Method for selecting function-maintenance testing points of avionic assembly

A technology for maintenance testing and components, applied in analog circuit testing, electronic circuit testing, etc., can solve problems such as fuzzy set division and insufficient optimization of test point selection, and achieve the effects of reducing maintenance costs, improving processes, and saving maintenance resources

Active Publication Date: 2013-05-01
CIVIL AVIATION UNIV OF CHINA
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Problems solved by technology

After analyzing the advantages and disadvantages of the traditional fault dictionary method and the improved fault dictionary method, combined with the actual circuit for simulation, in order to successfully solve the problem of insufficient optimization of traditional fuzzy set division and test point selection, and then improve the efficiency of fault detection and isolation of analog circuit systems

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  • Method for selecting function-maintenance testing points of avionic assembly
  • Method for selecting function-maintenance testing points of avionic assembly
  • Method for selecting function-maintenance testing points of avionic assembly

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Embodiment Construction

[0050] The present invention will be further described below in conjunction with the accompanying drawings.

[0051] Such as Figure 1 to Figure 5 As shown, the present invention is based on the mathematical model of fuzzy cluster analysis and the division of dynamic fuzzy cluster analysis. On the basis of this fuzzy set, a mathematical model for optimal test points is established.

[0052] First use PSPICE (PSPICE is a general-purpose circuit analysis program for microcomputer series developed by SPICE (Simulation Program with Integrated Circuit Emphasis). It was developed by the computer-aided design team of the University of California, Berkeley in 1972 using FORTRAN language. , mainly used in the computer-aided design of large-scale integrated circuits.) The fault simulation of the components in the analog circuit is carried out to obtain the node voltage increment, and the equivalent transformation is performed on the similarity matrix to obtain the fuzzy equivalent matri...

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Abstract

The invention discloses a method for selecting the function-maintenance testing points of an avionic assembly, which comprises the following steps of: carrying out classification analysis on an analog-circuit testing method, and carrying out the focused analysis of a fault dictionary method; establishing a preferred mathematical model of the testing points on the basis of a fuzzy set; selecting an optimal testing point, wherein the testing points are as few as possible; and establishing a preferred strategy of the testing points, making a preferred scheme of the testing points through the mathematical model and a fault-diagnosis analyzing method, and realizing the highest fault-detecting rate and the highest fault-isolating rate with the lowest testing cost. The invention provides a new preferred testing-point algorithm, and practical circuits are combined for simulation, so that the problem that the division of a traditional fuzzy set and the selection of the testing points are not optimized enough is solved, and the fault detecting and isolating efficiency of an analog-circuit system is improved.

Description

technical field [0001] The invention relates to the technical field of avionics equipment testing, in particular to a method for selecting test points for function maintenance of avionics components. Background technique [0002] At present, the development of analog circuit fault test theory is relatively slow. There are roughly two reasons: one is that the integration of analog systems is low, and the scale of traditional analog circuits is also small. Therefore, manual testing and maintenance can also meet actual needs, and industrial production There is no urgent requirement like relatively large-scale digital system testing, so the research on testing and diagnosis of analog circuits lacks strong motivation. Another reason is that the testing and diagnosis of analog circuits is far more difficult than that of digital systems. Therefore, both in theory and in methods are still mature, and there are relatively few practical methods. The main reasons are: [0003] 1. The...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/316
Inventor 周德新王凯樊智勇詹湘琳刘岱刘涛
Owner CIVIL AVIATION UNIV OF CHINA
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