A comfort evaluation method based on torsional vibration of vehicle transmission system

Abstract

The present invention discloses a comfort evaluation method based on the torsional vibration of a vehicle transmission system, comprising the following steps: 1. collecting the torsional vibration signal of the vehicle transmission system and calculating objective evaluation parameters; 2. dividing the test operating conditions into steady-state conditions and transient conditions based on the peak factor, and using different weighting methods according to the operating condition type to obtain the torsional vibration excitation intensity of the transmission system as an objective evaluation result; 3. using a graded scoring method to subjectively evaluate the torsional vibration of the test vehicle transmission system under the operating condition, and obtaining a corresponding subjective torsional vibration score; 4. fitting the torsional vibration excitation intensity and the subjective score based on the power function law to preliminarily establish a subjective and objective quantitative model of torsional vibration. For models that do not meet the goodness of fit requirements, a revised subjective and objective quantitative model is established based on the revised power function law. The present invention clarifies the quantitative relationship between the subjective and objective evaluation results of torsional vibration, providing a reference for the decomposition and formulation of NVH targets in vehicle transmission system development.

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