混合動力三軸物流車能量管理策略研究
[Abstract]:As a vehicle, the automobile brings convenience to the daily life of people, and also brings a lot of problems, and the two most prominent problems are as follows: 1, the petroleum resources which are the main energy sources of the automobile can reach the exhausted state in the foreseeable future; and secondly, as the number of the automobiles is increased, A large amount of the exhaust gas is discharged into the environment and the environment is polluted. As the carrier for human existence, the environment is seriously damaged in the rapid development of the automobile industry. The development of new energy vehicles is one of the solutions to the dual problems of environmental pollution and energy supply, and the hybrid electric vehicle (HEV) has become a hot spot in the field of automobile in recent years. As an important vehicle for the transition of a traditional automobile to a pure electric automobile, the hybrid automobile has a plurality of advantages, Before the key technology of the battery has not been completely solved, the hybrid vehicle has a longer driving range with respect to the pure electric vehicle, and the time for supplementing the energy is shorter. The key technology of the hybrid vehicle mainly includes the following three points: (1) the driving motor and the control technology thereof; (2) the whole vehicle energy management control system; and (3) the power battery and the management system thereof. in which the energy management strategy can reasonably distribute the torque output of the engine and the motor during the running of the vehicle through the control of the power flow of the power source of the vehicle, the torque output of the engine and the motor during the running of the vehicle is reasonably distributed, the fuel economy of the hybrid vehicle is improved, and the service life of the power source is prolonged, and the increasingly stringent environmental protection regulations are met by reducing the emission of the waste gas. In view of the concrete structure of the three-axis hybrid vehicle, this paper sets up its simulation model in the environment of MATLAB/ Simulink, and designs a rule-based energy management strategy based on the characteristics of the plug-in hybrid electric vehicle, so that the fuel consumption of the vehicle unit is reduced by 8. 5%. the fuel economy is improved, a dynamic coordination control strategy is designed, the longitudinal impact generated in the mode switching process is reduced, and the smoothness of the whole vehicle during the mode switching is improved. Finally, the energy management strategy is verified by real-vehicle test. The main contents are as follows: 1. and the three-axis hybrid logistics vehicle model is set up. Firstly, the building method of the model is analyzed, and the whole frame of the whole vehicle model is set up according to the analysis result, and then the whole vehicle simulation model is constructed based on the MATLAB/ Simulink environment; Finally, the model's verification is carried out with the ECE cycle working condition as the input of the simulation model. Three-axis hybrid vehicle energy management strategy design. based on the efficiency characteristic curve of the engine and the driving motor, the whole vehicle running mode is divided by combining the structural characteristics and the working principle of the plug-in electric hybrid vehicle, and then the specific service requirements of the three-axis hybrid power logistics vehicle are combined, In this paper, the design of the specific control flow of the energy management strategy in various modes is carried out, and the design of the fuzzy controller is carried out for the power-assisted mode of the motor. Finally, the simulation model of the energy management strategy is set up in the MATLAB/ Simulink environment. Design of dynamic coordination control strategy for mode switching. First, the vehicle driving performance of the non-mode switching torque coordination control is analyzed, the necessity of the coordinated control of the torque in the mode switching process is demonstrated according to the simulation result, the cause of the longitudinal impact is analyzed, the overall solution of the mode switching dynamic coordination is designed, In this paper, a specific control flow is designed for the engine torque compensation, and a fuzzy controller is designed to control the coupling process of the clutch; and finally, the simulation is carried out based on the whole vehicle model and the energy management strategy model, and the effect of the mode switching dynamic coordination control strategy is verified. Vehicle energy management strategy real-vehicle test verification. Firstly, the type selection of the whole vehicle controller is carried out according to the signal quantity and the type involved in the energy management strategy designed in this paper; then, the controller carries out the distribution of the energy management strategy signal pin, and the model is written into the whole vehicle controller through the CAN line through the Me Ca, Finally, the test scheme of the three-axis hybrid logistics vehicle is designed, the typical urban condition of China is selected as the input condition of the real-vehicle test, and the results of the real-vehicle test are analyzed. The research significance of this paper is to design a rule-based hybrid energy management strategy for three-axis hybrid logistics vehicle through road surface coupling two-axis and three-axis power, so that the whole vehicle can reduce the fuel consumption of the unit cargo by the premise of not reducing the driving power, and the fuel economy of the whole vehicle is improved.
【學(xué)位授予單位】:吉林大學(xué)
【學(xué)位級別】:碩士
【學(xué)位授予年份】:2017
【分類號】:U469.7
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