Universal security platform risk analysis method, system and device and storage medium

Abstract

The invention belongs to the technical field of urban rail system safety analysis, and particularly relates to a universal safety platform risk analysis method, system and device and a storage medium, and the method comprises the steps: determining an output error of a universal safety platform system as a top event; distributing the safety integrity requirement of the top event to a safety function for protecting the top event; analyzing the failure mode of the safety function to construct a fault tree; simplifying the fault tree, and determining the structural importance and key risk factors of the basic events in the bottom events; according to the key risk factors and the MTBF, the fault rate of each bottom event is calculated, and the occurrence probability of the top event is obtained according to the fault rate. According to the method, the fault tree model accurately reflecting the system risk logic is constructed by combining the actual situation of the general safety platform, the key risk factors in the general safety platform are more comprehensively identified and quantitatively evaluated, and therefore powerful support is provided for safety management and risk prevention of the urban rail system.

Description

Technical Field

[0001] The present invention belongs to the technical field of urban rail system safety analysis, and in particular relates to a universal safety platform risk analysis method, system, device and storage medium. Background Art

[0002] With the development of the urban rail industry, safety platforms have played an important role in promoting flexible resource allocation and system expansion, and realizing economic value and social benefits. However, safety platforms may face various potential risks during operation, and how to effectively identify and prevent these potential risks has not yet been effectively solved.

[0003] As a logical causal relationship diagram, the fault tree analysis method can intuitively display the occurrence path of risk events and has important application value for analyzing safety platform risks. At present, in the urban rail industry, the fault tree analysis method is mainly aimed at traditional embedded platforms, but there is still a lack of effective methods for risk analysis of general safety platforms. Summary of the invention

[0004] In view of the above problems, the present invention provides a general security platform risk analysis method, system, device and storage medium, which can effectively perform risk analysis on the general security platform.

[0005] A general security platform risk analysis method of the present invention comprises:

[0006] Determine the general safety platform system output error as the top event;

[0007] Assign the safety integrity requirements of the top event to the safety functions that protect the top event;

[0008] Construct a fault tree by analyzing the failure modes of safety functions;

[0009] By simplifying the fault tree, the structural importance and key risk factors of the basic events in each bottom event are determined;

[0010] According to the key risk factors and MTBF, the failure rate of each bottom event is calculated, so as to obtain the probability of occurrence of the top event according to the failure rate; wherein MTBF is the mean time between failures.

[0011] Furthermore, the risk analysis results are output in a visual form, and corresponding measures are formulated based on the risk analysis results to reduce the probability of risk events occurring.

[0012] Furthermore, the security functions are communication interface functions and logic operation functions.

[0013] Furthermore, the analysis of the failure mode of the safety function to construct a fault tree specifically includes:

[0014] The failure modes of the communication interface function and the logic operation function are analyzed layer by layer from top to bottom until the bottom event is determined, thereby constructing a fault tree.

[0015] Furthermore, the bottom events are memory module failure, power module failure, mainboard module failure, hard disk module failure and network communication module failure.

[0016] Furthermore, the failure rate calculation formula is:

[0017]

[0018] Furthermore, the occurrence probability of the top event is calculated by inputting the failure rate into the software Isograph Reliability Workbench.

[0019] The present invention also provides a general security platform risk analysis system, the system comprising:

[0020] A top event determination module, used for determining a general safety platform system output error as a top event;

[0021] A safety integrity requirement allocation module is used to allocate the safety integrity requirements of the top event to the safety function protecting the top event;

[0022] A fault tree construction module is used to construct a fault tree by analyzing the failure modes of the communication interface function and the logic operation function layer by layer from top to bottom until the bottom event is determined;

[0023] The simplification module is used to determine the structural importance and key risk factors of basic events in each bottom event by simplifying the fault tree;

[0024] The calculation module is used to calculate the failure rate of each bottom event according to the key risk factors and MTBF, so as to obtain the occurrence probability of the top event according to the failure rate; wherein MTBF is the mean time between failures.

[0025] The present invention also provides a device, including a processor, which is coupled to a memory; the processor is used to read and execute the computer program stored in the memory to implement the aforementioned general security platform risk analysis method.

[0026] The present invention also provides a computer-readable storage medium storing a program or instruction. When the program or instruction is executed on a computer, the computer executes the aforementioned general security platform risk analysis method.

[0027] Compared with the prior art, the present invention has the following advantages:

[0028] 1. Wide applicability: The present invention is applicable to risk analysis of various security platforms;

[0029] 2. Clear logic: It can clearly show the path of risk events and facilitate the identification of key risk factors;

[0030] 3. Accurate quantitative analysis can provide a scientific basis for risk management and prevention;

[0031] 4. Visual output makes it easier for users to understand and apply analysis results. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. 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.

[0033] Figure 1 A schematic diagram of a general security platform risk analysis method of the present invention;

[0034] Figure 2 A schematic diagram of the structure of a general security platform risk analysis system of the present invention;

[0035] Figure 3 It is a schematic diagram of the structure of the electronic device of the present invention. DETAILED DESCRIPTION

[0036] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments 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.

