A Method for Torsional Vibration Optimization of Planetary Hybrid Power System

Abstract

The invention discloses a torsional vibration optimization method for a planetary hybrid power system, which aims to solve the complex torsional vibration problem caused by the increase of power source, the change of the working mode and the working mode of the planetary gear mechanism of the planetary hybrid bus; the present invention The invention establishes the lumped mass model of transmission components through D'Alembert's principle and Lagrangian equation, further determines the matrix equation of the vehicle, and determines the mode shape of each mode based on the natural frequency; uses the theory of modal participation factors to study the forced The main participating modes of vibration; based on the parameter sensitivity analysis, determine the influence of parameter changes on the natural frequency and resonance peak; optimize the natural frequency of the transmission system and reduce the resonance peak as the evaluation standard, realize the optimal design of the torsional vibration of the transmission system; the present invention Systematically give the torsional vibration analysis and optimization method of the complex planetary hybrid bus structure, which provides a strong theoretical basis for the study of the complex torsional vibration characteristics of the planetary hybrid bus.

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, lack of quantitative analysis and calculation, and did not analyze the structure of different hybrid electric buses, the conclusions drawn are not representative and feasible, therefore, it is necessary to provide a complete and reliable planetary hybrid hybrid system Torsional vibration optimization method to make up for the deficiencies of existing technologies

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