A method for multi-directional search of dynamic system state probability mapping matrix

Abstract

A method for multi-direction search of dynamic system state probability mapping matrix include the following: establishing the model of system simulation and fault injection, performing the discretization of system state space, randomly sampling a system originate grid element point, configuring system component status, setting simulation time step length and simulation test times, importing system originating grid element point information into simulation model through function assignment, executing and completing simulation test, counting system trajectory migration distribution in grid element, calculating system state conditional migration probability, generating system state transition probability matrix, and establishing system dynamic probability mapping network; initializing the search parameters, carrying out matrix dynamic search analysis, realize the path identification and search of the important risk sequence, calculate and predict the probability distribution of the system reliability with time. The invention can be used for generating system dynamic trajectory and state transition probability matrix, supporting matrix multi-direction searching calculation and obtaining dynamic reliability evaluation index.

Description

Technical field [0001] The invention relates to the fields of mathematical statistics and simulation analysis, and in particular to a multi-directional search method for a dynamic system state probability mapping matrix. Background technique [0002] In recent years, with the rapid development of digital system technology, nuclear power plants are also facing the trend of digital upgrading and comprehensive application of their instrument and control systems. The instrument and control system, as the brain nerve of the nuclear power plant, carries the supervision and control of each parameter in the system. Once system failure or failure occurs, it will directly affect or damage the safe operation of the nuclear power plant. Due to the potential risk of radioactive material release in nuclear power, nuclear power plants have special and strict requirements for the safety and reliability of digital technology products that are different from other industries. [0003] Compared with...

AI Technical Summary

Problems solved by technology

Traditional reliability modeling and analysis methods such as fault tree / event tree methods can no longer meet the complex dynamic interaction process analysis requirements of digital instruments and control systems. A new type of reliability analysis method with the unique and complex characteristics of the control system, thereby realizing the dynamic reliability and safety evaluation of the digital process interaction, and providing review technical support for the authorization and application process of the digital instrumentation and control system of nuclear power plants

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