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当前位置: 首页 > 文章 > 具有平衡摇臂悬架的丘陵山区动力平台转向系统 农业机械学报 2014,45 (3) 13-19
Position: Home > Articles > Steering System Design of Hilly Power Chassis with  Balance Rocker Suspension Transactions of the Chinese Society for Agricultural Machinery 2014,45 (3) 13-19

具有平衡摇臂悬架的丘陵山区动力平台转向系统

作  者：
高巧明;高峰;赖永裕;徐国艳;丁能根
单  位：
北京航空航天大学交通科学与工程学院;广西农业机械鉴定站
关键词：
全液压转向系统;丘陵地区;动力平台;阿克曼转向
摘  要：
为适应丘陵山区地形和不同农作物的农艺特点,提出一种具有平衡摇臂悬架和H型传动的可变地隙和轮距的动力平台,该平台采用无转向梯形的四轮全液压转向,转向方式为同侧两车轮采用对称角度的偏转转向,以减小转弯半径并实现同辙转向.采用遗传算法优化左、右转向油缸的位移关系,以实现阿克曼转向.为避免运动干涉,参照同轴距普通拖拉机的最小转弯半径确定车轮极限转角.当变地隙后车轮绕主销偏转,平台的轴距发生改变和变轮距后轮距发生改变后,可根据几何关系重新确定车轮在水平面内有效转角与转向油缸位移的关系,讨论了变地隙和变轮距满足阿克曼转向的条件.实验结果表明,设计的转向系结构和转向策略是合理的和可行的.
译  名：
Steering System Design of Hilly Power Chassis with  Balance Rocker Suspension
关键词：
Hydraulic steering system Hilly areas Power chassis Ackermann steering
摘  要：
A kind of Hilly power chassis with variable ground clearance and wheel track (VII-HPC) was designed to adapt to hilly terrain and agronomic characteristics of various types of crops. Hydraulic four wheel steering scheme without steering trapezoid has been proposed. To reduce turning radius and achieve same rut steering, the steering strategies are two ipsilateral wheels steering with a reverse and equal angle. The displacement relationship of right and left steering cylinder would be optimized by genetic algorithm to achieve Ackermann steering. The rotation of the steering wheel is not too large to avoid movement interference, which the minimum turning radius of the same wheelbase ordinary tractor was provided a reference. After change ground clearance, the wheel deflected around the kingpin. The relationship between the effective turning angle in the horizontal plane and the displacement of cylinder should be redefined according to the geometric relation. The conditions to meet the Ackermann steering need to be re-discussed because the wheelbase and track of the chassis would be altered after VII-HPC change ground clearance and the track. Experimental results show that the structure of steering system and steering strategy is reasonable and feasible.

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