基于电磁变速器的插电式混合动力汽车控制系统研究
发布时间：2019-04-30 14:31
【摘要】：随着能源短缺和环境污染问题日益凸显,新能源汽车成为了未来汽车的发展方向,其中,插电式混合动力汽车既能够大幅度降低燃油消耗和排放,同时还有较长的续航里程,在当前阶段具有独特的优势。无级变速器是混联式混合动力系统的关键单元,本文所研究的电磁变速器是一种无刷化的无级变速器,由于其特殊的结构和工作原理,以及混合动力系统的特殊应用背景,对其控制有了更高的要求,另外燃油经济性和低排放对混合动力系统能量管理有新的要求。本文首先分析了基于电磁变速器的混合动力系统的工作原理。采用图解的方法对电磁变速器的特性进行了分析,得出了不同速比下电磁变速器的工作状态和能量流动情况;对混合动力系统的工作原理进行了分析,确定了混合动力系统各端口功率关系;分析了混合动力系统的工作模式,为系统的控制和能量管理策略的制定提供依据。其次,研究了基于电磁变速器的混动力系统的控制策略。建立了电磁变速器系统的数学模型;为避免动力系统输出端转速和内燃机转速差较大时,电磁变速器失去转矩传递能力,提出了电磁变速器的弱磁控制方法,仿真结果表明,所提出的弱磁控制方法对电磁变速器有良好的控制效果;提出了电磁变速器系统的协调控制策略,并在多种运行模式下进行了仿真,仿真结果表明,所提出的控制策略对系统有良好的控制效果。再次,为了在满足汽车动力性能的同时,提高车辆的经济性,研究了能量管理策略。先介绍了模糊控制的基本理论,然后分析了能量管理的原理,接着设计了驱动模糊控制器和制动模糊控制器。最后,采用Cruise软件建立了混合动力汽车仿真模型,来验证能量管理策略,并分别在NEDC工况和UDDS工况下进行了仿真,仿真结果表明发动机运行于最佳效率曲线上,电池得到了优化控制;为了评估所提出的能量管理策略对汽车燃油经济性的作用,与Prius2012的测试结果进行了对比,对比表明与Prius2012的能耗非常接近,说明本文提出的能量管理策略性能良好。
[Abstract]:With the increasingly prominent problems of energy shortage and environmental pollution, new energy vehicles have become the development direction of future vehicles, in which plug-in hybrid vehicles can not only greatly reduce fuel consumption and emissions, but also have a long life mileage. It has a unique advantage at the current stage. The CVT is the key unit of the hybrid power system. The electromagnetic transmission studied in this paper is a kind of brushless CVT. Because of its special structure and working principle, and the special application background of the hybrid power system, the electromagnetic transmission studied in this paper is a kind of brushless CVT. There are higher requirements for its control and new requirements for energy management of hybrid power system with fuel economy and low emission. In this paper, the principle of hybrid power system based on electromagnetic transmission is analyzed. The characteristic of electromagnetic transmission is analyzed by graphic method, and the working state and energy flow of electromagnetic transmission with different speed ratio are obtained. The working principle of the hybrid power system is analyzed, and the power relationship between the ports of the hybrid power system is determined, and the working mode of the hybrid power system is analyzed, which provides the basis for the control of the system and the formulation of the energy management strategy. Secondly, the control strategy of hybrid power system based on electromagnetic transmission is studied. The mathematical model of electromagnetic transmission system is established. In order to avoid the loss of torque transfer ability of electromagnetic transmission when the power system output speed and internal combustion engine speed difference is large, the magnetic weakening control method of electromagnetic transmission is proposed. The simulation results show that: The proposed weak magnetic control method has a good control effect on electromagnetic transmission. The coordinated control strategy of electromagnetic transmission system is proposed and simulated under various operation modes. The simulation results show that the proposed control strategy has a good control effect on the system. Thirdly, the energy management strategy is studied in order to improve the vehicle economy while satisfying the vehicle dynamic performance. Firstly, the basic theory of fuzzy control is introduced, then the principle of energy management is analyzed, and then the driving fuzzy controller and braking fuzzy controller are designed. Finally, the hybrid electric vehicle simulation model is established with Cruise software to verify the energy management strategy. The simulation results show that the engine is running on the optimal efficiency curve under the NEDC and UDDS operating conditions, and the simulation results show that the engine is running on the optimal efficiency curve. The battery is optimized. In order to evaluate the effect of the proposed energy management strategy on automobile fuel economy, the comparison with the test results of Prius2012 shows that the energy consumption of the proposed energy management strategy is very close to the energy consumption of Prius2012, indicating that the performance of the energy management strategy proposed in this paper is good.
【学位授予单位】：哈尔滨工业大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：U469.7
，
本文编号：2468826
[Abstract]:With the increasingly prominent problems of energy shortage and environmental pollution, new energy vehicles have become the development direction of future vehicles, in which plug-in hybrid vehicles can not only greatly reduce fuel consumption and emissions, but also have a long life mileage. It has a unique advantage at the current stage. The CVT is the key unit of the hybrid power system. The electromagnetic transmission studied in this paper is a kind of brushless CVT. Because of its special structure and working principle, and the special application background of the hybrid power system, the electromagnetic transmission studied in this paper is a kind of brushless CVT. There are higher requirements for its control and new requirements for energy management of hybrid power system with fuel economy and low emission. In this paper, the principle of hybrid power system based on electromagnetic transmission is analyzed. The characteristic of electromagnetic transmission is analyzed by graphic method, and the working state and energy flow of electromagnetic transmission with different speed ratio are obtained. The working principle of the hybrid power system is analyzed, and the power relationship between the ports of the hybrid power system is determined, and the working mode of the hybrid power system is analyzed, which provides the basis for the control of the system and the formulation of the energy management strategy. Secondly, the control strategy of hybrid power system based on electromagnetic transmission is studied. The mathematical model of electromagnetic transmission system is established. In order to avoid the loss of torque transfer ability of electromagnetic transmission when the power system output speed and internal combustion engine speed difference is large, the magnetic weakening control method of electromagnetic transmission is proposed. The simulation results show that: The proposed weak magnetic control method has a good control effect on electromagnetic transmission. The coordinated control strategy of electromagnetic transmission system is proposed and simulated under various operation modes. The simulation results show that the proposed control strategy has a good control effect on the system. Thirdly, the energy management strategy is studied in order to improve the vehicle economy while satisfying the vehicle dynamic performance. Firstly, the basic theory of fuzzy control is introduced, then the principle of energy management is analyzed, and then the driving fuzzy controller and braking fuzzy controller are designed. Finally, the hybrid electric vehicle simulation model is established with Cruise software to verify the energy management strategy. The simulation results show that the engine is running on the optimal efficiency curve under the NEDC and UDDS operating conditions, and the simulation results show that the engine is running on the optimal efficiency curve. The battery is optimized. In order to evaluate the effect of the proposed energy management strategy on automobile fuel economy, the comparison with the test results of Prius2012 shows that the energy consumption of the proposed energy management strategy is very close to the energy consumption of Prius2012, indicating that the performance of the energy management strategy proposed in this paper is good.
【学位授予单位】：哈尔滨工业大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：U469.7
，
本文编号：2468826
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