Research On Key Technologies Of Safety Computer Based On Private Cloud

With the rapid development of the rail transit industry and the increasing number of people traveling outside,the capacity of the rail transit system is greatly challenged,the higher requirements for the performance of the rail transit train control system are put forward.The contradiction between the computing power and the number of equipment,space and other factors in the existing rail transit train control system is becoming increasingly prominent,and the demand for the development of the next generation rail transit train control system is becoming increasingly urgent.As the core of the rail transit train control system,the performance of the train control system is affected directly by the performance of the safety computer platform,thereby the safety and efficiency of the train operation are also affected directly.Therefore,the research and design of the safety computer platform in the next-generation rail transit train control system are critical to the development of the entire system.In view of the contradiction between the computing power and the number of equipment and space in the traditional rail transit train control system,the cloud computing technology is introduced into the rail transit train control system,and the scheme design and related technologies of the cloud-based safety computer platform are studied.Firstly,the contradictions existing in the current rail transit train control system and the technical characteristics and advantages of cloud computing technology are analyzed,the problem of introducing cloud computing technology into rail transit train control system is studied,and the research topics of the safety computer platform based on private cloud is proposed,then the relevant application scenarios and its technical advantages are pointed out.Secondly,the selection on the safety redundant structure of the safety computer platform based on the private cloud is analyzed.According to the IEC 61508 standard,the impact of the parameter uncertainty,cloud computing virtualization technology and cloud computing server performance for the safety redundant structure parameters are considered.Corresponding assumptions about the impact of cloud computing virtualization technology and cloud computing server performance on for the safety redundant structure parameters are made,and the Monte Carlo method is used to calculate,compare and analyze the safety and reliability of the two out of two,two out of three and double two out of two redundant structures.Then corresponding recommendations for the selection of cloud computing virtualization technology,cloud computing server performance and safety redundancy structure based on the private cloud-based safety computer platform are provided.Finally,according to the recommended safety redundancy structure,the corresponding implementation solution of the private cloud-based safety computer platform is designed,which includes design of cloud computing equipment,design of communication system and design of ground equipment,and each part is modularly designed.At the same time,according to the safety requirements of the safety computer platform,the risk cause analysis of the private cloud-based safety computer platform is carried out,and the safety integrity guarantee mechanism is designed to ensure its safety integrity.Besides,according to the design solution,the private cloud-based safety computer platform is implemented to verify the feasibility of the solution.In summary,based on cloud computing technology and safety computer-related technologies,the laboratory prototype of private cloud-based safety computer platform is designed and implemented to prove the rationality of the design and provide solid foundation for subsequent related research.