Off-line electric drive assembly NVH (Noise Vibration and Harshness) evaluation system and evaluation method

Abstract

The invention discloses an off-line electric drive assembly NVH evaluation system, which comprises a data storage system, a driving simulation system and an acoustic image feedback system, and is characterized in that the data storage system comprises a rack test database used for importing off-line stored NVH rack test data; the driving simulation system comprises a driving control module and a driving simulation module, the driving control module comprises a brake pedal, an accelerator pedal and a steering wheel, and the driving simulation module is used for receiving a control signal of the driving control module, calculating a real-time rotating speed and a load and transmitting the real-time rotating speed and the load into the rack test database; the bench test database is also used for transmitting the corresponding NVH characteristic data to the sound image feedback system according to the received real-time rotating speed and load; the acoustic image feedback system comprises a real-time information display module and an acoustic output module. The NVH evaluation system and the evaluation method have the advantages that the NVH evaluation can be performed on the NVH rack test data stored offline, the research and development cost can be reduced, the research and development period can be shortened, and the like.

Description

technical field [0001] The invention relates to the technical field of vehicle NVH testing, in particular to an off-line electric drive assembly NVH evaluation system and evaluation method. Background technique [0002] In the process of testing the NVH characteristics of the electric drive assembly, the existing NVH test technology needs to connect the physical electric drive assembly to the test bench to evaluate the NVH performance of the electric drive assembly. At the same time, in the traditional NVH During the characteristic test, the test object is in a closed and sound-proof environment, and it is impossible to provide the tester with a driving scene, and the tester cannot immediately make a subjective evaluation of the NVH characteristics of the test object, and the brain has a short memory for sound, so it is difficult to simultaneously Multiple voices are compared for evaluation. Once different testers are required to perform NVH evaluation on the same electric ...

AI Technical Summary

Problems solved by technology

[0002] In the process of testing the NVH characteristics of the electric drive assembly, the existing NVH test technology needs to connect the physical electric drive assembly to the test bench to evaluate the NVH performance of the electric drive assembly. At the same time, in the traditional NVH During the characteristic test, the test object is in a closed and sound-proof environment, and it is impossible to provide the tester with a driving scene, and the tester cannot immediately make a subjective evaluation of the NVH characteristics of the test object, and the brain has a short memory for sound, so it is difficult to simultaneously Multiple voices for comparative evaluation

Once different testers are required to perform NVH evaluation on the same electric drive assembly in batches, the traditional NVH evaluation system needs to run the test object during each evaluation process, resulting in increased system debugging and operating costs

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