基于二次型性能指标的混合动力汽车实时优化控制  

Real-time optimization control for hybrid electric vehicles based on quadratic performance index

作　　者：夏超英[1] 张聪[1] 

机构地区：[1]天津大学电气与自动化工程学院,天津300072

出　　处：《控制理论与应用》2014年第5期601-606,共6页Control Theory & Applications

摘　　要：为解决混合动力系统实时优化控制问题,本文提出了一种基于二次型性能指标最优的混合动力汽车功率分配优化方案.通过合理的假设和近似,建立了混合动力系统的线性模型,并利用二次型最优控制理论将混合动力最优控制问题转化为二次型最优调节问题进行求解,得到了一个结构简单的实时优化控制算法.5种道路工况下的仿真结果表明,本文提出的控制方法在未来道路工况未知的情况下能够实现混合动力系统的实时优化控制,且节油率与离线计算以燃油消耗最小为性能指标的全局最优控制的节油率相近.In order to solve the real-time optimization control problem for hybrid electric vehicles （HEVs）, this paper proposes an optimal power split scheme based on the quadratic performance index optimization. Under several assumptions and approximations, a linear model of HEV is established. The control problem of HEVs is transformed to a quadratic optimal regulating problem, from which a real-time optimization control with simple construction is obtained. Simulation results under five driving cycles show that the proposed real-time method can achieve the optimization control for HEVs with the future driving conditions unknown. Furthermore, the fuel economy of this real-time method is found to be very close to that of the global optimal control calculated off-line aiming to minimize fuel consumption.

关 键 词：二次型最优控制 实时控制 混合动力汽车 

分 类 号：U469.7[机械工程—车辆工程]