轮齿构型对月面巡视探测器车轮牵引性能的影响
首发时间:2009-10-21
摘要:利用模拟月壤颗粒的细观接触力学模型和构建的不规则几何形状的颗粒群系统,对月面巡视探测器车轮与模拟月壤的交互作用进行了动态仿真,颗粒流仿真结果能够较好地再现室内土槽试验中轮下土壤的运动情况以及车轮挂钩牵引力的变化趋势。分析结果显示,在月面环境下负倾角轮齿车轮的挂钩牵引力整体上高于正倾角轮齿车轮的挂钩牵引力,与无倾角的薄直齿轮齿车轮相比,具有轮齿倾角的车轮的挂钩牵引力要大幅下降。在月面环境下,尖刺状车轮在低滑转时,挂钩牵引力为负值,丧失牵引能力;在高滑转率时,牵引能力也十分有限,此种车轮不适合作为月面巡视探测器的车轮结构。
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The effect of wheel-lug type on tractive performance of wheel for lunar rover vehicle
Abstract:The numerical simulation of interaction between lunar rover vehicle’s wheel and lunar soil simulant was conducted besed on Model of contact mechanics of lunar soil simulant’s particle and irregular particle group system. The particle flow simulations represent the movement of soil under wheel and variational trend of drawbar pull by laboratorial soilbin test. The analytical results show the drawbar pull of wheel with negative obliquity’s lug higher than the drawbar pull of wheel with positive obliquity’s lug. Moreover, compared with straight lug wheel, the drawbar pull for wheel with skew lug decreases greatly. At the condition of lunar environment, the wheel with spiny lug loses tractive ability at lower slip ratio, and its tractive ability is limited at higher slip ratio. Therefore, such configuration of wheel could’t be used as the wheel of lunar rover vehicle.
Keywords: Lunar rover vehicle Tractive performance wheel-lug type Particle flow simulation
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