Railway system RAMS analysis method and device based on MBSE

Abstract

The embodiment of the invention relates to the technical field of railway system RAMS analysis, and provides an MBSE-based railway system RAMS analysis method and device, and the method comprises the steps: determining an operation target-oriented RAMS demand according to an operation target which should be satisfied by the operation of a railway system; integrating a railway RAMS analysis method based on a pre-constructed railway system model and the RAMS demand facing the operation target, wherein the railway system model is constructed through an MBSE method; and determining a system fault propagation rule and behavior information according to the railway system model, and performing railway system RAMS analysis through a corresponding target RAMS analysis method in the integrated railway RAMS analysis method to obtain a railway system RAMS analysis result. Therefore, RAMS analysis and system function performance design are integrated and fused, the complexity of the railway system can be better dealt with, comprehensive management and analysis of the RAMS of the railway system can be objectively and scientifically carried out, and the RAMS analysis efficiency and accuracy can be improved.

Description

Technical Field

[0001] The present invention relates to the technical field of railway system RAMS analysis, and in particular to a railway system RAMS analysis method and device based on MBSE. Background Art

[0002] The reliability, availability, maintainability and safety (RAMS) of railway systems are key indicators to ensure their long-term safe and reliable operation. With the development of railway systems, their highly complex functional structure, strong coupling of various disciplines, and dynamic reconstruction of faults have become increasingly prominent. The application of traditional RAMS analysis technology at the railway system level has shown certain limitations, including: (1) The traditional railway RAMS method focuses on the analysis of a single subsystem or component, lacks an integrated analysis method across systems and fields, and cannot accurately characterize and decompose the RAMS requirements of railway systems; (2) The occurrence of faults in railway systems has the characteristics of correlation and timing, and the overall operating environment is also dynamically changing. Traditional RAMS analysis is mostly static analysis, which cannot objectively and accurately describe the fault propagation and laws of railway systems. (3) Railway systems have typical characteristics such as high construction difficulty, long construction period, and high engineering risk. Traditional analysis methods cannot carry out RAMS verification before the construction and operation of railway systems. Summary of the invention

[0003] The present invention provides a railway system RAMS analysis method and device based on MBSE, which are used to solve the defects in the prior art that the RAMS requirements of the railway system cannot be accurately characterized and decomposed and transmitted, the fault propagation and laws of the railway system cannot be described, and RAMS verification cannot be carried out before the construction and operation of the railway system. The method realizes the integrated fusion of RAMS analysis and system function performance design, can better cope with the complexity of the railway system, objectively and scientifically carry out comprehensive management and analysis of the RAMS of the railway system, and helps to improve the efficiency and accuracy of RAMS analysis.

[0004] The present invention provides a railway system RAMS analysis method based on MBSE, comprising: Determine the RAMS requirements for the operational objectives that the railway system should meet based on the operational objectives; Integrating a railway RAMS analysis method based on a pre-built railway system model and RAMS requirements oriented to the operational objectives, wherein the railway system model is built using an MBSE approach; Determining system fault propagation rules and behavior information based on the railway system model; According to the system fault propagation law and behavior information, the railway system RAMS analysis is performed through the corresponding target RAMS analysis method in the integrated railway RAMS analysis method to obtain the railway system RAMS analysis result.

[0005] In a possible implementation, the method further includes: Determine the mission requirements that the railway system operation should meet according to the railway system operation scenario, wherein the mission requirements include punctuality, transportation volume, and safety; Based on the mission requirement analysis, RAMS requirements oriented to the mission requirements are determined.

[0006] In a possible implementation, the method further includes: Analyze each component of the railway system to determine the system architecture, component elements and interface relationships of each component of the railway system; According to the architecture, constituent elements and interface relationships of each component of the railway system, the physical structure model of the railway system and the functional behavior model of the railway system are constructed by the MBSE method.

