基于MPC的液压混合动力车辆能量管理策略研究

摘要

Based on the model predictive control (MPC) theory, design the MPC controller for biaxial parallel hydraulic hybrid vehicles (PHHV). Its inputs are the accumulator charge state SOC and instantaneous engine fuel mass flow rate g mf , output is the engine power demand proportionφ, the objective function is the minimum fuel consumption. Based on the MATLAB/Simulink platform, establish PHHV backward simulation model including calculation model of power demand, transmission model, engine model, accumulator and hydraulic pump/motor model etc. The simulation results show that: PHHV can fully exert the characteristics of the hybrid based on MPC, distribute the demand power of ICE and hydraulic unit, reduce total fuel consumption in the UDDS driving cycle process.%针对双轴并联式液压混合动力车辆（PHHV），以蓄能器荷电状态(SOC)和发动机瞬时燃油质量流量为输入量，发动机需求功率比例φ为输出量，以油耗最小为目标函数设计了模型预测控制器（MPC）进行PHHV的能量管理。基于MATLAB/Simulink平台搭建了包括需求功率计算、发动机、蓄能器和泵/马达等主要部件的PHHV车辆模型并进行MPC能量管理。研究结果表明，在美国道路城市循环工况（UDDS）下， MPC管理下的PHHV能充分发挥混合动力的特点，合理调节分配发动机和液压单元的需求功率，降低行驶过程的总油耗。mf g