Redundant Structure Design Of Computer Interlocking System

Computer interlocking is a computer technology as the core,with communication technology,reliability and fault tolerant technology and " fault--Safety" technology to realize railway station real-time control system.It is also the key to realize reliable and safe control of driving safety.With the development of electronic information and network technology,the computer interlocking system develops to the high redundant structure and the integration direction.According to the actual situation of rail transit By analyzing the computer interlocking system and its redundant structure,the computer interlocking system of double 2-vote-2 redundant structure is designed and tested in the section of rail transit.After testing,the system can be used up to 99.999998%.The main research is as follows:(1)analyzing the system structure about affecting the system safety and reliability,discussing the effective technical means to enhance the reliability of the system,studying the technology to improve system reliability and safety with applying of hardware redundancy and software redundancy technique.(2)using the markov model to establish the system state transition diagram about different redundant computer interlocking system.By studying the loss efficiency and failure detection coverage of several redundant structures,it is proved that the double 2-vote-2 computer interlocking system has higher security.(3)designing the computer interlocking system of double 2-vote-2 redundant structure,and give a design model from hardware structure,network redundancy structure and software structure.(4)testing the system of double 2-vote-2 redundant structure computer interlocking system By usingThe simulation software and simulation test interface of rail transit.