轮式月面巡视探测器月面牵引性能的预测

通过室内土槽试验和颗粒流数值仿真相结合的方法对轮式月面巡视探测器的轮土交互作用、车轮的牵引特性和轮下土壤变形和破坏进行了深入探讨。以吉林省火山喷发物为原料进行了模拟月壤的配制。设计并制造了深空探测车车轮牵引特性试验台并进行了不同轮齿构型车轮的牵引特性试验,获得了基础性的试验数据。考虑月壤结构松散、颗粒细小、流动性强的离散特征,采用颗粒流法分析了地面重力场下探测车轮下模拟月壤的扰动破坏、土体内接触力的分布、颗粒速度矢量的变化,获得的车轮牵引特性参数与土槽试验数据进行了对比,进一步对车轮在月面环境下的牵引性能做出了预测。

Prediction of tractive performance of wheel on moon surface for lunar rover vehicle

The dynamics of wheel-soil interaction,the tractive performance and the soil transformation and failure beneath the lunar rover vehicle wheel were studied by means of the soilbin lab test combined with the particle flow simulation. A lunar soil simulant was prepared by volcanic eruption material in Jilin province, China. A tractive performance test bed for deep-space rover wheel was designed and manufactured. The tractive performance tests were performed for the wheels with different lug types and the basic test data were obtained. The lunar soil failure by turbulence,the distribution of the contact force in soil and the variation of particle velocity vectors beneath the wheel of lunar rover vehicle under the gravitational field on earth were analyzed by the particle flow code taking into account of the discrete characters of lunar soil such as loose structure,fine particle size and strong mobility. The obtained tractive characteristic parameters of the wheel were compared with the soilbin test data. Furtharmore,the tractive performance of the rover wheel on moon surface was predicted.