[0007] In a possible implementation, the method further includes: Analyze the impact of railway system failures and the transmission relationship between failures based on the railway system physical structure model and railway system functional behavior model; A railway RAMS analysis method is integrated based on the impact of the railway system failures, the transmission relationship between the failures and the RAMS requirements oriented to the operation objectives.

[0008] In a possible implementation, the method further includes: The RAMS historical data of the railway system is obtained and the system fault propagation law and behavior information are determined based on the analysis of the RAMS historical data.

[0009] In a possible implementation, the method further includes: Determine basic data required for RAMS analysis using the target RAMS analysis method based on the RAMS historical data and expert knowledge; According to the system fault propagation law, behavior information and basic data, the railway system RAMS analysis is performed by using the target RAMS analysis method to obtain the railway system RAMS analysis result.

[0010] In a possible implementation, the method further includes: Performing system simulation verification on the railway system RAMS analysis results; Based on the railway system model and the railway system RAMS analysis results, train group operation simulation verification is carried out to evaluate the impact of different failure modes on the system RAMS.

[0011] The present invention also provides a railway system RAMS analysis device based on MBSE, comprising the following modules: A determination module, for determining RAMS requirements for operation objectives that should be met by the railway system operation; an integration module for integrating a railway RAMS analysis method based on a pre-built railway system model and RAMS requirements oriented to the operation objectives, wherein the railway system model is built by an MBSE approach; The determination module is further used to determine the system fault propagation law and behavior information according to the railway system model; The analysis module is used to perform railway system RAMS analysis through the corresponding target RAMS analysis method in the integrated railway RAMS analysis method according to the system fault propagation law and behavior information, and obtain the railway system RAMS analysis result.

[0012] The present invention also provides an electronic device, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein when the processor executes the computer program, the MBSE-based railway system RAMS analysis method as described above is implemented.

[0013] The present invention also provides a non-transitory computer-readable storage medium having a computer program stored thereon, and when the computer program is executed by a processor, the MBSE-based railway system RAMS analysis method as described in any one of the above is implemented.

[0014] The present invention also provides a computer program product, comprising a computer program, wherein when the computer program is executed by a processor, the MBSE-based railway system RAMS analysis method as described above is implemented.

[0015] The MBSE-based railway system RAMS analysis method and device provided by the present invention determine the RAMS requirements for the operation objectives that the railway system operation should meet; integrate the railway RAMS analysis method based on a pre-constructed railway system model and the RAMS requirements for the operation objectives, wherein the railway system model is constructed by the MBSE method; determine the system fault propagation law and behavior information according to the railway system model; perform railway system RAMS analysis by using a corresponding target RAMS analysis method in the integrated railway RAMS analysis method according to the system fault propagation law and behavior information, and obtain a railway system RAMS analysis result. Compared with the defects of the existing technology that cannot accurately characterize and decompose the RAMS requirements of the railway system, describe the fault propagation and laws of the railway system, and cannot carry out RAMS verification before the construction and operation of the railway system, this solution provides a comprehensive demand analysis and management method for the railway system by establishing a multi-level and multi-view model. Through modeling, the relationship between requirements and system architecture and design is clarified, thereby supporting dynamic management and change control of requirements; through the combination of MBSE-based railway system modeling and RAMS analysis methods, the integrated fusion of RAMS analysis and system functional performance design can be achieved, which can better cope with the complexity of the railway system, objectively and scientifically carry out comprehensive management and analysis of the RAMS of the railway system, and help improve the efficiency and accuracy of RAMS analysis, and provide a solid basic theoretical support for improving the accuracy of MBSE models and optimizing RAMS analysis processes in the railway system, which is of great significance to the realization of all-round high-quality development of my country's railways. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 It is one of the flow charts of the MBSE-based railway system RAMS analysis method provided by the present invention.

[0018] Figure 2 This is the second flow chart of the MBSE-based railway system RAMS analysis method provided by the present invention.

[0019] Figure 3 It is a schematic diagram of the physical structure of the railway system provided by the present invention.

[0020] Figure 4It is a schematic diagram of the railway system environment detection and monitoring function model provided by the present invention.

