proposed. The multi-hierarchy evaluation model of grey interval clustering based on representative white weight function was established. The process and the boundary conditions of the method were given. The evaluation example proves its feasibility.Finally, the quantification methods of subjective index and objective index were studied. On this basis, the human-machine interface comprehensive evaluation software for main control room of nuclear power plant was developed. The evaluation software was used to evaluate a part panel design of back-up panels'human-machine interface in the main control room of the nuclear power plant. By analyzing the evaluation results, the suggestions of design improvement were presented. The theory and method which have been proposed in this paper was confirmed.