Online fault diagnosis method for hydraulic system

A fault diagnosis and hydraulic system technology, applied in fluid pressure actuation system testing, fluid pressure actuation devices, mechanical equipment, etc., can solve problems such as inability to efficiently diagnose real-time faults, accurate fault location, and maintenance decision-making support gaps, and achieve Good human-computer interaction performance, fault location, and system versatility

Inactive Publication Date: 2014-09-24
BEIJING MECHANICAL EQUIP INST
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Problems solved by technology

[0004] The purpose of the present invention is to provide an online fault diagnosis method for a hydraulic system to solve the problem that there is still a large gap between efficient real-time fault diagnosis, accurate fault location and maintenance decision support

Method used

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  • Online fault diagnosis method for hydraulic system

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Embodiment Construction

[0027] The specific steps of a hydraulic system online fault diagnosis method are as follows:

[0028] The first step is to build a hydraulic online fault diagnosis system

[0029] Hydraulic online fault diagnosis system, including: hydraulic system 1, sensor network 2, industrial computer 3, data reading module 4, data feature extraction module 5, fault simulation module 6, fault diagnosis module 7, fault location module 8 and man-machine interface 9.

[0030] The function of the data reading module 4 is: read the signal data collected by the sensor network 2 through the data acquisition card I / O port installed in the industrial computer 3; the function of the data feature extraction module 5 is: by filtering, read the data The key feature is to prepare for fault diagnosis; the function of the fault simulation module 6 is: perform fault injection simulation through the system model to obtain the fault simulation data of the hydraulic system; the function of the fault diagnos...

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Abstract

The invention discloses an online fault diagnosis method for a hydraulic system. A sensor network (2) and an industrial personal computer (3) are used for acquiring a signal of a key position of the hydraulic system (1). Meanwhile, a system model is established for the hydraulic system (1), and fault injection simulation is carried out to obtain a simulation result serving as fault simulation data in a fault simulation module (6). The key characteristic information of the data provided by a data reading module (4) is found by a data characteristic extraction module (5), and fault diagnosis is carried out through a fault diagnosis module (7). A fault positioning module (8) can be used for positioning the fault according to fault information obtained by the fault diagnosis module (7), and providing a fault diagnosis result, fault causes, a detection flow and fault elimination measures, which are all displayed on a human-computer interface (9). According to the method, the false fault alarm rate is reduced, the capacities such as early warning are improved, and the method plays an important role in improvement of the reliability of the hydraulic system of product equipment.

Description

technical field [0001] The invention relates to a hydraulic system fault diagnosis method, in particular to a hydraulic system online fault diagnosis method. Background technique [0002] With the increasing reliability requirements of modern products, it is required to accurately and quickly diagnose and locate faults, and provide auxiliary decision support for maintenance personnel, thereby effectively reducing maintenance downtime and improving the maintainability and comprehensive support of product equipment. The original mode of relying on designers for fault location and maintenance is far from meeting the needs. [0003] At present, the hydraulic system equipped with ordinary products has the ability to realize the monitoring of conventional signals such as system pressure, flow, temperature and fuel tank level. Engineers can judge the failure of system components based on experience, but this judgment is generally in After an obvious fault occurs in the system, and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F15B19/00
Inventor 李鑫张利剑崔广志吕戎
Owner BEIJING MECHANICAL EQUIP INST
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