A health assessment system and method for a balanced air cylinder braking device

Abstract

The invention discloses an equalizing reservoir brake device health evaluation system and method. The system comprises a current sensor, a pressure sensor and a data processing module. A plurality ofequalizing reservoir brake devices of normal and known fault types are sequentially connected into the system, and multiple tests are performed and test data is recorded separately according to the following steps that equalizing reservoir target pressure is set by the data processing module and sent to an electronic brake control unit; the electronic brake control unit outputs corresponding control signals to an air pressure valve and an air exhaust valve to control equalizing reservoirs to perform air charging or air exhausting based on the equalizing reservoir target pressure and the measured pressure, and records data collected by each sensor in the test process to extract characteristic data and train a health evaluation model; and the equalizing reservoir brake devices to be tested are connected into the health evaluation system for testing, the characteristic data in the test process is obtained, the trained health evaluation model is input, and a health evaluation result is obtained. The equalizing reservoir brake device health evaluation system and method can accurately evaluate the health status of the equalizing reservoir brake device.

Description

technical field [0001] The invention relates to a health evaluation system and method for a balanced air cylinder braking device. Background technique [0002] As a key subsystem in the train braking system, the balanced air cylinder brake device directly affects the performance of the train brake. Because the existing train fault diagnosis system depends on the expert system and a lot of experience to a large extent, and the diagnosis method is single, and the single variable monitoring is used, so it is greatly limited. The existing diagnostic system cannot predict the early failure of the balanced air cylinder brake device, but if the early failure is not dealt with, the failure will gradually worsen as time goes by, and unpredictable losses will occur at a later time. The balanced air cylinder braking device on the existing train comprises an air source system, an equalized air cylinder, an electronic brake control unit (EBCU), an air filling valve, an exhaust valve, a ...

AI Technical Summary

Problems solved by technology

The existing early failure detection method of the balanced air cylinder braking device has the following defects: (1) The solenoid valve is an easily damaged device as the actuator of the balanced air cylinder braking device, but the existing method is difficult to realize the monitoring of the state of the solenoid valve , because the conduction time of the high-speed solenoid valve is generally about 10ms, its signal is difficult to collect in the balanced air cylinder braking device on the existing train; (2) The pressure sensor is used as the acquisition device for the balanced air cylinder pressure , common failures include bias and drift. The existing train diagnosis system uses univariate monitoring. When the sensor fails, its monitoring index will be greater than its set threshold. Low; (3) Pipeline leakage is heavily dependent on empirical data and hardware redundancy

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