摘要
为分析汽车主动差速器的驱动力矩横向转移特性及车辆动力性能损失情况,考虑非线性轮胎模型及驱动桥中各部件转动惯量对其产生的影响,建立能够反映其动力学响应和运动学特性的主动差速器状态空间模型,并在MATLAB/Simulink环境下对坡道直线加速行驶工况下的车辆主动差速器主要性能进行仿真研究。仿真结果表明:主动差速器能够在车辆加速行驶工况下通过左、右车轮之间的驱动力矩横向转移产生直接横摆力矩,在提高车辆操纵稳定性的同时降低对车辆动力性能的影响。
In order to analyze the lateral torque transferring of an active differential and its influence on the per formance of vehicle drivability, a state space model of active differential, which includes the nonlinear tire model and all the inertias of driving axle, is developed to reflect its dynamic responses and kinematic characteristics. Sim ulation experiments of the active differential are carried out on a virtual straight slope test road to validate the model and performance of active differential by using MATLAB/Simulink. The simulation results demonstrate that the ac tive differential generates direct yaw moment by lateral torque transferring between left and right tires when the vehi cle accelerates on a virtual straight slope road, and this device contributes to stability performance improvement at the cost of small drivability decline.
出处
《机械科学与技术》
CSCD
北大核心
2014年第1期117-121,共5页
Mechanical Science and Technology for Aerospace Engineering
基金
国家自然科学基金项目(51275541)
国家自然科学基金青年基金项目(61304189)
中央高校基本科研业务费(XDJK2010c26)
西南大学科研基金项目(SWU110040)资助
关键词
主动差速器
动力学响应
横摆力矩
转矩传递
动力性能
automobiles
computer simulation
dynamic response
kinematics
stability
active differential
yawmoment
torque transferring
drivability
