| The main method about the dynamic redundancy structure's analysis of reliability and safety In domestic and abroad is the Markov model. However, regarding relatively complex redundant system which is called double 2-vote-2 computer-based interlocking system, compared to quantum hot standby system, its state space's scale has a very big growth when using Markov model for the analysis. Then it will cause modeling process and solution procedure being very tedious. This article is for the purpose of using the dynamic fault tree method to carry on the solution of double 2-vote-2 computer-based interlocking system and comparing to the dual module hot spare system and the triple modular redundancy system's related performance by using curves of reliability and security, then get the result that the performance of double 2-vote-2 computer-based interlocking system is better, and the remote control system which is an promoted form of double 2-vote-2 computer-based interlocking system also has a good performance. As a result, double 2-vote-2 computer-based interlocking system needs more intensively analysis, and it is suitable for more promotion and application in various railway stations.In the thesis, research is focused on the followings:Reliability and safety of double 2-vote-2 computer-based interlocking system are analyzed. Through the cost-benefit analysis of the Markov model which is used in this field originally, Shortcomings that should not be neglected have been found out. Then, the dynamic fault tree method has been provided as an effective method on this issue. The model of remote control system based on the methods of dynamic fault tree has been built effectively. Then by compare-eing to many methods,an useful solving way has been found out. By using Matlab technique of simulation, base information about three technical computer-based interlo-cking systems have been reflected intuitively and visually, then, it can explain many new characteristics of double 2-vote-2 computer-based interlocking system. This adve-ntage is also reflected on the simulation of remote control system. |
