基于相似理论的月球车月面牵引性能预测

引入相似理论对月球车的轮土交互系统进行研究,建立了月壤-车轮交互系统的地面力学相似模型,针对原位月壤内聚力较小的特点,提出了一种无需改变车轮尺寸、以模拟月壤为土壤介质的模型试验方法,对月面重力环境下月球车轮的牵引性能进行预测.利用室内土槽试验和颗粒流仿真相结合的方法对该模型试验方法的有效性进行验证,验证结果与模型试验的理论分析结果较为接近,表明该法具有较好的可行性和有效性,可考虑用于预测月球车的月面牵引性能.

Prediction of lunar rover's moon tractive performance based on similitude theory

Similitude theory was introduced to study the wheel-soil interaction system of lunar rover, the terramechanical similitude model of the system was created. To predict a lunar rover's tractive performance under moon gravity, a model experimental method was presented based on lunar soil's lower cohesion. In this method, both the wheel shape and wheel size are invariable, the lunar soil simulant can be used as the model experimental soil. The indoor soil-bin test and particle flow simulation were combined to verify the effectiveness of this method, the verification result shows good accordance with the derived consequence of theoretical analysis, which indicates that the method has good feasibility and validity, thereby it can be used to predict a rover's tractive performance on lunar surface.