[0021] Figure 5 It is a schematic diagram of a fault tree model of a railway system bogie provided by the present invention.

[0022] Figure 6 It is a schematic diagram of railway operation simulation provided by the present invention.

[0023] Figure 7 It is a structural schematic diagram of the MBSE-based railway system RAMS analysis device provided by the present invention.

[0024] Figure 8 It is a structural schematic diagram of the electronic device provided by the present invention. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the drawings of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0026] To facilitate understanding of the embodiments of the present invention, specific embodiments will be further explained below in conjunction with the accompanying drawings. The embodiments do not constitute a limitation on the embodiments of the present invention.

[0027] Figure 1 This is one of the flow charts of the MBSE-based railway system RAMS analysis method provided by the present invention, such as Figure 1 As shown, the method includes the following: S11. Determine RAMS requirements for the operational objectives based on the operational objectives that the railway system should meet.

[0028] In the embodiment of the present invention, firstly, the requirements of system reliability, availability, maintainability and safety (Reliability, Availability, Maintainability, Safety, RAMS) are analyzed and clarified for the operational tasks mainly focusing on railway transportation. Secondly, based on the MBSE method, standardized and normalized system modeling is carried out for the physical structure and functional behavior of the railway system from the overall railway system to the subsystems and components, and a complete physical and functional behavior model transmission path from the system to the subsystem and then to the components can be established. On this basis, the impact of the fault and the transmission relationship between the faults are analyzed, and the fault propagation law and behavior of the railway system are analyzed in combination with the existing RAMS analysis method, and the railway system RAMS analysis is carried out comprehensively. Finally, a railway system model is created according to the model-based systems engineering modeling method (Model-Based Systems Engineering, MBSE), the operation of the train group under different conditions is simulated, and the railway system RAMS simulation verification is carried out.

[0029] Specifically, first determine the mission requirements that the railway system operation should meet based on the railway system operation scenario. The mission requirements include at least punctuality, transportation volume, and safety; determine the RAMS requirements oriented to the mission requirements based on the mission requirement analysis.

[0030] S12. Integrate the railway RAMS analysis method based on the pre-built railway system model and the RAMS requirements oriented to the said operation objectives.

[0031] The railway system model includes the railway system physical structure model and the railway system functional behavior model. The various components of the railway system are analyzed to determine the system architecture, components and interface relationships of the various components of the railway system; then, the railway system physical structure model and the railway system functional behavior model are constructed through the MBSE method based on the system architecture, components and interface relationships of the various components of the railway system.

[0032] Furthermore, according to the physical structure model and functional behavior model of the railway system, the impact of railway system failures and the transmission relationship between failures are analyzed; based on the impact of railway system failures and the transmission relationship between failures, the corresponding target RAMS analysis method is determined in the integrated railway RAMS analysis method.

[0033] S13. Determine system fault propagation rules and behavior information according to the railway system model.

[0034] S14. According to the system fault propagation law and behavior information, a railway system RAMS analysis is performed by a corresponding target RAMS analysis method in the integrated railway RAMS analysis method to obtain a railway system RAMS analysis result.

[0035] The RAMS historical data of the railway system is obtained and the system fault propagation law and behavior information are determined based on the RAMS historical data analysis; the basic data required for RAMS analysis through the target RAMS analysis method is determined based on the RAMS historical data and expert knowledge; according to the system fault propagation law, behavior information and the basic data, the railway system RAMS analysis is performed through the target RAMS analysis method to obtain the railway system RAMS analysis results.

[0036] Furthermore, the railway system RAMS analysis results are systematically verified by simulation, including conducting train group operation simulation verification based on the railway system model and the railway system RAMS analysis results, and evaluating the impact of different failure modes on the system RAMS.

