Torsional vibration optimization method for planetary series-parallel hybrid power system

Abstract

The invention discloses a torsional vibration optimization method for a planetary series-parallel hybrid power system, and aims to solve the problem of complex torsional vibration of a planetary series-parallel hybrid passenger car caused by increase of a power source and change of a working mode and a working mode of a planetary gear mechanism. The method comprises: establishing a centralized mass model of a transmission component through the D'alembert principle and the Lagrangian equation, a matrix equation of the whole vehicle is further determined, and the modal shape of each mode is determined based on the inherent frequency; utilizing a modal participation factor theory to research the main participation modal of forced vibration of the component; based on parameter sensitivity analysis, determining an influence rule of parameter change on the inherent frequency and the resonance peak value. With the optimization of the inherent frequency of the transmission system and the reduction of a resonance peak value as evaluation criteria, the torsional vibration optimization design of the transmission system is realized. The complex torsional vibration analysis optimization methodfor the planetary series-parallel type passenger car structure is systematically provided, and a powerful theoretical basis is provided for researching complex torsional vibration characteristics of the planetary series-parallel type passenger car.

Description

technical field [0001] The invention relates to a method for optimizing torsional vibration of a vehicle, more precisely, the invention relates to a method for optimizing torsional vibration of a planetary hybrid system. Background technique [0002] The torsional vibration problem of automobile drive train has always been an important factor affecting the comfort, safety and economy of automobiles. As an important part of new energy buses, hybrid buses have an increasing market share, and the torsional vibration problem of hybrid bus drive trains has also attracted more and more attention from domestic and foreign researchers. The configuration of the transmission system of a hybrid electric vehicle is complex, including not only the shafting, clutch and transmission of a traditional vehicle, but also complex planetary gear trains and other structures; in addition, the power source has also changed from the original engine to the engine and The combination of multiple powe...

AI Technical Summary

Problems solved by technology

[0005] To sum up, the number of existing patents on the torsional vibration analysis and optimization of hybrid electric buses is relatively small. At the same time, the existing technology uses a simplified vehicle model for the torsional vibration analysis of hybrid electric buses, and the simulation results are often far from the actual results. Large, ...

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