Intermittent Creep Overrun Detection and Separation Method of EMU Wheelset
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: 2021-08-17
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 info...
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The invention discloses a method for detecting and separating intermittent creep overrun of a train set wheel set based on weighted sliding average technology, and relates to the technical field of train fault diagnosis. The method includes: collection and preprocessing of training data, calculation of weight vectors and control limits in different modes of each wheel set, calculation of real-time detection and separation indicators in different modes of each wheel set, online detection and separation of intermittent creep overruns of wheel sets. The invention effectively guarantees the actual application requirements of the intermittent creep overrun detection and separation of the wheels of the EMU. When some wheel sets of the EMU are idling or sliding, the method can judge whether there is a wheel set creeping overrun in a car, and at the same time distinguish whether the creeping overrun is caused by idling or coasting, and determine the four Which pair or pairs of the wheel set have creep overrun. This method only uses the speed sensor measurement, which improves the detection and separation ability of the wheel set intermittent creep overrun.
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...
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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