電動汽車電子差速控制系統(tǒng)研究
[Abstract]:Multi-wheel independent drive electric vehicle simplifies the traditional transmission system and has obvious advantages in driving distribution and vehicle dynamics control. It has become the object of new energy vehicle research and development in enterprises and universities. In recent years, there have been a lot of researches on electronic differential speed, yaw speed control, driving anti-skid and so on, in the key technology of multi-wheel independent drive electric vehicle dynamic control. In this paper, an electronic differential speed control strategy considering the roll motion of a rear wheel independent drive electric vehicle "Xinhuo No. 1" is proposed. When the vehicle turns, the vertical load of each wheel will be redistributed under the action of centrifugal force, and many scholars have studied the distribution of driving force. On this basis, considering that the sideslip of body mass center will also affect the vertical load transfer of the wheel during turning, a new electronic differential control strategy is proposed in this paper. Firstly, the dynamic analysis of the vehicle during turning is carried out, and the influence of centrifugal force on the spring mass, the centrifugal force of the mass under the spring and the deviation of the body mass on the vertical load transfer of the wheel is analyzed respectively. Secondly, according to the research object "Xinhuo No. 1", the vehicle dynamics model is established in CarSim and the control strategy model is built in MATLAB / Simulink. The two models are simulated jointly to verify the control effect of the electronic differential speed control strategy under different working conditions. Thirdly, this paper designs and develops an electronic differential controller, which is designed around the selected electronic differential controller chip Freescale MC9S12XEP100. The hardware of the electronic differential controller is developed by Altium Designer, and the software is developed. Using the MATLAB/Simulink module Real-timeWorkshop code automatic generation function, and in CodeWarriorV5.1 to complete the integration of the program. Finally, the designed electronic differential controller is applied to Xinhuo No.1, and the actual vehicle test is carried out. The experimental results show that the electronic differential control strategy designed in this paper, considering the roll factor, can control the vehicle running stably in a straight line, and realize the differential force and the differential effect of the electronic differential control under the turning condition.
【學(xué)位授予單位】:浙江大學(xué)
【學(xué)位級別】:碩士
【學(xué)位授予年份】:2016
【分類號】:U469.72
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