华中科技大学学报（自然科学版）2025，Vol.53Issue(12)：59-66,8.DOI:10.13245/j.hust.251208
电驱动传动系统非线性动力学特性
Nonlinear dynamics characteristics of electric drive transmission system
摘要
Abstract
To study the nonlinear dynamic characteristics of the electric drive transmission system of new energy vehicles at different motor speeds and determine the appropriate working range,considering the electromechanical coupling between permanent magnet synchronous motor(PMSM)and transmission system,gear force and its time-varying meshing stiffness,bearing time-varying load and its clearance,tooth side clearance,transmission error and other factors,the lumped mass method was used to establish the nonlinear dynamic model of electric drive transmission system.The Runge-Kutta method was used to solve the vibration differential equation of the system,and the bifurcation diagram,time domain diagram,phase diagram,Poincaré section,spectrum diagram and wavelet time frequency diagram of the gear pairs at all levels of the system were obtained.The influence of the external excitation frequency on the nonlinear dynamic characteristics of the transmission system at all levels was explored.Results show that the electric drive transmission system has obvious nonlinear characteristics at different speeds,and selecting the appropriate speed range can effectively avoid the unstable branches of the system and reduce the vibration of the system.关键词
电驱动系统/非线性动力学/机电耦合/新能源汽车/分岔与混沌Key words
electric drive system/nonlinear dynamics/electromechanical coupling/new energy vehicles/bifurcation and chaos分类
机械制造引用本文复制引用
MO Shuai,CHEN Zeyu,YAO Bowei,ZHOU Dakun..电驱动传动系统非线性动力学特性[J].华中科技大学学报（自然科学版）,2025,53(12):59-66,8.基金项目
广西杰出青年科学基金资助项目(2025GXNSFFA069016) （2025GXNSFFA069016）
广西科技重大专项资助项目(桂科AA24263074,桂科AA23073019) （桂科AA24263074,桂科AA23073019）
国家自然科学基金资助项目(52265004) （52265004）
中国航发科技创新平台资助项目(CXPT-2023-044) （CXPT-2023-044）
华中科技大学智能制造装备与技术全国重点实验室开放课题资助项目(IMETKF2025021). （IMETKF2025021）
