为提升液压混合动力履带车辆综合传动效率，以履带推土机为例，提出了一种传动系统设计方案。搭建表征行星传动系统动力学特征的矩阵。分别依据物理可行性、系统特性对动力学特征矩阵进行筛选，对比现有履带推土机的直线行驶及转向性能筛选出更优的结构。根据履带推土机典型循环工况，运用全局动态规划方法确定燃油经济性最优结构方案。结果表明：相比于现有的液压传动方案，该方案提升了牵引性能、转向性能及燃油经济性。
Abstract
A powertrain design based on planetary gear sets is developed to improve the transmission efficiency of hydraulic hybrid track-type vehicles. An automated modelling framework is built based on the planetary transmission characteristics to characterize the powertrain dynamics. Screening based on the physical property requirements limits the number of feasible designs. The straight driving and steering characteristics of these feasible designs are calculated to select the better designs compared with existing designs. Finally, a dynamic programming analysis of the typical driving cycle of track-type bull dozers is used to calculate the fuel economy. Simulations show that this powertrain gives better traction, steering performance and fuel economy than existing hydraulic track-type bull dozers.
关键词
履带推土机 /
液压混合动力 /
行星传动 /
动态规划
Key words
track-type bull dozer /
hydraulic hybrid /
planetary gear set /
dynamic programming
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参考文献
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