A method and system for intelligent fault judgment of a hydraulic valve remote control system

Abstract

The present invention provides a method and system for intelligent fault judgment of a hydraulic valve remote control system, comprising the following steps: (1) data collection; (2) data preprocessing and feature extraction; (3) calling an expert rule database; (4) system Fault diagnosis: compare the preprocessed real-time data and the extracted hydraulic curve fluctuation characteristics with the expert system strategy parameters to determine whether the safety alarm condition is triggered; (5) Alarm output: when the safety alarm condition is triggered, an abnormal state alarm is issued. The invention can realize on-line state identification and fault monitoring by establishing an expert rule database, does not need to carry out fault diagnosis test alone, and does not cause hidden dangers in production.

Description

technical field [0001] The invention belongs to the technical field of fault identification of hydraulic accumulators, and more particularly relates to a method and system for intelligent identification of faults in a hydraulic valve remote control system. Background technique [0002] The hydraulic accumulator is a key component of the hydraulic system. Since the hydraulic oil is an incompressible liquid, the hydraulic oil cannot accumulate pressure energy. Therefore, the compressibility of the gas can be used to accumulate the pressure energy of the hydraulic oil. The hydraulic accumulator is composed of an oil storage unit and a gas storage unit with an independent air-tight compressed gas space. The common accumulators are piston type and bladder type. When the hydraulic pressure rises, the oil enters the accumulator, the gas is compressed, and the pressure of the hydraulic system no longer rises significantly; when the pressure of the accumulator drops, the compressed g...

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Problems solved by technology

[0003] In the actual operation of the accumulator, as the gas storage unit continues to be compressed and expanded, there may be abnormal states such as a decrease in the gas storage capacity and a complete failure of the gas storage function, which will affect the reliable operation of the hydraulic system

Since the gas storage unit and the oil storage unit are generally in a closed metal container, it is impossible to directly observe and detect the operation of the gas storage unit. Therefore, how to find and judge the abnormal state of the gas storage unit is an important factor to ensure the normal operation of the hydraulic system. content

The current detection method mainly has the following problems: First, the operation of the accumulator needs to be stopped, which has great hidden dangers in the actual system operation; second, it needs to be connected to high-pressure nitrogen for testing, which requires a certain test time, further increasing the hidden dangers of operation ; In addition, the judgment process requires manual operation, recording, calculation, and judgment, which is relatively cumbersome

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