A relay valve fault diagnosis method and device

Abstract

The invention discloses a fault diagnosis method and device for a relay valve, wherein the method includes: obtaining the main air cylinder, the equalizing air cylinder, and the train pipe in different fault types of the relay valve from the real train equalization module and the simulation platform of the train equalization module The pressure time series; for each fault type, the pressure time subsequence is intercepted according to the air filling and exhaust cycle of the train pipe, and the pressure characteristic value is extracted from it, and the air inlet valve action frequency and Exhaust valve action frequency, set up training data; use the training data and corresponding fault types as input and output data respectively, train the neural network model, and obtain the relay valve fault diagnosis model; use the relay valve fault diagnosis model to diagnose the relay to be tested Type of failure of the valve. The present invention acquires more training data through the real train equalization module and the simulation platform of the train equalization module, and can improve the accuracy of the fault diagnosis model of the relay valve obtained through training.

Description

technical field [0001] The invention belongs to the technical field of fault diagnosis of a train braking system, and in particular relates to a relay valve fault diagnosis method and device. Background technique [0002] As an important guarantee for the safety of train operation, the electro-pneumatic braking system’s own performance and working status are particularly important. Any potential safety hazard or failure may cause significant loss of life and property. Troubleshooting is especially important. The fault detection of my country's railway train braking system mainly relies on manual detection. At present, the detection of faults is often found after the fault occurs, and the fault cannot be detected in advance before the fault occurs, which seriously affects the transportation efficiency of the railway and the train. safety. [0003] Pneumatic valve failures usually do not occur suddenly. Pneumatic valves are affected by the external environment and the fatigue...

AI Technical Summary

Problems solved by technology

Pneumatic valves are very complex, and the internal parts of the pneumatic valve cannot be directly observed. The method of disassembling the valve body to observe the internal parts and then assembling for experiments not only wastes a lot of time and energy, but also has a huge impact on the function of the valve after repeated disassembly , so the functional state of the internal parts cannot be confirmed by experimental observations

At the same time, due to the long stroke of the valve core and the slow movement speed of the valve core, the aging test of the pneumatic valve takes a lot of time in a laboratory environment. In addition, artificially injecting ideal fault types into the relay valve with a complex structure exists. greater difficulty

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