Reliability analysis method for embedded safety-critical system

A safety-critical system and analysis method technology, applied in the field of reliability analysis, can solve problems such as difficult to meet the requirements of high reliability analysis, and achieve the effect of evaluating reliability

Inactive Publication Date: 2011-04-27
BEIJING INSTITUTE OF TECHNOLOGYGY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] However, in embedded safety-critical systems where software and hardware are highly coupled and faults

Method used

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  • Reliability analysis method for embedded safety-critical system
  • Reliability analysis method for embedded safety-critical system
  • Reliability analysis method for embedded safety-critical system

Examples

Experimental program
Comparison scheme
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Embodiment Construction

[0041] The technical solutions of the present invention will be described in detail below in conjunction with specific embodiments.

[0042] Its operation process is as follows:

[0043] Step 1. In this example, a platform aviation display control system is used to construct a software and hardware fault representation set. The software and hardware structure of the system is shown in Table 1. According to the historical fault information of the constituent units of each level, the fault characterization set is listed, as shown in Table 2.

[0044] Table 1 The hardware and software composition table of a certain platform aviation display control system

[0045]

[0046] Table 2 Software and hardware fault characterization set

[0047] serial number

name

failure mode

1

power supply

electricity failure

2

FPGA chip

FPGA chip logic output failure

3

integrated circuit 1

Integrated circuit 1 performance degradatio...

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Abstract

The invention relates to a reliability analysis method for an embedded safety-critical system, and belongs to the technical field of information safety. The method comprises the following steps of: constructing a software and hardware fault representation set; classifying faults in the fault representation set to acquire a software and hardware fault mode set and constructing a subsequent fault mode set by combining a fault-associated probability table; constructing a static fault tree associated with a software and hardware fault on the basis of the subsequent fault mode set; and analyzing the static fault tree to acquire a fault analysis result. In the method, software and hardware basic units of the embedded safety-critical system are subdivided, a subsequent fault mode is constructed through a fuzzy probability multi-signal flow graph model by combining association of faults of each basic unit, a static fault tree model is constructed by using time sequence logic relation between the faults reflected by the subsequent fault mode set, and the reliability of the system can be more accurately and effectively evaluated by using the model.

Description

technical field [0001] The invention relates to a reliability analysis method for an embedded safety-critical system, which belongs to the technical field of information safety. Background technique [0002] An embedded safety-critical (Safety-Critical) system is an embedded system that includes electronic devices, mechanical components and software. Embedded safety-critical systems refer to the embedded systems used in safety-critical fields, such as loss of life or property, damage to the environment, loss or leakage of information, etc., if the system function fails, which will cause serious consequences. Therefore, research on the reliability of embedded safety-critical systems has become an important means to improve system reliability and security. Traditional system fault diagnosis and reliability analysis are mostly divided into two aspects of hardware and software to be considered separately. [0003] At present, the system fault diagnosis and reliability analysis...

Claims

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Application Information

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IPC IPC(8): G06F11/00
Inventor 胡昌振闫怀志李楠王崑声
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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