为实现功率分流式混合动力汽车的实时最优控制,有效解决发动机最优燃油经济性与电池荷电状态(state of charge,SOC)合理范围的冲突,提出模型预测控制(model predictive control,MPC)策略,建立预测控制模型和目标函数,预测系统未来需求转...为实现功率分流式混合动力汽车的实时最优控制,有效解决发动机最优燃油经济性与电池荷电状态(state of charge,SOC)合理范围的冲突,提出模型预测控制(model predictive control,MPC)策略,建立预测控制模型和目标函数,预测系统未来需求转矩,并根据预测结果调整发动机和电机转矩。以提高燃油经济性为主要目的,通过线性优化算法和约束最优控制问题实现对输入、输出变量的实时控制。MATLAB/Simulink仿真结果显示,模型预测的控制策略可实现发动机和电机转矩的合理分配,提高燃油经济性,具有更好的实时性和鲁棒性。展开更多
An accurate circuit of PWM/PFM mode converting and a circuit of auto-adaptively adjusting dimension of power transistor are described.The duty cycle of the signal when the control mode converts can be gained accuratel...An accurate circuit of PWM/PFM mode converting and a circuit of auto-adaptively adjusting dimension of power transistor are described.The duty cycle of the signal when the control mode converts can be gained accurately by using ratios of currents and capacitances,and an optimal dimension of power transistor is derived with different loads.The converter is designed by 0.35μm standard CMOS technology.Simulation results indicate that the converter starts work at 0.8 V input voltage.Combined with synchronized rectification,the transfer efficiency is higher than 90%with full load range,and achieves 97.5%at rating output.展开更多
文摘为实现功率分流式混合动力汽车的实时最优控制,有效解决发动机最优燃油经济性与电池荷电状态(state of charge,SOC)合理范围的冲突,提出模型预测控制(model predictive control,MPC)策略,建立预测控制模型和目标函数,预测系统未来需求转矩,并根据预测结果调整发动机和电机转矩。以提高燃油经济性为主要目的,通过线性优化算法和约束最优控制问题实现对输入、输出变量的实时控制。MATLAB/Simulink仿真结果显示,模型预测的控制策略可实现发动机和电机转矩的合理分配,提高燃油经济性,具有更好的实时性和鲁棒性。
基金Supported by National Youth Science Foundation of China(No.60806010)
文摘An accurate circuit of PWM/PFM mode converting and a circuit of auto-adaptively adjusting dimension of power transistor are described.The duty cycle of the signal when the control mode converts can be gained accurately by using ratios of currents and capacitances,and an optimal dimension of power transistor is derived with different loads.The converter is designed by 0.35μm standard CMOS technology.Simulation results indicate that the converter starts work at 0.8 V input voltage.Combined with synchronized rectification,the transfer efficiency is higher than 90%with full load range,and achieves 97.5%at rating output.