[0037] The MBSE-based railway system RAMS analysis method provided by the present invention determines RAMS requirements for the operation objectives that should be met by the railway system operation; integrates the railway RAMS analysis method based on a pre-constructed railway system model and the RAMS requirements for the operation objectives, wherein the railway system model is constructed by the MBSE method; determines system fault propagation laws and behavior information based on the railway system model; performs railway system RAMS analysis through a corresponding target RAMS analysis method in the integrated railway RAMS analysis method based on the system fault propagation laws and behavior information, and obtains railway system RAMS analysis results. Compared with the defects of the existing technology that cannot accurately characterize and decompose the RAMS requirements of the railway system, describe the fault propagation and laws of the railway system, and cannot carry out RAMS verification before the construction and operation of the railway system, this solution provides a comprehensive demand analysis and management method for the railway system by establishing a multi-level and multi-view model. Through modeling, the relationship between requirements and system architecture and design is clarified, thereby supporting dynamic management and change control of requirements; through the combination of MBSE-based railway system modeling and RAMS analysis methods, the integrated fusion of RAMS analysis and system functional performance design can be achieved, which can better cope with the complexity of the railway system, objectively and scientifically carry out comprehensive management and analysis of the RAMS of the railway system, and help improve the efficiency and accuracy of RAMS analysis, and provide a solid basic theoretical support for improving the accuracy of MBSE models and optimizing RAMS analysis processes in the railway system, which is of great significance to the realization of all-round high-quality development of my country's railways.

[0038] Figure 2 This is the second flow chart of the MBSE-based railway system RAMS analysis method provided by the present invention, such as Figure 2 As shown, the method includes the following: S21. Determine the task requirements that the railway system operation should meet based on the railway system operation scenario.

[0039] In the embodiment of the present invention, firstly, the requirements of system reliability, availability, maintainability and safety (Reliability, Availability, Maintainability, Safety, RAMS) are analyzed and clarified for the operational tasks mainly focusing on railway transportation. Secondly, based on the MBSE method, standardized and normalized system modeling is carried out for the physical structure and functional behavior of the railway system from the overall railway system to the subsystems and components, and a complete physical and functional behavior model transmission path from the system to the subsystem and then to the components can be established. On this basis, the impact of the fault and the transmission relationship between the faults are analyzed, and the fault propagation law and behavior of the railway system are analyzed in combination with the existing RAMS analysis method, and the railway system RAMS analysis is comprehensively carried out. Finally, a railway system model is created based on MBSE, the operation of the train group under different conditions is simulated, and the railway system RAMS simulation verification is carried out.

[0040] Specifically, the mission requirements that the railway system operation should meet are determined based on the railway system operation scenarios. The operation scenarios include transporting passengers or transporting goods. When transporting passengers, the mission requirements include punctuality and safety; when transporting goods, the mission requirements include punctuality, transportation volume and safety, etc.

[0041] S22. Determine RAMS requirements for the task requirements based on the task requirement analysis.

[0042] RAMS requirements include reliability, availability, maintainability and safety. Analyzing the above mission requirements to determine the RAMS requirements of the mission requirements means that it is necessary to ensure that the reliability, availability, maintainability and safety of the system meet the established standards and goals from the perspective of mission requirements. When determining RAMS requirements, the following aspects need to be considered: Mission requirements analysis: First, the mission requirements of the railway system must be clearly defined, including key indicators such as transportation volume, punctuality, and safety. For example, transportation volume may involve the maximum carrying capacity of the system, while punctuality involves the on-time performance of the system.

[0043] RAMS indicator determination: Determine the corresponding RAMS indicators based on the task requirements. For example, for punctuality, you may need to set a target value, such as the punctuality rate of regional rail transit reaching 99%.

[0044] Risk assessment and management: Identify and assess potential risks of the system through methods such as FMEA (Failure Mode and Effects Analysis), and develop corresponding mitigation measures.

[0045] Design and Improvement: Based on RAMS indicators and risk assessment results, optimize and improve the system design to meet RAMS requirements. For example, if the reliability indicator does not meet the target, it may be necessary to improve the reliability of the system by designing a derating level.

