Whole vehicle transmission path analysis test method based on network diagnosis algorithm

Abstract

The invention relates to a whole vehicle transmission path analysis test method based on a network diagnosis algorithm. The method comprises the steps of carrying out noise source power test and calculation based on a power substitution method; testing a noise direct transfer function; testing a noise composite transfer function; measuring the reverberation time in a vehicle; and on the basis of the test result, carrying out the whole vehicle transmission path data analysis of the network diagnosis algorithm. According to the method, the contribution levels of various noise sources of the whole vehicle can be scientifically and effectively analyzed, the contribution amounts are sorted, and the noise sources, such as engines, transmissions, intake and exhaust, tires, etc., are optimized ina targeted manner. According to the method, the acoustic package transmission paths of the whole vehicle can be accurately analyzed, the transmission paths are sorted, the weak transmission paths areoptimized in the targeted manner, the research and development cost is saved, and the research and development efficiency is improved. According to the present invention, the air sound and structuralsound of the vehicle can be accurately separated, and the direction is pointed out for the development of the acoustic performance of the whole vehicle. According to the method, the noise characteristics of the vehicle can be accurately analyzed, and guiding significance is provided for the vehicle platformization development.

Description

Technical field [0001] The invention relates to the field of automobile noise analysis, in particular to a vehicle transmission path analysis and test method based on a network diagnosis algorithm. Background technique [0002] The internal sound pressure level is the sum of the sound pressure levels of all noise sources in the vehicle. The noise sources of automobiles mainly include engine, transmission, tire noise, exhaust pipes, air intakes, etc. These noises are finally transmitted into the passenger compartment through different transmission paths. Vibration and noise in the vehicle can be regarded as the superposition of multiple excitations to the target point through multiple transmission paths. If the contribution of each main excitation source and transmission path can be accurately judged, and for the excitation source with large contribution With the corresponding optimization and improvement of the transmission path, the improvement of NVH (ie, Noise, Vibration, and...

AI Technical Summary

Problems solved by technology

For air noise, the traditional TPA analysis method cannot purify the noise source and transmission path of the vehicle, and cannot propose an optimization plan in a targeted manner

The traditional TPA analysis method has the following problems: it cannot accurately purify and analyze the contribution of the noise source

Accurate cleanup and weak point analysis of acoustic transfer paths

Cannot effectively separate air sound and structure sound

Unable to identify the acoustic characteristics of the vehicle, and unable to guide platform development

Unable to calculate the transmission loss at the subsystem level of the whole vehicle

Cannot provide data support for SEA development