汽車跟馳行為仿真實(shí)驗(yàn)研究
[Abstract]:With the rapid development of intelligent transportation, the research on microscopic traffic flow theory is more and more intensive, and the car-following model is developed with the development of micro-traffic flow theory. As the basis of microscopic traffic flow theory, car-following model plays an important role in perfecting and supplementing traffic flow theory. It is of great significance for the analysis and research of traffic safety, traffic management, road capacity evaluation and so on. Therefore, the study of car-following model has very important theoretical significance and application value. However, most of the current research on car-following model is based on mathematical analysis and computer simulation, which lacks an intuitive and real display interface. Based on the StarterKit2.0 hardware platform of NI Company, a set of simulation experiment system of vehicle car-following behavior with demonstration function is developed in this paper. First of all, on the basis of reading the relevant literature, the thesis makes a detailed summary of the research topics. In view of the simple structure of the optimal speed and car-following model, the mathematical expansion and the most extensive application, the paper takes the model as the key research object. The results are compared with the whole velocity difference model. Then, based on the performance of Starter Kit 2.0, the optimal velocity model and the full velocity difference model are calibrated, and the linear stability theory is used to analyze the stability of the calibrated car-following model. The accurate conditions for the stability of the model are calculated by using the control theory and mathematical analysis method. The stability of the calibrated car-following model is theoretically verified by using C and MATLAB programming techniques. Secondly, three groups of car-following experiments are designed to verify the stability of the model. The main work is as follows: the second development of NI Single-Board RIO embedded control board, the extension of RS232 serial port to WiFi module based on board hardware interface, the completion of hardware debugging and software design of communication module, and the realization of communication function between Starter Kit 2.0 and computer. The function of communication between the front car and the rear car is discussed, the infrared detection sensor module is extended, the track runway and the lower computer motion control program are designed, and the tracking function of Starter Kit 2.0 is realized. Finally, the upper computer interface is designed by using LabVIEW language, which can collect, process, store and display the moving state of StarterKit2.0 in real time, including the information of the distance between the front and the rear, the speed of the front and back, the acceleration of the rear car and so on. The innovation of this paper lies in the combination of track tracing and car-following behavior, which accurately demonstrates the car-following behavior of two-car system on a single track. In the process of experiment, the wireless communication is realized by using WiFi technology. The front and rear vehicles can obtain the movement state information of each other in real time according to the need of function, and realize the information exchange, which reflects the idea of vehicle networking to conform to the trend of traffic development in the future. A human-machine interface is developed to display the information of vehicle motion state, which is convenient for observation, analysis and processing of data, and provides a reference for researchers to study the behavior of car-following in the future.
【學(xué)位授予單位】:山東大學(xué)
【學(xué)位級別】:碩士
【學(xué)位授予年份】:2017
【分類號】:U491
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