Rail vehicle transversal dynamic performance on-ground monitoring and assessing method
A technology of dynamics and dynamic characteristics, applied in the direction of railway vehicle testing, etc., can solve problems such as limitations, limited promotion, and inability to provide vehicle monitoring values, and achieve the effects of stable evaluation results and improved timeliness.
Active Publication Date: 2009-08-19
CHINA ACADEMY OF RAILWAY SCI CORP LTD +1
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Problems solved by technology
However, the ground monitoring of rail vehicle lateral dynamics can only provide the monitoring value within a few meters when the vehicle passes the monitoring equipment, and cannot provide the monitoring value of the vehicle under all normal lines, so its monitoring has certain limitations
[0005] At present, there is no clear correspondence between the standard dynamic test and the ground monitoring results of rail vehicle lateral dynamics, which limits the deepening of rail vehicle lateral dynamics ground monitoring in the application of truck safety monitoring, and limits the application of this technology in medium and high speeds. Promotion in Passenger Car Safety Monitoring
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[0046] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.
[0047] Theoretical basis of the present invention is:
[0048] Let x, y, θ be the attributes of things, known p(x|θ), p(y|θ), p(θ), and let Xc be n independent measurements Xc=[x1, x2,...,xn], if the distribution of x and y is determined by θ and p(x|θ) and p(y|θ) are smooth, then the distribution estimation of y under the measurement sequence Xc of x (the following p represents the corresponding Estimated value of the probability density function):
[0049] p(y|...
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A ground monitoring and evaluating method for lateral dynamics performances of railway vehicles comprises the steps of obtaining basic data of a certain type of vehicles; generating a first conditional probability density function of standard lateral dynamics test data about lateral dynamics characteristic parameters of the type of the vehicles; generating a second conditional probability density function of ground monitoring data about the lateral dynamics characteristic parameters of the type of the vehicles; generating the probability density function of the lateral dynamics characteristic parameters of the type of the vehicles according to the second conditional probability density function and corresponding ground monitoring data; for any vehicle belonging to the type, combining the ground monitoring data sequence thereof with the second conditional probability density function and probability density function, and obtaining the lateral dynamics characteristic parameter distribution of the vehicle; and obtaining the standard lateral dynamics parameter distribution of the vehicle under speed stage evaluation by the lateral dynamics characteristic parameter distribution and the first conditional probability density function and carrying out evaluation according to the standard.
Description
technical field [0001] The invention relates to a ground monitoring and evaluation method for the lateral dynamic performance of rail vehicles. Background technique [0002] Vehicle operation safety assessment generally has two forms: standard dynamic test and ground monitoring. [0003] The standard dynamic test is to install the force measuring wheel set, add speedometer, displacement gauge and other sensors on the vehicle under test, test on the positive line, obtain the test value (also known as the true value), and compare the test value according to the standard (such as GB / T5599—1985 "Railway Vehicle Dynamic Performance Evaluation and Test Appraisal Specification") requires to evaluate the lateral dynamic performance of the vehicle; the measured characteristic values such as the maximum derailment coefficient, average value, variance, etc. reflect the lateral dynamic performance of the tested vehicle. dynamic characteristics. The standard dynamic test can obtain t...
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IPC IPC(8): G01M17/08
Inventor 曾宇清于卫东陈雷扈海军
Owner CHINA ACADEMY OF RAILWAY SCI CORP LTD