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Reliability analyzing method based on GSPN reliability model

An analysis method and reliability technology, applied in the direction of instrumentation, adaptive control, control/regulation system, etc., can solve problems such as inability to calculate

Inactive Publication Date: 2012-07-11
BEIHANG UNIV
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  • Application Information

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Problems solved by technology

When there is a hidden absorption loop in the system modeling, the above algorithm is used to calculate the reliability, and the formula (2) cannot be calculated, and it is impossible to locate the wrong part of the model modeling. The modeler needs to check the system model again in detail.

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  • Reliability analyzing method based on GSPN reliability model
  • Reliability analyzing method based on GSPN reliability model
  • Reliability analyzing method based on GSPN reliability model

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Embodiment Construction

[0078] The present invention will be further described below in conjunction with accompanying drawing:

[0079]The implementation of this method has the following requirements for the GSPN model: (1) the reachable state set of the GSPN model is limited; (2) the trigger probability of the timed transition in the GSPN model obeys the exponential distribution function The real parameter λ in the distribution function t That is, the failure rate of the components of the flight control system. Due to the high reliability requirements of the flight control system, its order of magnitude is generally 10 -3 The following; (3) the method is implemented on a computer using Matlab software. To ensure computational efficiency, the basic configuration of the computer is CPU 2.80GHz and internal memory 1G.

[0080] See figure 1 , a kind of reliability analysis method based on GSPN reliability model of the present invention, the concrete steps of this method are as follows:

[0081] Step...

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Abstract

The invention discloses a reliability analyzing method based on a GSPN reliability model, which comprises five steps: 1, analyzing from the initial state of a GSPN model and recording the initial explicit state in a reachable matrix ReachStaMat; 2, sequentially analyzing each state in the reachable matrix ReachStaMat and recording the next explicit state (set) to which each state can be transferred in the ReachStaMat; 3, solving the transfer rate matrix of a continuous time Markov chain by the obtained matrix GeneratMat; 4, solving the system reliability by the transfer rate matrix of the Markov chain according to a Markov dynamic process; and 5, ending the analysis. The invention is provided for the computer automated solving process of the GSPN reliability model of a flight control system, the method saves the internal memory space of the computer, increases the computing efficiency, and simultaneously is beneficial to pointing out inappropriate points of system modeling. The invention has practical value and wide application prospects in the technical field of reliability analysis.

Description

(1) Technical field [0001] The invention relates to a reliability analysis method based on a GSPN reliability model, which is mainly aimed at the reliability analysis technology of a flight control system and belongs to the field of reliability analysis technology. (2) Background technology [0002] Scholars at home and abroad have done a lot of research on reliability analysis and proposed many models and methods, such as reliability block diagram, fault tree analysis method, failure mode and effect analysis method, Markov and Petri net model, etc. Among them, Petri net has both graphical modeling capabilities and mathematical computing capabilities, and is suitable for modeling and analyzing asynchronous concurrent systems. It can be used for both static structural analysis and dynamic behavior analysis. [0003] Stochastic Petri Nets (SPNs) have been widely used in reliability analysis and performance analysis. The basic idea of ​​Stochastic Petri Nets is: for each timed ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G05B13/04
Inventor 孙晓哲李卫琪陈宗基董卓宁
Owner BEIHANG UNIV