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Calculation method of the least collected mileage of the user's road when the user is associated with the test site

A calculation method and test field technology, applied in surveying and mapping and navigation, time register, complex mathematical operations, etc., can solve problems such as lack of theoretical support, resource consumption, etc., to improve representativeness, improve accuracy, and save computing time. Effect

Active Publication Date: 2020-12-08
CHINA AUTOMOTIVE ENG RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among the above methods, method (1) is too subjective and has no theoretical support; method (2) will consume a lot of resources in the collection of durability load spectrum

Method used

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  • Calculation method of the least collected mileage of the user's road when the user is associated with the test site
  • Calculation method of the least collected mileage of the user's road when the user is associated with the test site
  • Calculation method of the least collected mileage of the user's road when the user is associated with the test site

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] When the user is associated with the test site, the calculation method of the least collected mileage of the user's road, such as figure 1 shown, including the following steps:

[0043] S100, collecting the durability load spectrum of the user's road, taking the vertical acceleration signal of the shaft head as the analysis object, obtaining the pseudo damage density of the vertical acceleration signal of the four shaft heads, and obtaining the pseudo damage density of the shaft head force signal and the displacement signal;

[0044] S200, when the cumulative driving mileage of the vehicle reaches the target mileage, the target mileage is the mileage when the vehicle component has a fault, and verify whether the logarithmic pseudo-damage of the vehicle structure or component load spectrum obeys the normal distribution, namely: ln(D)~N( μ,σ 2 ), when the cumulative mileage of the vehicle reaches the target mileage, the logarithmic pseudo-damage of the vehicle structure ...

Embodiment 2

[0062] The difference from Embodiment 1 is that in step S100, the durability load spectrum is collected through the three-way acceleration sensor, the displacement sensor and the strain sensor, the three-way acceleration sensor can be the acceleration sensor of the existing 8396A model, and the displacement sensor can be the sensor of the ZLDS100 model The strain sensor can use T-type strain rosettes, and the six-component force sensor at the wheel end can collect the durability load spectrum of the parts to calculate the minimum acquisition mileage. The six-component force sensor at the wheel end can use the LW-2T-300K sensor. Highways, national roads, mountain roads, urban roads and country roads.

[0063] In the second embodiment, the minimum acquisition mileage is obtained by calculating the collection of different road pavement information, which can completely cover the types of user roads, so as to accurately obtain a representative load spectrum under the user's target ...

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Abstract

The invention relates to the technical field of vehicle durability tests, in particular to a method for computing minimum collection mileage of a user road when a user is associated with a test field.The method comprises the following steps of collecting a durability load spectrum of the user road; determining an analysis object, and obtaining a pseudo-damage density; carrying out normality teston the load spectrum of the analysis object by using a non-parametric test method; sampling from the pseudo-damage density under target mileage which totally obeys normal distribution based on a theory of probability statistics in order to obtain a sampling distribution with a mean value and a variance; defining a relative deviation of the mean value of a sample and an overall mean value; specifying degree of confidence of the collected sample; obtaining a minimum size sample computational formula; and finally, determining the minimum collection mileage. According to the method, the collecteddata size is prevented from being too large, and meanwhile, the accuracy and the representativeness of the vehicle damage information obtained by the durability test are improved.

Description

technical field [0001] The invention relates to the technical field of vehicle durability tests, and in particular to a method for calculating the minimum collected mileage of a user's road when the user is associated with a test field. Background technique [0002] During the durability test of the vehicle, the durability problem of the vehicle during the target mileage period can be reproduced in a relatively short period of time through the intensive test of the vehicle proving ground. However, depending on the user's working conditions and driving behavior, the reinforcement methods on the road surface of the proving ground are different. In order to match the durability performance of the vehicle in the proving ground intensive test with the user’s working conditions, it is necessary to correlate the proving ground with the user’s working conditions. The injuries produced by the test were consistent. [0003] To associate user working conditions, it is necessary to co...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G07C5/08G07C5/12G06F17/18G01C22/00
CPCG01C22/00G06F17/18G07C5/0841G07C5/12
Inventor 郑国峰肖攀曾敬林鑫马媛媛
Owner CHINA AUTOMOTIVE ENG RES INST
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