[0046] Through the above steps, it can be ensured that the RAMS requirements of the railway system are met, thereby improving the operating efficiency and safety of the system.

[0047] S23. Analyze each component of the railway system to determine the system architecture, constituent elements and interface relationships of each component of the railway system.

[0048] Railway is a complex system with many subsystems and components working together and interacting closely. Therefore, the overall RAMS requirements of the railway system are not only determined by a single subsystem, but also affected by the collaboration between subsystems. In order to accurately analyze the RAMS requirements of the railway system, the railway system is divided into mobile equipment, traction power supply, communication signal and public works engineering subsystems, such as Figure 3 As shown, the RAMS requirements of the railway system can be accurately broken down into the specific functions of subsystems and components.

[0049] S24. Constructing a railway system physical structure model and a railway system functional behavior model through the MBSE method according to the architecture, constituent elements and interface relationships of each component of the railway system.

[0050] Based on the above analysis results of the various components of the railway system, combined with the standardized modeling methods, processes and tools of MBSE, the physical structure and functional behavior of the railway system are established. By dividing the lanes, the role of the railway system in the functional model can be clearly defined, and by defining the "activity" structure, the behavior mode of each subsystem in a specific scenario can be described in detail. At the same time, by constructing the behavior flow, the order of behavior occurrence and the relationship between behaviors can be accurately determined, such as Figure 4 The schematic diagram of the railway system environmental detection and monitoring function model is shown, which improves the clarity and comprehensibility of the model and helps to deeply analyze the performance of the system in different environments.

[0051] S25. Analyze the impact of railway system failures and the transmission relationship between failures based on the railway system physical structure model and the railway system functional behavior model.

[0052] S26. Integrate the railway RAMS analysis method based on the impact of the railway system failure, the transmission relationship between the failures and the RAMS requirements oriented to the operation objectives.

[0053] The railway system is composed of multiple subsystems and components. When a component or subsystem fails, it may affect the performance of the entire system and even cause system failure. Therefore, in the RAMS analysis of the railway system, the selection of analysis methods and the construction of fault propagation models are crucial. The railway system functional model is constructed through MBSE, and the RAMS analysis method is integrated. For example, when considering the impact of a single fault, you can choose to output the functional failure mode and effect analysis (FMEA) list. When you need to consider the combined impact of multiple faults, you can choose to export the fault tree, Bayesian network, etc. In addition, if you need to analyze the timing combination of faults, you can choose to use dynamic Bayesian networks, Monte Carlo and other methods.

[0054] S27, obtaining RAMS historical data of the railway system and determining system fault propagation rules and behavior information based on analysis of the RAMS historical data.

[0055] Obtain the RAMS historical data of the railway system, and through statistical analysis of the historical data, clarify the fault propagation law and behavioral characteristics of the railway system, including the frequency of faults, fault types, fault causes, and the impact of faults on system performance, etc. By analyzing these data, identify the key failure modes and potential risk factors of the system, thereby providing basic data support for subsequent RAMS analysis.

[0056] S28. Determine the basic data required for RAMS analysis using the target RAMS analysis method based on the RAMS historical data and expert knowledge.

[0057] Furthermore, by combining historical data and expert knowledge, the basic data required for RAMS analysis can be clarified, including equipment operating parameters, maintenance records, fault reports, and accident investigation results. Based on the railway system model and RAMS analysis method, quantitative analysis and calculation of railway system RAMS are carried out to evaluate the impact of different failure modes on system RAMS.

[0058] S29. According to the system fault propagation law, behavior information and basic data, a railway system RAMS analysis is performed using the target RAMS analysis method to obtain a railway system RAMS analysis result.

[0059] S210, performing system simulation verification on the railway system RAMS analysis result.

