An Application Research Of Subway's Automatic Train Operation System Using Grey System Theory

Recently , under the strategy of "Public Traffic First", many cities in the world constructed urban railway actively. In this background, the research on Automatic Train Control System (ATC) is up and doing and its fruit is plentiful and substantial. Automatic Train Operation System (ATO) is an important part of Automatic Train Control System. Its primary function is operating the train like a driver, insuring that the train is in the best state.Experience from former researchers has been summarized and the disadvantages also have been analyzed in this paper. The function and the purpose of ATO have been analyzed and Grey System Theory has been investigated. After the characteristic has been analyzed, the conclusion that ATO is a grey system has been confirmed. So, the superiority of grey theory can be exerted in ATO. And the insufficiency of former research can be offset in a measure.After the combining of Grey system theory and ATO has been proved to be reasonable, a new mode or ATO has been pointed out, that is ATO using Grey theory. When the information can be attained and the missions of ATO have been found out, ATO has been plotted in many sections. All the sections have been designed concretely based the Grey System Theory. The Grey Forecasting, the Grey decision-making and other parts of Grey System Theory have been used to built modules of ATO. All modules have been united to be an integrity system which can cooperate with other parts of ATC. The ATO based on Grey System Theory has been accomplished.The ATO based on Grey System Theory has been simulated. After making modeling for train and line, ATO based on Grey System Theory has compared with ATO based on Fuzzy Control. The comparing is on the following parameter : Punctuality, Precision of train stop , and comfort of passengers. Parameters have been introduced to quantify the effect of ATO. The rationality and the correctness have been confirmed by simulation. It improves the new ATO system is doable, this paper can be a basic for the following research.