基于改进BP算法的混合动力系统分析

Analysis of Hybrid Power System Based on Improved BP Algorithm

为了节能减排并提高运行效率,设计了一套重型机械车辆用混合动力传动系统。建立了发动机、电机和电池的数学模型,并提出了一种基于改进BP算法的整体优化控制策略。在Amesim平台中建立了混合动力系统的一维机-液耦合仿真模型。仿真结果表明,改进的BP算法不但提高了收敛速度,使系统工作时发动机和电池的工作点更靠近高效区。试验结果表明混合动力系统较原系统燃油消耗率降低了18.5%,输出转矩提高了22%,重型机械车辆的动态和经济性能得到了较大提高。

In order to save energy and reduce operating efficiency,a hybrid powertrain system for heavy machinery vehicles was designed.The mathematical model of engine,motor and battery is established,and an overall optimization control strategy based on improved BP algorithm is proposed.A one-dimensional machine-liquid coupling simulation model of the hybrid system was established in the Amesim platform.The simulation results show that the improved BP algorithm not only improves the convergence speed,but also makes the working point of the engine and battery closer to the high efficiency area when the system works.The test results show that the hybrid system has a 18.5%lower fuel consumption rate and a 22%increase in output torque.The dynamic and economic performance of heavy machinery vehicles has been greatly improved.