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Compilation method for reliability test load spectrum of electric drive assembly mechanical system

A mechanical system and reliability technology, applied in machine learning, electrical digital data processing, computer-aided design, etc., can solve problems such as difficult to effectively cover the service load strength of the mechanical system of the electric drive assembly

Active Publication Date: 2020-08-25
UNIV OF SHANGHAI FOR SCI & TECH
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  • Abstract
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AI Technical Summary

Problems solved by technology

The current reliability test specifications for traditional internal combustion engine vehicles are difficult to effectively cover the actual service load strength of the electric drive assembly mechanical system

Method used

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  • Compilation method for reliability test load spectrum of electric drive assembly mechanical system
  • Compilation method for reliability test load spectrum of electric drive assembly mechanical system
  • Compilation method for reliability test load spectrum of electric drive assembly mechanical system

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Embodiment Construction

[0067] In order to make the technical means and effects realized by the present invention easy to understand, the present invention will be described in detail below in conjunction with the embodiments and accompanying drawings.

[0068] figure 1 It is a schematic flowchart of a method for preparing a reliability test load spectrum of an electric drive assembly mechanical system in an embodiment of the present invention.

[0069] Such as figure 1 As shown, this embodiment provides a method for compiling the reliability test load spectrum of the mechanical system of the electric drive assembly, including the following steps:

[0070] Step 1. Based on the user load data collected on the actual user road, the user load data is preprocessed and the road condition segment is divided into a running segment and an idling segment.

[0071] In step 1, the user load data covers a large number of driving data of electric vehicles in different regions and models. For the abnormal data c...

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Abstract

The invention provides a compilation method for a reliability test load spectrum of an electric drive assembly mechanical system, and the method comprises the following steps: step 1, collecting userload data, carrying out preprocessing, and dividing road condition segments; step 2, determining five typical working conditions; step 3, selecting a reliability test cycle segment of each typical working condition; step 4, adopting Monte Carlo simulation to extrapolate damage targets of all parts in the full life cycle; step 5, calculating the number of cycles of each reliability test cycle segment covering multiple damage targets by using a multi-objective optimization method; step 6, splicing the reliability test cycle segments to obtain a reliability test cycle condition; and step 7, compiling to obtain a reliability test load spectrum according to the cycle index of the reliability test cycle segment and the reliability test cycle working condition. The load spectrum compiled by the method is associated with user load data and covers high damage strength, and reference and basis are provided for reliability design and verification of the electric drive assembly.

Description

technical field [0001] The invention belongs to the technical field of reliability analysis of electric vehicles, and in particular relates to a preparation method of a reliability test load spectrum of an electric drive assembly mechanical system. Background technique [0002] As the core component of vehicle electrification, the electric drive assembly is the only power system for various new energy vehicles such as pure electric vehicles and hydrogen fuel cells, providing power for the vehicle to move forward and recovering part of the braking energy. Compared with traditional vehicles, the power of electric vehicles has been greatly improved, and the increase in load intensity such as speed and torque has correspondingly increased the risk of failure of the electric drive assembly. In the automobile development system, multi-level reliability tests such as parts / assemblies / complete vehicles are the main way to verify and ensure product reliability and durability. The cu...

Claims

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Application Information

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IPC IPC(8): G06F30/27G06F30/15G06N20/00G06F119/02G06F119/04G06F119/08G06F119/14
CPCG06N20/00
Inventor 赵礼辉王震邓思城冯金芝郑松林高大威翁硕
Owner UNIV OF SHANGHAI FOR SCI & TECH
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