[0060] For example, based on the historical fault data of the bogie and the fault model of the railway system bogie, the fault tree analysis method is used to construct a fault tree model of the railway system bogie. Figure 5As shown, the corresponding reliability failure probability is quantitatively calculated. The fault tree logic AND gate represents the parallel connection of input events, that is, when all input events x1, x2, ⋯, xn occur, the output event occurs, and its structure function is: The fault tree logic OR gate represents the input event series connection, that is, as long as one of the input events x1, x2, ⋯, xn occurs, the output event will occur. Its structure function is: By counting the probability of occurrence of each bottom event, the probability of bogie failure is calculated to be 0.0990424. On this basis, a detailed model of the railway system is created based on the MBSE method, including tracks, stations, signal systems, trains and other related infrastructure, accurately reflecting the functions and behaviors of the actual system, such as Figure 6 As shown, on this basis, the operation of train groups under different conditions will be simulated, and based on the simulation results, a comparative analysis will be conducted with theoretical analysis and actual operation data to carry out a simulation evaluation of the RAMS of the railway system.

[0061] S211. Based on the railway system model and the railway system RAMS analysis results, train group operation simulation verification is carried out to evaluate the impact of different failure modes on the system RAMS.

[0062] Based on the railway system model and combined with the RAMS analysis structure, train group operation simulation is carried out to conduct system RAMS analysis simulation verification.

[0063] Specifically, the performance of train groups in long-term operation is simulated to evaluate the stability and failure rate of the system, and the reliability level of the railway system is evaluated by statistical analysis of failure data; the operation time and maintenance time of the railway system are simulated to evaluate the system's ability to operate normally within a given time, and the availability level of the railway system is evaluated by analyzing the unavailable time and maintenance cycle; the maintenance activities of the railway system are simulated to evaluate the difficulty and effectiveness of maintenance operations, and the maintainability level of the railway system is evaluated by simulating different maintenance strategies; the potential safety risks and accident scenarios in the railway operation process are simulated to evaluate the behavior and safety of the system in dangerous situations, the accident rate and consequences are analyzed, and the safety level of the railway system is evaluated.

[0064] It should be noted that the embodiments described above are only illustrative, in which the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or may be distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of this embodiment. Ordinary technicians in this field can understand and implement it without paying creative labor.

[0065] The MBSE-based railway system RAMS analysis method provided by the present invention provides a comprehensive demand analysis and management method for the railway system by establishing a multi-level, multi-view model. Through modeled representation, the relationship between demand and system architecture and design is clarified, thereby supporting dynamic management and change control of demand. Through the combination of MBSE-based railway system modeling and RAMS analysis method, the integrated fusion of RAMS analysis and system functional performance design can be achieved, which can better cope with the complexity of the railway system, objectively and scientifically carry out comprehensive management and analysis of the railway system RAMS, and help improve the efficiency and accuracy of RAMS analysis, and provide a solid basic theoretical support for improving the accuracy of MBSE models in railway systems, optimizing RAMS analysis processes, etc., which is of great significance to the realization of all-round high-quality development of my country's railways.

[0066] On the one hand, this method comprehensively covers the physical structure and functional behavior analysis modeling of the railway system, and systematically sorts out the railway system, subsystems and their components; on the other hand, through MBSE modeling and RAMS analysis, it can scientifically and accurately quantitatively calculate and analyze the RAMS level of the railway system, so that the analysis results are closer to the actual operation situation. The MBSE-based railway system RAMS analysis method is a necessity for modern railway system RAMS analysis, and it is also an inevitable requirement for integrating railway system RAMS analysis into the MBSE forward R&D and design engineering of the new generation of system equipment, so as to ensure the safe and reliable operation of the railway system and improve the RAMS level of the railway system.

[0067] The following is a description of the MBSE-based railway system RAMS analysis device provided by the present invention. The MBSE-based railway system RAMS analysis device described below and the MBSE-based railway system RAMS analysis method described above can refer to each other.

[0068] Figure 7 : is a schematic diagram of the structure of the MBSE-based railway system RAMS analysis device provided by the present invention, which specifically includes: The determination module 701 is used to determine the RAMS requirements for the operation objectives that should be met by the railway system operation. For detailed description, please refer to the relevant description corresponding to the above method embodiment, which will not be repeated here.

