DCS reliability evaluation method based on dynamic evidence network

An evaluation method and reliability technology, which is applied in the field of DCS reliability evaluation based on dynamic evidence network, can solve the problems of large amount of calculation, complicated calculation process, and difficulty in obtaining failure rate data, etc., and achieve a small amount of calculation and simple reasoning method Effect

Inactive Publication Date: 2018-11-16
SHANGHAI UNIVERSITY OF ELECTRIC POWER
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Problems solved by technology

The traditional evaluation method is based on the determined failure rate data, but it is sometimes difficult to obtain the exact failure rate data in the actual evaluation process. It is often a large amount of text data such as evaluation reports and expert opinions that reflect the status of equipment or systems. large cognitive uncertainty
The traditional DCS reliability evaluation method has a complicated calculation process and a large amount of calculation, which is not suitable for the reliability evaluation of complex dynamic systems.

Method used

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  • DCS reliability evaluation method based on dynamic evidence network
  • DCS reliability evaluation method based on dynamic evidence network
  • DCS reliability evaluation method based on dynamic evidence network

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Embodiment

[0046] The invention relates to a DCS reliability evaluation method based on a dynamic evidence network. The method is applied to a DCS reliability evaluation system based on a dynamic evidence network. The system includes a component reliability function generation module, a dynamic evidence network establishment module and evidence Reasoning calculation module. The output of the component reliability function generation module and the output of the dynamic evidence network establishment module are respectively connected with the input of the evidence reasoning calculation module. The output of evidence reasoning calculation module is system reliability.

[0047] This embodiment considers a simple DCS system, which includes a pair of redundant power supplies P1 and P2, a pair of redundant DPUs: D1 and D2, and two cards IN1 and IN2. Analysis of DCS reliability evaluation system based on dynamic evidence network.

[0048] like figure 1 As shown, a DCS reliability evaluation ...

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Abstract

The invention relates to a DCS reliability evaluation method based on a dynamic evidence network. The method comprises the following steps of 1) obtaining text data for evaluating the reliability of acomponent, and calculating a probability reliability function of the basic component according to the obtained text data; 2) analyzing a system structure, and establishing the dynamic evidence network; 3) performing evidence reasoning according to the dynamic evidence network, thereby obtaining system reliability; and 4), evaluating the system reliability and the uncertainty. Compared with the prior art, the method has the advantages of simple reasoning method, capability of effectively expressing cognitive uncertainty information, small calculation amount and the like.

Description

technical field [0001] The invention relates to the technical field of reliability evaluation, in particular to a DCS reliability evaluation method based on a dynamic evidence network. Background technique [0002] With the development of industrial automation, the reliable operation of DCS (Distributed Control System, Distributed Control System) becomes more and more important. The traditional evaluation method is based on the determined failure rate data, but it is sometimes difficult to obtain the exact failure rate data in the actual evaluation process. It is often a large amount of text data such as evaluation reports and expert opinions that reflect the status of equipment or systems. large cognitive uncertainty. The traditional DCS reliability evaluation method has a complicated calculation process and a large amount of calculation, so it is not suitable for the reliability evaluation of complex dynamic systems. Contents of the invention [0003] The object of the...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06N5/04G06F17/30G06K9/62
CPCG06N5/04G06F18/25G06F18/257
Inventor 石峰健苏晓燕钱虹古雅琦李栌苏陈秋冬
Owner SHANGHAI UNIVERSITY OF ELECTRIC POWER
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