摘要
针对车辆动力传动系统模式切换过程中平稳性不足的问题,设计了一款油电混合-机液复合动力传动系统,将电机和发动机集成作为双动力源,通过机械-液压复合传动装置实现高效动力传递。研究从构型设计和动力传动模式分析入手,分别建立动力系统、传动系统、切换元件及整车动力传动系统的等效动力学模型,以电机低档切换至混合动力转矩耦合这一复杂过程为典型研究对象,建立物理模型,设计模糊比例、积分、微分(PID)控制器以调节电机转速,结合正交试验法优化切换元件的切换时序,实现电机与切换元件的复合控制。仿真结果表明:优化后的系统显著改善了模式切换的平稳性,输出轴的最大冲击度由11.4188m/s^(3)降低至8.1127m/s^(3),转矩波动系数由4.771减小至3.874,转速波动幅度由17.1186%降低至2.3500%,切换时间由1.5s缩短至0.7s。硬件在环(HIL)测试实验进一步验证了该控制策略在不同模式切换及复杂工况条件下均能表现出良好的适用性和稳定性。
To address the issue of insufficient smoothness during mode transitions in the power transmission system of vehicles,a hybrid power hydro-mechanical composite power transmission system was developed.This system integrates an electric motor and an engine as dual power sources and achieves efficient power delivery through a mechanical-hydraulic composite transmission mechanism.Starting from configuration design and power transmission mode analysis,equivalent dynamic models were established for the power system,transmission system,switching components,and the overall vehicle powertrain system.With the complex process of motor low-gear switching to hybrid torque coupling taken as a typical research scenario,a physical model was developed.A fuzzy PID controller was designed to regulate motor speed,and the switching sequence of the transmission components was optimized using an orthogonal experiment method,enabling composite control of the motor and switching components.Simulation results demonstrated that the optimized system significantly improved transition smoothness:The maximum impact on the output shaft was reduced from 11.4188m/s^(3) to 8.1127m/s^(3),the torque fluctuation coefficient decreased from 4.771 to 3.874,the speed fluctuation amplitude dropped from 17.1186%to 2.3500%,and the switching time was shortened from 1.5s to 0.7s.Hardware-in-the-loop(HIL)tests further validated the effectiveness of the control strategy,showing robust adaptability and stability under various mode transitions and working conditions.
作者
朱镇
张勤博
张宏伟
王德海
陈龙
ZHU Zhen;ZHANG Qinbo;ZHANG Hongwei;WANG Dehai;CHEN Long(Automotive Engineering Research Institute,Jiangsu University,Zhenjiang,Jiangsu 212013,China;National Key Laboratory of Special Vehicle Design and Manufacturing Integration Technology,Baotou,Inner Mongolia 014030,China;State Key Laboratory of Fluid Power and Mechatronic Systems,Zhejiang University,Hangzhou 310027,China;Department of Agricultural Engineering,Jiangsu University,Zhenjiang,Jiangsu 212013,China)
出处
《西安交通大学学报》
北大核心
2025年第6期185-197,共13页
Journal of Xi'an Jiaotong University
基金
国家自然科学基金资助项目(52272435)
特种车辆设计制造集成技术全国重点实验室开放课题资助项目(GZ2023KF007)。
关键词
动力传动系统
切换元件
模式切换
模糊PID控制
正交试验
power transmission system
switching element
mode switching
fuzzy PID control
orthogonal test
作者简介
朱镇(1985-),男,副教授,博士生导师。