[0069] The integration module 702 is used to integrate the railway RAMS analysis method based on the pre-built railway system model and the RAMS requirements for the operation target, wherein the railway system model is built by the MBSE method. For detailed description, please refer to the relevant description corresponding to the above method embodiment, which will not be repeated here.

[0070] The determination module 701 is further used to determine the system fault propagation law and behavior information according to the railway system model. For detailed description, please refer to the relevant description corresponding to the above method embodiment, which will not be repeated here.

[0071] The analysis module 703 is used to perform railway system RAMS analysis by a corresponding target RAMS analysis method in the integrated railway RAMS analysis method according to the system fault propagation law and behavior information, and obtain the railway system RAMS analysis result. For detailed description, please refer to the relevant description corresponding to the above method embodiment, which will not be repeated here.

[0072] Figure 8 An example of a physical structure diagram of an electronic device is shown in FIG. Figure 8 As shown, the electronic device may include: a processor 810, a communication interface 820, a memory 830 and a communication bus 840, wherein the processor 810, the communication interface 820 and the memory 830 communicate with each other through the communication bus 840. The processor 810 may call the logic instructions in the memory 830 to execute the railway system RAMS analysis method based on MBSE, the method comprising: determining the RAMS requirements for the operation objectives to be met by the railway system operation according to the operation objectives; integrating the railway RAMS analysis method based on the pre-built railway system model and the RAMS requirements for the operation objectives, wherein the railway system model is built by the MBSE method; determining the system fault propagation law and behavior information according to the railway system model; performing the railway system RAMS analysis through the corresponding target RAMS analysis method in the integrated railway RAMS analysis method according to the system fault propagation law and behavior information, and obtaining the railway system RAMS analysis result.

[0073] In addition, the logic instructions in the above-mentioned memory 830 can be implemented in the form of a software functional unit and can be stored in a computer-readable storage medium when it is sold or used as an independent product. Based on this understanding, the technical solution of the present invention is essentially or the part that contributes to the prior art or the part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including a number of instructions to enable a computer device (which can be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the method described in each embodiment of the present invention. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), disk or optical disk and other media that can store program codes.

[0074] On the other hand, the present invention also provides a computer program product, which includes a computer program, and the computer program can be stored on a non-transitory computer-readable storage medium. When the computer program is executed by a processor, the computer can execute the MBSE-based railway system RAMS analysis method provided by the above-mentioned methods, and the method includes: determining the RAMS requirements for the operation objectives that the railway system operation should meet; integrating the railway RAMS analysis method based on a pre-constructed railway system model and the RAMS requirements for the operation objectives, wherein the railway system model is constructed by the MBSE method; determining the system fault propagation law and behavior information according to the railway system model; and performing railway system RAMS analysis according to the system fault propagation law and behavior information in the integrated railway RAMS analysis method through the corresponding target RAMS analysis method to obtain the railway system RAMS analysis result.

[0075] On the other hand, the present invention also provides a non-transitory computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, is implemented to execute the MBSE-based railway system RAMS analysis method provided by the above-mentioned methods, the method comprising: determining RAMS requirements oriented towards the operation objectives that the railway system operation should meet; integrating the railway RAMS analysis method based on a pre-constructed railway system model and the RAMS requirements oriented towards the operation objectives, wherein the railway system model is constructed by the MBSE method; determining system fault propagation laws and behavior information according to the railway system model; performing railway system RAMS analysis according to the system fault propagation laws and behavior information by using the corresponding target RAMS analysis method in the integrated railway RAMS analysis method to obtain a railway system RAMS analysis result.

[0076] The device embodiments described above are merely illustrative, wherein the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the scheme of this embodiment. Ordinary technicians in this field can understand and implement it without paying creative labor.