[0037] The general safety platform system is a general computer safety platform system developed based on the international advanced safety platform; the platform adopts a two-by-two redundant structure design, and all components involved in safety information processing and transmission adopt a two-layer structure design in accordance with the "fail-safe" principle to meet the high reliability and high safety requirements of railway station signal control equipment. The platform has the characteristics of strong computing power, good scalability and low operation and maintenance workload, which greatly facilitates the operation and maintenance of ground equipment, and has a lower life cycle cost.

[0038] In one embodiment of the present invention, a general security platform risk analysis method is provided, such as Figure 1 As shown, the method includes:

[0039] Determine the general safety platform system output error as the top event;

[0040] Assign the safety integrity requirements of the top event to the safety functions that protect the top event;

[0041] Among them, the security functions are communication interface functions and logic operation functions.

[0042] The failure modes of the communication interface function and the logic operation function are analyzed layer by layer from top to bottom until the bottom event is determined, thereby constructing a fault tree;

[0043] The bottom events include memory module failure, power module failure, mainboard module failure, hard disk module failure and network communication module failure.

[0044] By simplifying the fault tree, the structural importance and key risk factors of the basic events in each bottom event are determined;

[0045] According to the key risk factors and MTBF, the failure rate of each bottom event is calculated, so as to obtain the probability of occurrence of the top event according to the failure rate; wherein MTBF is the mean time between failures;

[0046] The failure rate calculation formula is:

[0047]

[0048] The probability of occurrence of the top event is calculated by inputting the failure rate into the software Isograph Reliability Workbench.

[0049] The risk analysis results are output in a visual form, and corresponding measures are formulated based on the risk analysis results to reduce the probability of risk events occurring.

[0050] The embodiment of the present invention also provides a general security platform risk analysis system, such as Figure 2 As shown, the system comprises:

[0051] A top event determination module 201 is used to determine a general safety platform system output error as a top event;

[0052] The safety integrity requirement allocation module 202 is used to allocate the safety integrity requirements of the top event to the safety function of protecting the top event;

[0053] A fault tree construction module 203 is used to construct a fault tree by analyzing the failure modes of the communication interface function and the logic operation function layer by layer from top to bottom until the bottom event is determined;

[0054] A simplification module 204 is used to determine the structural importance and key risk factors of basic events in each bottom event by simplifying the fault tree;

[0055] The calculation module 205 is used to calculate the failure rate of each bottom event according to the key risk factors and MTBF, so as to obtain the occurrence probability of the top event according to the failure rate; wherein MTBF is the mean time between failures.

[0056] like Figure 3 As shown, an embodiment of the present invention further provides a device, including: a processor 301, the processor 301 is coupled to a memory 302, and the processor 301 is used to read and execute a computer program stored in the memory 302 to implement the general security platform risk analysis method as described in the above method embodiment.

[0057] An embodiment of the present invention further provides a computer-readable storage medium storing a program or instruction. When the program or instruction is executed on a computer, the computer executes the general security platform risk analysis method as described in the above method embodiment.

[0058] 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 substitutions for some of the technical features therein; and these modifications or substitutions do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A general security platform risk analysis method, characterized in that: The method comprises: Determine the general safety platform system output error as the top event; Assign the safety integrity requirements of the top event to the safety functions that protect the top event; Construct a fault tree by analyzing the failure modes of safety functions; By simplifying the fault tree, the structural importance and key risk factors of the basic events in each bottom event are determined; According to the key risk factors and MTBF, the failure rate of each bottom event is calculated, so as to obtain the probability of occurrence of the top event according to the failure rate; wherein MTBF is the mean time between failures.

2. The method according to claim 1, characterized in that The risk analysis results are output in a visual form, and corresponding measures are formulated based on the risk analysis results to reduce the probability of risk events occurring.

3. The method according to claim 1, characterized in that: The safety functions are communication interface functions and logic operation functions.

4. The method according to claim 1, characterized in that The failure mode of the safety function is analyzed to construct a fault tree, which specifically includes: The failure modes of the communication interface function and the logic operation function are analyzed layer by layer from top to bottom until the bottom event is determined, thereby constructing a fault tree.

5. The method according to claim 1, characterized in that The bottom events are memory module failure, power module failure, mainboard module failure, hard disk module failure and network communication module failure.

6. The method according to claim 1, characterized in that The failure rate calculation formula is:

7. The method according to claim 1, characterized in that The probability of occurrence of the top event is calculated by inputting the failure rate into the software Isograph Reliability Workbench.

8. A general security platform risk analysis system, characterized in that: The system comprises: A top event determination module, used for determining a general safety platform system output error as a top event; A safety integrity requirement allocation module is used to allocate the safety integrity requirements of the top event to the safety function protecting the top event; A fault tree construction module is used to construct a fault tree by analyzing the failure modes of the communication interface function and the logic operation function layer by layer from top to bottom until the bottom event is determined; The simplification module is used to determine the structural importance and key risk factors of basic events in each bottom event by simplifying the fault tree; The calculation module is used to calculate the failure rate of each bottom event according to the key risk factors and MTBF, so as to obtain the occurrence probability of the top event according to the failure rate; wherein MTBF is the mean time between failures.

9. A device, characterized in that: comprising a processor coupled to a memory; The processor is used to read and execute the computer program stored in the memory to implement the general security platform risk analysis method according to any one of claims 1 to 7.

10. A computer-readable storage medium, characterized in that: A program or instruction is stored, and when the program or instruction is executed on a computer, the computer is caused to execute the general security platform risk analysis method according to any one of claims 1 to 7.

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