Study On Back-up Panel Human-machine Interface Mathematical Modeling And Optimization Method Of Main Control Room In Nuclear Power Plants

Back-up panel is a safeguard and an important part of an advanced main control room,which maintains nuclear power plant functional or steers the plant into safe condition whendigital control system does not work. Back-up panel’s human-machine interface layout affectsoperators’ cognition, performance and efficiency, and determines plant safety and beneficialresult. It is thus obvious that researches on back-up panel layout have theoretical and practicalsignificance.In this paper, the research object is the layout of back-up panel in nuclear power plantmain control room. A problem is pointed out that the layout result designed by experimentcomes out in random and subjectivity. Research on human-machine interface layout based onpartical swarm optimization is conducted, and the research items are listed as follows.Nuclear power plant main control room human-machine interface layout relatedergonomics standards are analyzed. Principles of displays, controls and layout of panel aresummed up. The importance of components, operational frequency, operational order,correlation and compatibility principles of nuclear power plant main control roomhuman-machine interface layout are proposed as rules of nuclear power plant main controlroom human-machine interface layout.In accordance with the distinguishing features of the back-up panel of human-machineinterface, the importance of components, operational frequency, operational order, correlationand compatibility principles are analyzed and mathematic model is set up. For the reason ofthe whole design of panel layout, layout principles and their relations must becomprehensively considered, and thus structure an objective function which transforms theabstract problem into a mathematic problem.A Monte Carlo PSO test and research of layout method fitting the features of thisproblem are constructed. By constructing standard test interface, rationality and usability oflayout objective function are tested with PSO, and effectiveness of the method solving thelayout problem is tested. For analyzing the distribution of the layout result of the standard testinterface, a probability density function with multinomial power and two kinds of methods ofleast squares solving the probability density function are structured. An analysis method forexperiment result is established based on statistics.Based on the mathematic model and objective function PSO is adopted to optimize thelayout of back-up panel. With the help of Monte Carlo experiment, a test and a research oninertia weight, learning factor, particle velocity, particle amount and the maximum iteration step are conducted. Degressive-constant continuous evolution tactics and cyclic shift tactics oflearning factor for improving inertia weight are proposed. Optimal set up method of particlevelocity, particle amount and maximum iteration is proposed. And a PSO layout optimizationprocedure is provided.ICPPSO Suite system based on Visual Basic is compiled for PSO components layout forsolving the optimization problem. A layout implement for back-up panel in nuclear powerplant main control room is completed with ICPPSO Suite. The result of the layout implies thatthe ICPPSO Suite system is feasible and effective.