基于ADVISOR的电动拖拉机驱动系统仿真

Simulation on driving system of electric tractor based on ADVISOR

基于电动拖拉机牵引作业的特点,建立了电动拖拉机行驶平衡方程式及传动系统各部件的数学模型。基于ADVISOR软件建立了电动拖拉机仿真模型及变速箱模糊控制策略,开发了电动拖拉机仿真系统。以某型号电动拖拉机为研究对象,分别以运输循环工况和犁耕循环工况为输入,对电动拖拉机驱动系统进行仿真研究。仿真结果表明:随着作业负荷和行驶速度的变化,电动拖拉机驱动转矩、蓄电池电流和电压也相应地变化;蓄电池电量消耗跟作业负荷和行驶速度有关,随着作业负荷和行驶速度的增大,电池所剩容量(SOC)下降加快;电动拖拉机具有较强的抗过载能力,正常作业时能够承受的最大突加载荷可达到额定载荷的1.6倍;并且还具有良好的自适应负载能力,当作业负荷在一定范围内增加时,降低作业速度,电动拖拉机仍能继续作业。

Based on the characteristics of the traction operation of electric tractor, the travel equilibrium equation of electric tractor and mathematical model of each component of the transmission series were established. The simulation model of electric tractor and the fuzzy controlling strategy were established based on ADVISOR, and the simulation system of electric tractor was developed. Taking certain typed electric tractor as the object of study, and taking the operating mode of transportation circulation and the working condition of plough up circulation as the inputs respectively, a simulative research has been carried out on driving system of the electric tractor. The result of simulation showed that along with the variations of operational load and travelling speed, the driving torque of electric tractor and the current and voltage of storage battery vary correspondingly as well. The electricity consumption of storage battery bears a relation with the operational load and the travelling speed, the Soc of battery descents quickly along with the augmentation of operational load and travelling speed. The electric tractor possesses comparatively strong anti-overloading capacity; the maximum bearable suddenly added load, while under the normal operation, could reach 1.6 times of the rated load. And it has nicer self-adapting loading ability as well, while the operational load increased within certain ranges the electric tractor could still operate continuously by lowering the speed of operation.