【正文】 和控制規(guī)則的制定,一方面依靠對以往交通數(shù)據(jù)的統(tǒng)計和運算,得出合理的隸屬函數(shù)和控制規(guī)則；另外一方面就是靠長期積累起來的經(jīng)驗,而經(jīng)驗的獲得要經(jīng)過長期的實踐積累。另外,可以采用遺傳算法來優(yōu)化隸屬函數(shù)和控制規(guī)則,使系統(tǒng)具有更高程度的智能化。提高城市交通網(wǎng)的通行能力是一個綜合性的問題,交通信號控制只是其中一個措施,除此之外,還應(yīng)加強交通法規(guī)建設(shè)和交通管理措施。參考文獻(xiàn)[1] 劉智勇. 智能交通控制理論及其應(yīng)用[M]. 北京: 科學(xué)出版社, 2003[2] 荊便順. 道路交通控制[M]. 人民交通出版社, 1995[3] 史忠科, 黃輝先, 曲仕茹, [M]. 科學(xué)出版社, 2003[4] 李江. 交通工程學(xué)[M]. 北京: 人民交通出版社, 2002,10[5] 楊兆升. 城市交通流誘導(dǎo)系統(tǒng)[M]. 北京: 中國鐵道出版社, 2004[6] 上海市交通安全教育學(xué)校編著. 道路交通標(biāo)志和標(biāo)線學(xué)習(xí)手冊[M]. 上海: 上海交通大學(xué)出版社, 1999,12致謝當(dāng)我完成這篇論文時,三年的研究生生涯即將結(jié)束,在我求學(xué)期間得到了許多人的幫助,借此機會表達(dá)對他們的感謝。從論文的選題到完成,他都給予精心的指導(dǎo),蘇老師治學(xué)嚴(yán)謹(jǐn),學(xué)識淵博,思想深邃,視野雄闊,為我營造了一種良好的精神氛圍。感謝王娟,魏晉燕,熊建芳同學(xué),在我寫論文期間給予我的幫助,你們頑強的求學(xué)精神和豁達(dá)的生活態(tài)度,時刻在感染著我,催我上進(jìn),同時感謝班里的所有同學(xué)。感謝董龍江先生在我求學(xué)及完成論文期間給予我的幫助。an,Chang39。s degree thesisDesign and realization of intelligent traffic control system based on PLCZhao YaniMentors Name Title : Su Shiling Associate ProfessorApply for graduate level : MasterPaper submission date : May 10, 2007Disciplines : Traffic Information Engineering and ControlThesis Defense Date : June 3, 2007Degreegranting units : Chang’an UniversityChairman of the defense mittee : Ju Yongfeng , ProfessorThe Dissertation reviewers : Professor Wu Zifang Zhao Zhongjie Associate ProfessorAbstractThe urban road traffic intelligent control technology is one of the hot spots of the current control of the field and the field of traffic engineering studies,has strong nonlinearity due to traffic control. Uncertainty, the traditional theory and method is difficult to be effectively controlled. Fuzzy control does not depend on the model of the intelligent control methods to control through the simulation of human thinking and experience, is a promising urban intelligent traffic control mode.In this paper, the standard single intersection as the object of study, the bination of timing control and fuzzy control intelligent traffic control. Intersection fuzzy control, in the state of nonpeak timing control during the peak period. Through research and design of the control rule base and inference unit to plete the design of the fuzzy algorithm to use MATALB software SIMULINK toolbox and fuzzy logic toolbox to plete the simulation of fuzzy control, and fuzzy control algorithm in the VB environment program development. The fuzzy control method, control and timing control of a bination play the advantages of the conventional timing control to overe the fuzzy control in the poor state of the control effect of the peak period.Keywords : single intersection, fuzzy control, intelligent control, programmable controllers The first chapter BackgroundUrban transport system is a socioeconomic blood circulatory system ”, is a measure of the progress of civilization of a city flag, with the continuous development of the social economy and expanding city size, trade and social activities of the city 39。s economic development and urban functioning.The fundamental way to solve the traffic problems in the city, there are two, the first is to accelerate the planning and construction of road facilities, improve the urban road network system, this method is an extensive development approach. It is true that the road infrastructure development of urban transport material carriers meet the traffic demand, but by the funding of road construction and urban land space constraints, therefore, we are to ensure that each year some funds for road construction, the more important is to take less investment and quick method, the second way to solve the urban traffic problem is the use of advanced science and technology, modern management and control of urban traffic, improve the capacity of existing roads, this method is a connotation enhance traffic management and control is widely recognized benefits significantly less investment.As can be seen from the road traveled by Britain, the United States, Australia and other countries and traditional predictive control method does not seem to the direction of future research, intelligent control may be an effective way to solve the urban traffic control problem, should be in the future focus on the object. Typical urban traffic signal control systemWith the development of puter and automatic control technology, and the constant improvement of traffic flow theory, transportation organizations and optimization theory continuously improve the technical level, the function of traffic control is enhanced more and more advanced means of control, the formation of a number of highlevel the effective urban road traffic control system.Representative countries in the world most widely used and effective traffic control system the TRANSYT systems, SCATS and SCOOT system. Domestic urban traffic signal control system statusThe late start in China in the development and application of traffic signal control system, started in 1973 the development of single point signal control of urban traffic bywire system in “Beijing three Main Street in 1985.As the Plan major national research items mouth, Nanjing assistance of Tongji University has developed a set of the domestic intelligent traffic signal control system, due to various reasons, a number of important functions, such as realtime adaptive timing did not use. Tianjin University (19891991) research and development of urban traffic control system, TICS (Traffic Intelligent Control system) successfully for the first time since learning intelligent principle applied to the traffic signal control system. Jilin University in 2000 2002, under the auspices of Professor Yang Zhaosheng research and development of urban mixed traffic characteristics of adaptive signal control system and its software mixed traffic adaptive signal control system, the system included bicycle traffic flow detection, consider bicycle traffic during signal timing optimization program with practical engineering applications , a