The invention discloses a variable time domain model prediction energy management method for a plug-in hybrid electric vehicle, which belongs to the field of plug-in hybrid electric vehicle energy management. The method comprises the following steps of constructing a fuzzy logic controller, determining a track of a battery state of charge reference SOCr, solving a local optimal solution in the determined prediction time domain length Np by using a model prediction control method and taking fuel consumption as an optimization target, and updating a vehicle state, obtaining a predicted time domain increment deltaNp through a fuzzy logic controller according to the deviation deltaSOC between the actual power battery state of charge SOC and the battery state of charge reference SOCr and the model prediction control single-step calculation time Tc, superposing the predicted time domain increment deltaNp with the initial predicted time domain Npinitial, and updating the predicted time domainlength Np. By adopting the method, the problem that the traditional MPC adopting a fixed predicted time domain is difficult to adapt to the working condition change can be effectively solved, the control effect of an energy management strategy is effectively improved, and the fuel economy of the vehicle is further improved.
本发明公开了一种插电混合动力汽车变时域模型预测能量管理方法,属于插电式混合动力汽车能量管理领域,所述方法包括以下步骤:构建模糊逻辑控制器;确定电池荷电状态参考SOCr的轨迹;运用模型预测控制方法,以燃油消耗为优化目标,在所确定的预测时域长度Np内求取局部最优解,并对车辆状态进行更新;根据实际动力电池荷电状态SOC与电池荷电状态参考SOCr的偏差ΔSOC以及模型预测控制单步计算时间Tc通过模糊逻辑控制器得到预测时域增量ΔNp,与初始预测时域Npinitial叠加,对预测时域长度Np进行更新;采用本发明,可以有效解决采用固定预测时域的传统MPC难以适应工况变化的问题,有效提高能量管理策略的控制效果,进一步提高车辆的燃油经济性。
Variable time domain model prediction energy management method for plug-in hybrid electric vehicle
插电混合动力汽车变时域模型预测能量管理方法
2020-10-02
Patent
Elektronische Ressource
Chinesisch
IPC: | B60W CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION , Gemeinsame Steuerung oder Regelung von Fahrzeug-Unteraggregaten verschiedenen Typs oder verschiedener Funktion |
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