Automobile transmission system test field association method and system, storage medium and equipment

Abstract

The invention provides an automobile transmission system test field association method, which comprises the following steps of analyzing a target program working condition, and selecting an association test field working condition according to the target program working condition; using left and right half shaft torques under different gears, three-way accelerations of two front wheel steering knuckles and three-way accelerations of a transmission shell as associated channels; acquiring signals of all channels through test field road spectrum acquisition, and constructing an incidence matrixthrough data processing; converting the associated equation into an optimization function for optimization solution to obtain the number of working conditions of the associated test field; solving theoptimization function to obtain the cycle index of each working condition of the associated test field; and verifying the correlation result through relative damage comparison, and determining the durability specification of the power transmission system of the correlation test field. According to the method, the association channels are reasonably selected, and the logarithm processing method ofeach channel is adopted, so that the test field association of the automobile power transmission system is realized.

Description

technical field [0001] The invention belongs to the field of automobile durability development, and in particular relates to a test field correlation method of an automobile transmission system. Background technique [0002] The automobile transmission system is one of the four major systems of the automobile chassis, and it is also a key component for the automobile to realize its motion function. The durability performance of the automobile transmission system not only affects the service life and user evaluation of the automobile, but also directly affects the driving safety of the driver and passengers. Therefore, some automobile manufacturers have formulated special proving ground test specifications for the durability performance assessment of the transmission system. [0003] Due to reasons such as geographic location, differences in testing ground charging standards, and testing ground capacity, some automakers need to formulate durability specifications for transmi...

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Problems solved by technology

[0005] 1. In the paper "A New Method for Automobile Power Transmission System Proving Ground Correlation", Li Shengchao et al. achieved proving ground correlation by benchmarking various parameters of the power transmission system (vehicle speed distribution, gear use time, engine speed, etc.). Quantitative analysis and benchmarking of the macro parameters of the power transmission system were carried out, and no qualitative analysis was carried out on the correlation of the power transmission system test field from the perspective of fatigue

[0006] 2. In the paper "New Method for Reliability Test of User-Related Automobile Power Transmission System" and the patent "A Method for Acceleration and Strengthening Test of Commercial Vehicle Power Transmission System" (CN 103575531 A), Men Yuzhuo et al. output energy through the work of the power transmission system Correlation between test site users is equivalent. This method focuses on the correlation equivalent of torque output of the power transmission system, but does not consider the influence of component material properties on fatigue damage, nor does it take into account the impact of engine vibration and road impact on the durability of the vehicle transmission system. performance impact

If there is a large difference in the value of the damage value of each channel in the correlation calculation (especially if there is an order of magnitude difference), the influence of the numerical difference on the orientation of the solution result cannot be solved by normalization and weighting, that is, the solution result is not necessarily " Optimal solution"

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