Communication Design for Automated Highway Systems Based on Different Control Requirements
Date Issued
2005
Date
2005
Author(s)
Tai, Chao-Hung
DOI
en-US
Abstract
In the beginning of this thesis, an automated highway system (AHS) is discussed. Following the organization of Intelligent Transportation System America, an AHS is one of seven sub-systems of intelligent transportation systems. The control architecture of AHS is also discussed. The control architecture of AHS contains five sub-layers, i.e., network layer, link layer, coordination layer, regulation layer, and vehicle dynamic layer. In this thesis, the major discussion focuses on the coordination and regulation layers.
Secondly, the control tasks in the coordination layer are maneuvers. All the maneuvers can be decomposed into three elementary maneuvers, i.e., merge, split, and lane change. The control tasks in the regulation layer are to execute a controller which may combine longitudinal controls and/or lateral controls, and the task is to achieve the maneuver decided in the coordination layer. This is because different controllers decided in the regulation layer need different information (or different communication requirements). In order to discuss the problem about different controllers needing different communication requirements, tables of organized papers about the different vehicle controllers including longitudinal controllers and lateral controllers are presented. According to the tables, new communication architecture is established to satisfy the three elementary maneuvers. This new architecture describes the maneuver based on different controllers needing different communication requirements. Furthermore, a communication flow chart based on the new communication architecture and execution maneuver is shown. According to the communication flow chart, the processes of executing a maneuver can be observed.
Finally, one type of the joining maneuver is taken as an example to discuss. According to the new communication architecture, the communication flow chart can be also established by the process of the joining maneuver. In the end, in order to observe the situations of executing joining maneuver and confirm whether any maneuver can follow the new communication architecture, a simulator is programmed in this thesis.
Subjects
自動公路系統
控制架構
縱向控制
橫向控制
通訊
行車策略
流程圖
automated highway systems
control architecture
longitudinal control
lateral control
communication
maneuver
flow chart
Type
thesis
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