[0077] Through the description of the above implementation methods, those skilled in the art can clearly understand that each implementation method can be implemented by means of software plus a necessary general hardware platform, and of course, can also be implemented by hardware. Based on this understanding, the above technical solution is essentially or the part that contributes to the prior art can be embodied in the form of a software product, and the computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, a disk, an optical disk, etc., including a number of instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to execute the methods described in each embodiment or some parts of the embodiments.

[0078] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A railway system RAMS analysis method based on MBSE, characterized in that: include: Determine the RAMS requirements for the operational objectives that the railway system should meet based on the operational objectives; Integrating a railway RAMS analysis method based on a pre-built railway system model and RAMS requirements oriented to the operational objectives, wherein the railway system model is built using an MBSE approach; Determining system fault propagation rules and behavior information based on the railway system model; According to the system fault propagation law and behavior information, the railway system RAMS analysis is performed through the corresponding target RAMS analysis method in the integrated railway RAMS analysis method to obtain the railway system RAMS analysis result.

2. The method according to claim 1, characterized in that Determining RAMS requirements for the operational objectives that the railway system should meet according to the operational objectives includes: Determine the mission requirements that the railway system operation should meet according to the railway system operation scenario, wherein the mission requirements include punctuality, transportation volume, and safety; Based on the mission requirement analysis, RAMS requirements oriented to the mission requirements are determined.

3. The method according to claim 1 or 2, characterized in that: The railway system model includes a railway system physical structure model and a railway system functional behavior model; the method further includes: Analyze each component of the railway system to determine the system architecture, component elements and interface relationships of each component of the railway system; According to the architecture, constituent elements and interface relationships of each component of the railway system, the physical structure model of the railway system and the functional behavior model of the railway system are constructed by the MBSE method.

4. The method according to claim 3, characterized in that The railway RAMS analysis method based on the pre-built railway system model and the RAMS requirements oriented to the operation objectives includes: Analyze the impact of railway system failures and the transmission relationship between failures based on the railway system physical structure model and railway system functional behavior model; A railway RAMS analysis method is integrated based on the impact of the railway system failures, the transmission relationship between the failures and the RAMS requirements oriented to the operation objectives.

5. The method according to claim 1 or 2, characterized in that: Determining the system fault propagation law and behavior information according to the railway system model includes: The RAMS historical data of the railway system is obtained and the system fault propagation law and behavior information are determined based on the analysis of the RAMS historical data.

6. The method according to claim 5, characterized in that The railway system RAMS analysis is performed according to the system fault propagation law and behavior information by using a corresponding target RAMS analysis method in the integrated railway RAMS analysis method to obtain the railway system RAMS analysis result, including: Determine basic data required for RAMS analysis using the target RAMS analysis method based on the RAMS historical data and expert knowledge; According to the system fault propagation law, behavior information and basic data, the railway system RAMS analysis is performed by using the target RAMS analysis method to obtain the railway system RAMS analysis result.

7. The method according to claim 1, characterized in that The method further comprises: Performing system simulation verification on the railway system RAMS analysis results; Based on the railway system model and the railway system RAMS analysis results, train group operation simulation verification is carried out to evaluate the impact of different failure modes on the system RAMS.

8. A railway system RAMS analysis device based on MBSE, characterized in that: include: A determination module, for determining RAMS requirements for operation objectives that should be met by the railway system operation; an integration module for integrating a railway RAMS analysis method based on a pre-built railway system model and RAMS requirements oriented to the operation objectives, wherein the railway system model is built by an MBSE approach; The determination module is further used to determine the system fault propagation law and behavior information according to the railway system model; The analysis module is used to perform railway system RAMS analysis through the corresponding target RAMS analysis method in the integrated railway RAMS analysis method according to the system fault propagation law and behavior information, and obtain the railway system RAMS analysis result.

9. An electronic device comprising a memory, a processor, and a computer program stored in the memory and running on the processor, characterized in that: When the processor executes the computer program, the MBSE-based railway system RAMS analysis method according to any one of claims 1 to 7 is implemented.

10. A non-transitory computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the MBSE-based railway system RAMS analysis method according to any one of claims 1 to 7 is implemented.

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