大学毕设论文__矿用重载车辆电子差速系统设计.doc

矿用重载车辆电子差速系统设计 摘要：为了降低能源消耗与减小环境污染，新能源电车已成为未来车辆行业发展的主要趋势。国、内外各大汽车生产厂商与科研院所纷纷投入大量的人力、物力、财力来研究、制造电车及其相关的零部件。目前轮毂电机驱动式电车以其简单的机械传动结构，较高的驱动效率，低廉的成本等诸多优点已成为研究的热点。但轮毂电机驱动式电车不能采用传统的机械差速器，来实现车辆的顺利转弯。而电子差速器则可以解决这一问题。同时，文章完成了电子差速系统硬件电路的设计、软件的设计、CAN 通讯协议的设计。最后利用MATLAB/Simulink 仿真软件，模拟仿真分析。通过仿真表明，电子差速控制系统设计合理，差速效果良好。电子差速器的设计，解决了轮毂电机驱动式矿用重载车辆的转向问题。相比于传统的机械差速器，电子差速器避免了复杂的机械传动结构，大大简化了电车的底盘空间。另外，相比于其它的电子差速器，此电子差速器避免考虑路面及转向角度的问题，简化了控制计算方法，提高了控制系统的稳定性，使车辆具有更佳的转弯性能和控制响应。 关键词：矿用重载车辆；轮毂电机；自适应；电子差速 Design of electronic differential speed system for heavy duty vehicle Abstract: The new energy vehicle has become the trend of the automotive industry in the future, because it can reduces the energy consumption and environmental pollution.Most auto-builder and research institutes have invested a lot of manpower, material and financial to research and manufacture electric vehicles. Recently, the electric vehicle swhich droved by wheel motor has become the focus to research, because it has a simple mechanical structure, higher drive efficiency, lower cost and many other advantages. But the electric vehicles which droved by wheel motor can not use the mechanical differential,when turning. So the electronic differential is needed to solve this problem. The article analyses the structure and mechanics principle of mechanical differential,also used of the principle of differential under the same force of mechanical differential,put forward a control strategy of electronic differential. The design used a front-wheel-drive by brushless DC hub motor, and analyses the motor’s struck and working principle.Through building the mathematical model of brushless DC hub motor, analyses therelation of various parameters, and combined with the speed control system of brushless DC hub motor, designed the speed control program of electronic differential. In order to establish a more specific electronic differential control model, the article designed the hardware circuit, software a