單交叉口交通信號智能控制策略及仿真研究
[Abstract]:Since entering the 21st century , China ' s economy has developed rapidly , the living standard of the people has been greatly improved , the quantity of the automobile is increasing year by year , the traffic congestion and environmental pollution have become more and more serious .
In recent years , the traffic volume of road network in Harbin has been increasing rapidly . Most of the roads in the urban area have shown congestion . In recent years , the traffic jam is more serious .
First , in the non - peak period fuzzy control scheme , combined with the application example of fuzzy control in traffic light control , a four - phase four - phase fuzzy controller is established to reduce the average delay . It includes controller structure design , fuzzy algorithm design , membership function design and control rule establishment , and MATLAB . Finally , MATLAB is used to simulate the scheme and compare it with timing control . It is found that the maximum delay of unit vehicle delay can reach more than 30 % , and the feasibility of this scheme is verified .
Secondly , in the timing control of peak period , based on the measured traffic flow data during peak period , the optimal design of signal distribution is carried out by Webster method , and the simulation road network is built with VISSIM software . The results show that the queuing length is reduced by 12 % , the delay time is reduced by 10.6 % , and the optimized control scheme can better improve traffic jam condition .
Finally , the hardware design and software design of the control system with STC12C5A60S2 single chip microcomputer as the main control device are introduced , and the hardware circuit and the software program flow of each part are described briefly . The hardware part mainly introduces some hardware design ideas and working principles such as the minimum system of the single chip microcomputer , the vehicle flow detection circuit , the clock circuit and the digital tube display circuit .
The software part mainly introduces the main program , the fuzzy control subroutine , the timing control subroutine , the green conflict detection subroutine and the key interrupt handler design flow in the control system . By testing the working process of the control system , it is proved that the control system can meet the control requirements and the control scheme is feasible and effective .
【學(xué)位授予單位】:東北農(nóng)業(yè)大學(xué)
【學(xué)位級別】:碩士
【學(xué)位授予年份】:2014
【分類號】:U491.54
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