Papers by Author: Yu Long Pei

Abstract: As a kind of flexible and under actuated systems which based on cooperative vehicle infrastructure system (CVIS), autonomous tractor-semi trailer platoon in vehicle networking can enhance the information interaction and controllability of safety. Establish the two degree of freedom model of tractor-semi trailer firstly. Then, we analysis dominant factor and equilibrium point for the under actuated physics system's stability including its coordination evolution rule. Space-time mathematical model was established based on the dynamic observation information during vehicle platoon driving. μ-Synthesis robust controller was designed to deal with real time conditions, for example, following, lane changing and obstacles avoiding. The parameters of autonomous under actuated platoon controller can be adjusted on-line by fuzzy rules. Finally, we verify robust stability and dynamic performance of autonomous under actuated platoon tracking controller by the computation simulation method.

Abstract: To design vehicle auxiliary equipment, it need master the characteristic of eye. The paper adopted iView X HED as equipment to get the characteristic of eye during traffic operation, results could be treat as experiment research. The paper collected the data of eye, and adopted location, during, blink time, blink frequency, transient of eye focus as parameters to study the characteristic of eye, and given a measurable value to them. It was a foundation to further research of driver’s characteristic. The result shown that: the location mainly in ahead, the average value of time and blink was 0.3098s and 0.231s. Frequency of blink was respond to traffic condition, the mainly direction of transient was left and right.

Abstract: The pavement distress has considerable influence with drivers. Considering the fact that the forms of asphalt pavement potholes, subsidence and cement pavement potholes (collectively defined as pavement pothole-subsidence) are similar and they can influence traffic flow significantly, we put forward to use indexes such as Tangential Diameter Length, Normal Diameter Length, Depth, Lateral distance, etc to describe the characteristics of pothole-subsidence. According to different wheel paths & speed, driving modes was classified into several types, influences of various pothole-subsidence on driving mode and speed was analyzed.

Abstract: Although traffic development brings convenience to citizen, problems such as parking, traffic transferring, caused by passenger transport hub have aroused extensive attention from society. Based on teasing parking demand hierarchy and willingness choice, concept of expected utility is introduced to uncover logical relationship among transport hub, influence factors, and parking demand. Data about parking facilities and their characteristics, parker desire, characterization parameters related with hub, are surveyed and collected to analyze and confirm the key influence factors on the basis of urban comprehensive passenger transport hub oriented high-speed rail, for setting up the relation model between parking demand at synthesis passenger hub and its impact factors, which is used to propose the forecasting method of parking demand at the comprehensive passenger transport hub oriented high-speed rail.

Abstract: Considering the fact that the forms of asphalt pavement potholes, subsidence and cement pavement potholes (collectively defined as pavement pothole-subsidence) are similar and they can influence traffic flow significantly, we put forward to use indexes such as Tangential Diameter Length, Normal Diameter Length, Depth, Lateral distance, etc to describe the characteristics of pothole-subsidence, and we also adopt AutoScope-2004 video detection system aided by artificial judging to investigate in the surveyed road section. According to different wheel paths, driving modes was classified into three types, influences of various pothole-subsidence on driving mode and speed was analyzed. We came up with conclusions as follows: one is that pothole-subsidence significantly influenced the variation of vehicle trajectory, 78.5% vehicles altered their driving direction, and the average rate of speed descent is over 20%.