摘要
搭建了基于Matlab/Simulink和AMESim的整车动力学联合仿真平台,并精确建立了液力变矩器、闭锁离合器和扭转减震器的耦合动力传递模型。以液力变矩器泵轮、涡轮的转速差为滑差控制参数,设计了闭锁离合器滑差PID控制器。以遗传算法作为闭锁离合器滑差控制转速优化算法、闭锁离合器滑差控制转速为遗传算子、扭矩波动水平w和传动效率η为评价指标构建了适应度函数,优化起步工况下不同油门开度下闭锁离合器滑差控制转速。仿真结果表明:车辆在小油门开度起步时,由于发动机工作状态不太稳定,不宜进行滑差控制;车辆在中等油门、大油门以及全油门开度下起步时,由于闭锁离合器滑差控制的介入,主动干涉发动机的工作点,使发动机工作在最佳工作状态,实现了较理想的动力传递分配比例,极大地改善了车辆在低车速区域的动力传动效率。
A co-simulation model of whole-vehicle dynamics was established based on MATLAB/ Simulink and AMESim. Also a precise dynamics model of torque converter, locking clutch and torsional coupling power transmission was developed. The Proportional-Integral-Derivative （PID） controller of the lock-up clutch was designed using torque converter pump wheel and turbine speed as slip control parameters. The MATLAB Optimization Toolbox was used to optimize the slip speed based on the evaluation of the level of torque fluctuations and transmission efficiency. Simulation results show that, when the vehicle is started with small throttle, the lock-up and slip control should not be used due to unstable condition of the engine~ when the vehicle is started with medium throttle, large throttle and full throttle opening, the engine works in its best working condition because of the involvement of the lock-up clutch that actively intervenes the engine operating point. The slip and lock-up control of the lock-up clutch achieves a better allocation of power transmission and balances the relationship between the energy loss and NVH.
出处
《吉林大学学报（工学版）》
EI
CAS
CSCD
北大核心
2013年第6期1447-1452,共6页
Journal of Jilin University:Engineering and Technology Edition
基金
国家自然科学基金项目(51075182)
吉林大学'985'工程项目
新世纪优秀人才支持计划项目(NCET-08-0248)
长江学者和创新团队发展计划项目(IRT1017)
关键词
车辆工程
液力变矩器
起步工况
遗传算法
闭锁滑差
vehicle engineering
torque converter
launching condition
genetic algorithm
lock-up and slip
