Buffer balance valve fault diagnosis method based on full-connection neural network

Abstract

The invention provides a buffer balance valve fault diagnosis method based on a full-connection neural network, and relates to the technical field of fault diagnosis. The method comprises the following steps: connecting a to-be-diagnosed buffer balance valve to an oil path of a test bed, and respectively measuring the pressure of a port B and the pressure of a port T through a pressure sensor in a normal state, a wear state and a clamping stagnation state; preprocessing the obtained pressure difference data of the port B and the port T to form a data set for model training; constructing a full-connection neural network model, and training the pressure data in the data set through the full-connection neural network model; adjusting the parameters and the structure of the full-connection neural network model according to the fault classification precision so as to obtain the full-connection neural network model with the optimal local network structure; and inputting pressure data of the to-be-diagnosed buffer balance valve into the trained full-connection neural network model to obtain a fault diagnosis result of the to-be-diagnosed buffer balance valve. The diagnosis method has the advantages of rapidness, stability and accuracy.

Description

technical field [0001] The invention relates to the technical field of fault diagnosis, in particular to a fault diagnosis method for a buffer balance valve based on a fully connected neural network. Background technique [0002] Rotary drilling rig is a large-scale construction machinery with a high degree of electromechanical and hydraulic integration. Its main structure includes a walking system, a working system and a rotary system. The rotary system is one of the main structures of the rotary drilling rig, and the buffer balance valve is an important part of the rotary system. The working environment of rotary drilling rig is harsh, and there are often large particles of pollutants in the oil, which cause rapid wear of the balance valve or jam failure. High-pressure fluid with contaminating particles can cause serious damage to various components when it flows through the hydraulic system. Among them, the valve core of the buffer balance valve will wear quickly under ...

AI Technical Summary

Problems solved by technology

However, this method tends to converge to a local minimum, loses a lot of valuable information, ignores the correlation between the whole and the local, lacks certain stability, and has low diagnostic accuracy

[0006] It can be seen that the existing hydraulic valve fault diagnosis methods cannot achieve high performance, fast and stable fault diagnosis

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