Novel fault positioning method

A new type of fault location technology, applied in aircraft component testing, aircraft parts, ground devices, etc., can solve problems such as time-consuming and labor-intensive, and cannot guarantee the effect, and achieve the effect of simple use, strong promotion and application value, and lower operating threshold

Active Publication Date: 2012-09-26
XIAN AIRCRAFT DESIGN INST OF AVIATION IND OF CHINA
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AI Technical Summary

Problems solved by technology

[0004] At present, in the full-scale test of the aircraft fuel system, if a fault occurs, the engineering experience of experts is often used to conduct on-site investigations. If it

Method used

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Example Embodiment

[0046] Example

[0047] Take the aircraft fuel system as an example, combined with figure 2 , A detailed description of the new fault location method of the present invention:

[0048] Step 1. Fuel system decomposition

[0049] According to the principle of functional independence, the fuel system is decomposed. In this embodiment, the independent components include FR215, FR216, FR25C, the front fuel supply pump, and the rear fuel supply pump.

[0050] Step 2. Establish a database of fuel system experts

[0051] Take the independent component FR216 in the fuel system as an example. The characteristic parameters related to the working state of FR216 are FR216 inlet pressure, FR216 outlet pressure, FR216 outlet flow. If FR216 is working normally, FR216 inlet pressure is between 110-130KPa, FR216 The outlet pressure is between 100-120, and the outlet flow of FR216 is between 0-50m3 / h. The permutation and combination form expert database table 1;

[0052] Table 1

[0053] Parts

[0054]...

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Abstract

The invention belongs to a fault diagnosis technology, and relates to a novel fault positioning method. The novel fault positioning method comprises the following steps of: firstly, dividing a system into parts, determining a characteristic value of each part, and establishing an expert database; secondly, obtaining a real-time characteristic value of each part by using a sensor, a test channel and a computer; thirdly, querying the expert database to obtain theoretical criteria by using the computer, and generating actual criteria by combining the accuracy of test equipment; and finally, determining the working state of each part, and displaying. By the method, a system fault can be dynamically tracked, intelligently positioned and processed by the expert database serving as a background, the operation threshold can be reduced, and a large amount of labor cost is saved; and the method is easy to use and high in popularization and application value.

Description

technical field [0001] The invention belongs to fault diagnosis technology and relates to a novel fault location method. Background technique [0002] Aircraft is a complex comprehensive system, involving dozens of professional fields and tens of thousands of parts and components. Under such a complex system, it is a waste of resources to rely on manpower to troubleshoot and locate faults. [0003] The United States and other western countries began to study fault diagnosis technology as early as the 1950s. With the development of computer technology, the current fault diagnosis system has developed from the original single fault diagnosis expert system of each subsystem to an integrated health management (IVHM) system integrating system status monitoring, fault diagnosis and fault repair. [0004] At present, in the full-scale test of the aircraft fuel system, if a failure occurs, the engineering experience of experts is often used to conduct on-site investigations. If it ...

Claims

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Application Information

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IPC IPC(8): B64F5/00B64F5/60
Inventor 代井波佟兴嘉林厚焰马海峰
Owner XIAN AIRCRAFT DESIGN INST OF AVIATION IND OF CHINA
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