基于混合动力挖掘机的能量管理策略研究

Research on Energy Management Strategy Based on Hybrid Power Excavator

摘要: 为提高混合动力挖掘机的节能效果，需要使发动机保持在最佳燃油点工作，因此提出了一种基于动态规划算法的控制策略。根据已知的挖掘机工作循环，利用动态规划算法，通过调节发动机的转速以及作用在发动机上的扭矩，使发动机保持在最佳燃油点工作。并以此得到挖掘机在给定工作循环时的最优控制变量轨迹。仿真结果表明，所使用的控制策略在不降低工作性能的情况下油耗降低了31.2%，显著提高了挖掘机的节能效果。

Abstract: To improve the energy efficiency of hybrid power excavator, it is necessary to keep the engine op-erating at the optimum fuel point, so a control strategy based on a dynamic planning algorithm is proposed. Based on the known work cycle of the excavator, the dynamic planning algorithm is used to keep the engine working at the optimal fuel point by adjusting the engine speed and the torque acting on the engine. This is used to obtain the optimal control variable trajectory of the excavator for a given work cycle. The simulation results show that the control strategy used reduces the fuel consumption by 31.2% without reducing the working performance, which significantly improves the energy efficiency of the excavator.