Motor train unit wheel set intermittent creep overrun detection and separation method
A separation method and EMU technology, applied in railway vehicle testing, railway car body parts, railway signal and safety, etc., can solve practical application difficulties, change the original structure of the system and other problems, and achieve the effect of improving the detection and separation ability
Active Publication Date: 2020-06-12
SHANDONG UNIV OF SCI & TECH
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Problems solved by technology
Although the introduction of additional sensors such as GPS, Doppler radar, or additional measurement information such as motor current, voltage, etc., can improve the detection and separation capabilities of wheel set creep overrun, but it will inevitably change the original structure of the system and bring new benefits to practical applications. come difficult
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[0050] The specific embodiment of the present invention will be further described below in conjunction with accompanying drawing and specific embodiment:
[0051] combine figure 1 As shown in Fig. 1, a method for detection and separation of intermittent creep overrun of EMU wheel sets, including offline training and online monitoring and separation of intermittent creep overrun of wheel sets.
[0052] Offline training includes:
[0053] (1) Assume that the anti-skid and anti-idling system of the EMU uses the information of p speed sensors installed at the shaft ends, where the i-th speed sensor measures the speed of the i-th wheel set, and the sampling frequency of the speed sensors is the same; then continuously collect N normal Sample data under working conditions, and construct the normal working condition measurement matrix shown in formula (1)
[0054] [v 1 ,v 2 ,...,v N ]∈R p×N (1)
[0055] where v k ∈R p×1 is a column vector, representing the measurement infor...
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The invention discloses a motor train unit wheel set intermittent creep overrun detection and separation method based on the weighted moving average technology, and relates to the technical field of motor train fault diagnosis. The method comprises the steps of training data collection and preprocessing, weight vector and control limit calculation of each wheel set in different modes, real-time detection and separation index calculation of each wheel set in different modes, and wheel set intermittent creep overrun online detection and separation. According to the method, the actual applicationrequirements of motor train unit wheel set intermittent creep overrun detection and separation are effectively met. When some wheel sets of the motor train unit idle or slide, the method can judge whether creep overrun happens to the wheel sets in a certain carriage or not, distinguish whether the creep overrun is caused by idling or sliding at the same time, and determine which pair or several pairs of the four wheel sets in the carriage generate the creep overrun. According to the method, only the speed sensor is used for measurement, and the detection and separation capacity of the motor train unit wheel set intermittent creep overrun is improved.
Description
technical field [0001] The invention relates to the technical field of motor vehicle fault diagnosis, in particular to a method for detection and separation of intermittent creep overrun of a wheel set of a motor train based on weighted sliding average technology. Background technique [0002] Today, EMUs have become an indispensable and important part of public transportation systems due to their superior traction and braking performance. The traction and braking of an EMU depends largely on the adhesion between the wheel set and the rail. Modern studies have shown that when the train load and the surface conditions of the wheel and rail are constant, the creep speed (that is, the relative speed between the wheel and rail) is the main factor affecting the adhesion. Therefore, the creep speed should be controlled within a certain range in order to produce higher adhesion. Conversely, excessive wheel set creep, that is, idling or coasting, will reduce the overall traction a...
Claims
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Login to View More IPC IPC(8): B61L27/00G01M17/08
CPCG01M17/08B61L27/60
Inventor 周东华赵英弘何潇高明徐晓滨纪洪泉
Owner SHANDONG UNIV OF SCI & TECH