Research And Design On A New Type Of Distributed Computer Interlocking System

Computer interlocking system is applied to railway signal control domain.It is the station signal control system for protecting the traffic safety and improves the transport efficiency.At present,our country's computer interlocking system is still mainly focused on centralized contral,and its key is interlocking computer.Interlocking computer and its interface's relibility and security as the focal point of the system affects the whole chain.With the continuous development of railway signal technology, intelligent and network for railway traffic control will be the development trend in future. In-depth study of computer interlocking technical conditions,and application of the distributed control system and multi-Agent technology,it designs a new type of distributed and intelligent computer interlocking system is designed.The thesis analyzes the feasibility of the distributed control and Multi-agent system which used in computer interlocking system,designs the basic structure of the system and detail structure of Agent unit.Differing with the existing compute interlocking system,this system realizes the interlocking computing function and the control of field device's driving and acquisition by signals,switches,section intelligent unit,and replaces the intelocking computer and relay cases in the existing interlocking system.The thesis researches the structure of distributed control system,and designs the whole structure of a new type distributed computer interlocking system. Which contains the design of each part and the design of CAN network system. So it realizes many important functions,such as distributed control,centralized management,structural redundancy,distributed intelligence, distributed communication and distributed load.The key section of the system can avoid some faults to affect the whole system and thus can improve the reliability of the whole system.The key section of the system is Agent unit.It also is the base of the system's intelligence.lt combines with multi-Agent system technology,designs the implementation method of Agent unit. This paper introduces the design principles about the Agent unit architecture, hardware, software,communication and the working process, and the software design aslo includes the design of control software and interlocking software.As the node of the system, Agent unit adopts double 2-vote-2 inside,and directly connects with the field devices.There are two sets of Agent unit connect with each device,one is working and the other is hot standby to ensure the reliability of the system.At last,this paper gives some safeguards of security and reliability for the system,meanw-hile analyzes the realiability and security of Agent unit which is the key module in the system. Which demonstrates the high reliability and security of the system accords with the design requirements of the station signal interlocking equipment.