Testability modeling method based on hybrid diagnostic model

A diagnostic model and modeling method technology, applied in the field of testability, can solve problems such as poor environmental adaptability, poor flexibility, high false alarm and missed detection rate, improve testability and diagnosis level, and reduce life cycle costs , the effect of shortening the R & D cycle

Inactive Publication Date: 2016-07-27
BEIJING AEROSPACE MEASUREMENT & CONTROL TECH
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Problems solved by technology

[0007] But on the whole, these decision-making models and methods have more or less limitations, mainly in: the ability to deal with uncertainties needs to be improved, the ability to express and integrate multi-source information is relatively weak, and the flexibility is poor.
At the same time, the diagnostic experience cannot be used in time, the adaptability to the environment is not good, and the false alarm and missed detection rates are high.
[0008] For the above-mentioned problems in related technologies, no effective solution has been proposed yet

Method used

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  • Testability modeling method based on hybrid diagnostic model
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  • Testability modeling method based on hybrid diagnostic model

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Embodiment 1

[0036] figure 1 is a flowchart of a test modeling method based on a hybrid diagnostic model according to Embodiment 1 of the present invention, such as figure 1 As shown, including (step A-step D):

[0037] Step A, divide the structure and function of the hybrid diagnostic model according to the hierarchy of the system structure and function, and divide the hybrid diagnostic model into basic functional components and functional units using a hierarchical method to achieve system-level Test modeling of , to obtain a hierarchical directed graph model; specifically, such as figure 2 The hierarchical structure diagram of the complex equipment shown is divided into multiple subsystems by the system, and each subsystem is further divided into multiple modules.

[0038] Step B, on the basis of the layered directed graph model, fusing the integrated testability model to realize component-level testability modeling;

[0039] Step C, through the high-order dependencies between funct...

Embodiment 2

[0049] This example introduces a hierarchical directed graph model, such as Figure 5 The structure schematic diagram of the hierarchical directed graph model shown in the figure, the specific implementation steps are as follows.

[0050] The hierarchical directed graph model realizes the decomposition of complex equipment into subsystems, and the subsystems are decomposed into lower-level components. Similar to the tree model, this hierarchical relationship is expressed in the form of connections; in the same level, multiple directed graphs are used to Indicates the functional propagation relationship between units. From Figure 5 It can be seen from the figure that the units surrounded by multiple dotted lines on the same layer are independent and will not interfere with each other.

[0051] The hierarchical directed graph model not only meets the requirements of complex equipment structure and function, but also embodies the idea of ​​modular design. The complex equipment...

Embodiment 3

[0061] This embodiment provides a component-level testability modeling method based on a hybrid diagnostic model, and integrates an equipment integration testability model on the basis of a layered directed graph model. The composition diagram of the integrated testing model of complex equipment is as follows: Figure 6 As shown, it mainly includes structure model, test description model, maintenance model and diagnosis model.

[0062] 1) Structural model

[0063] The structural model includes object hierarchy, constituent entities, functional information, fault information, and observation information.

[0064] 2) Test description model

[0065] The test description model mainly includes observation attributes, resource constraints, test output and test environment.

[0066] 3) Maintenance model

[0067] The maintenance model is used to describe the maintenance process information of the equipment.

[0068] 4) Diagnostic model

[0069] A diagnostic model consists of thr...

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Abstract

The invention discloses a testability modeling method based on a hybrid diagnostic model. According to the method, on the basis of the hybrid diagnostic model, system level testability modeling is realized through adoption of a hierarchical modeling method; on this basis, component level testability modeling is realized through integrating a structure model, a test description model, a maintenance model and a diagnostic model. In the outline design stage of a device, module division and function description are realized through top-down modeling; and in the detailed design stage of the device, the detailed design of each function module is realized through bottom-up modeling. The method is significant in improving the testability and diagnostic level of the device, reducing the whole life cycle cost, accelerating upgrade and update of the device and effectively shortening the development cycle of the device. According to the method, the diagnostic strategy of the hybrid diagnostic model is optimized through adoption of a diagnostic method based on a particle swarm optimization algorithm. Through adoption of the method, fault isolation precision demanded by the user and the diagnostic strategy with relatively low average test cost can be generated. The method has the practical application value specific to the complex device.

Description

technical field [0001] The invention relates to the field of testability, in particular to a testability modeling method based on a mixed diagnosis model. Background technique [0002] Testability is an important design feature of systems and equipment that is convenient for testing and diagnosis, and has a great impact on the maintainability, reliability and usability of modern weaponry and various complex systems, especially electronic systems and equipment. A good testable design can improve the combat readiness of the equipment, the reliability and safety of the mission, shorten the maintenance time, reduce the system use guarantee time, and greatly reduce the life cycle cost of the equipment. Whether it is information flow model, multi-signal flow diagram model or mixed diagnosis model, they only describe one factor that affects system testability, and they are usually used as a tool for predicting, evaluating and analyzing system testability. For information such as s...

Claims

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Application Information

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IPC IPC(8): G06F17/50
Inventor 李俊杰张强
Owner BEIJING AEROSPACE MEASUREMENT & CONTROL TECH
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