考虑网络时变时延的纯电动车传动系统扭振控制研究  

Torsional vibration control for a pure electric vehicle powertrain system with network-induced time-varying delays

作　　者：陈长征[1] 王悦[1] 王刚[1] 于慎波[1] 

机构地区：[1]沈阳工业大学机械工程学院,沈阳110870

出　　处：《振动与冲击》2017年第24期70-76,84,共8页Journal of Vibration and Shock

基　　金：国家自然科学基金(51175350);辽宁省科技创新重大专项(2015106023)

摘　　要：电机-变速器同轴直联传动系统具有小尺寸、高效率的特点,已经广泛应用于纯电动汽车当中。由于其本质上表现为一个欠阻尼系统,在起步加速、减速和能量回馈制动时具有明显的扭振和车身抖动现象,影响整车的行驶性能。针对该问题,提出了基于混合H_∞/GH_2算法的振荡衰减控制策略,并综合考虑了网络时延、电机转矩脉动及建模误差的影响。由于扭转角难以测量,采用静态输出反馈控制方式。区别于以往的迭代算法,应用一个新的单步法直接求解问题的可行解,极大地简化了设计过程。数值结果表明,在不失加速性的前提下,该方法能有效地抑制传动系统扭振和车身抖动。Integrated motor-transmission( IMT) powertrain systems are widely applied in pure electric vehicles due to their size reduction and efficiency improvement. Since they are essentially underdamped systems,significant torsional vibration and car-body acceleration surge are found during their acceleration, deceleration and regenerative brake processes. This oscillation problem has a significant impact on the driving performance of vehicles. Here,a oscillation attenuation control strategy based on the mixed H_∞/GH_2 algorithm was proposed to solve the torsional vibration problem of IMT powertrain systems. In the controller 's design,the effects of network time delays,motor torque pulsation and modeling errors were comprehensively considered. As the torsion angle was hard to measure,the static output-feedback controller was utilized. Being different from the traditional iterative linear matrix inequality( ILMI) method,the feasible solution was obtained by using the single-step LMI method,the design process was greatly simplified. Numerical results indicated that the new controller can effectively suppress the torsional vibration and car-body acceleration surge to ensure the acceleration performance of vehicles.

关 键 词：电动汽车 扭转振动 H∞/GH2控制 网络时延 静态输出反馈 

分 类 号：U469.72[机械工程—车辆工程]