Ship lift anti-collision buffer hydraulic system buffer oil cylinder internal leakage fault diagnosis method

Abstract

The invention discloses a ship lift anti-collision buffer hydraulic system buffer oil cylinder internal leakage fault diagnosis method, which comprises the steps of establishing an initial hydraulic system simulation model, and carrying out steady-state and dynamic simulation calculation to obtain an oil cylinder internal leakage fault working condition simulation data set; correcting the flow coefficient, the Reynolds number and the friction coefficient parameter to obtain an improved hydraulic system simulation model; changing the clearance amount, and performing simulation calculation on the improved hydraulic system simulation model to obtain a buffer oil cylinder output data set; selecting a buffer piston time domain displacement signal, and establishing the relation between the buffer piston time domain displacement signal and the oil cylinder gap and the relation between the buffer piston time domain displacement signal and internal leakage faults; extracting displacement signals of a piston rod of the buffer oil cylinder, establishing sample sets corresponding to different internal leakage fault modes, and dividing the sample sets into training samples and test samples; through a convolutional neural network based on an Adam optimization algorithm, realizing internal leakage fault diagnosis of different internal leakage fault modes. According to the invention, the accuracy and diagnosis efficiency of leakage fault diagnosis in the buffer oil cylinder of the hydraulic system are improved.

Description

technical field [0001] The invention relates to the technical field of fault diagnosis of a ship lift anti-collision buffer hydraulic system, in particular to a method for diagnosing a fault diagnosis method for a buffer cylinder internal leakage of a ship lift anti-collision buffer hydraulic system. Background technique [0002] The anti-collision and buffer hydraulic system of the ship lift has a complex structure, which is composed of many components with coupling relationship with each other, and is an important part of the ship lift. When the ship crosses the dam and hits the ship lift due to out of control, the anti-collision buffer hydraulic system can play the role of braking buffer. The buffer cylinder is an important part of the hydraulic system, and its performance directly affects the work of the anti-collision buffer hydraulic system state, and even affect the safety and reliability of the ship lift. Due to the characteristics of concealment, diversity, uncerta...

AI Technical Summary

Problems solved by technology

[0004] Aiming at the problems of complicated operation, low efficiency and low diagnostic accuracy existing in the existing hydraulic system internal leakage fault diagnosis technology

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