铲挖深度是月表采样器的重要技术指标,合理的铲挖深度需既能降低采样器安全风险又可确保一定的采样效率.设计了一种斜插式铲挖方法的月表采样器,针对其构型与铲挖方法,在Reece模型的基础上,通过离散元法推导了月表采样器铲挖阻力矩的表达式.参考历次阿波罗飞船(Apollo)月壤样本数据,在实验室环境下构筑了与月壤物理特性相匹配的模拟月壤,并测得模拟月壤的物理特性参数.然后,根据所测得模拟月壤的物理特性参数,利用所推导的铲挖阻力矩表达式,对月表采样器典型输出力矩下的铲挖深度进行了仿真分析与试验验证,仿真分析结果与试验结果吻合.根据试验结果与月表采样器设计参数确定了合理的铲挖深度,可为月表采样器在月面采样时提供参考.%Excavation depth is an important parameter of lunar regolith sampler.The reasonable excavation depth can not only reduce the safety risk of lunar regolith sampler but also ensure certain excavation efficiency.A kind method of lunar regolith sampler is designed which excavates lunar soil by the way of oblique breaking in.For the configuration and excavation way of the lunar regolith sampler,an equation of excavation resistance torque is derived through discrete element method based on Reece model.Simulated lunar soil is constructed in the laboratory environment referring to the sample data of Apollo and the physical parameters of the simulated lunar soil is measured.The excavation depth of sampler's typical output torque are emulated and tested based on the parameters of the simulated lunar soil and the equation of excavation resistance torque.The emulation results and testing results are coincident.The reasonable excavation depth is proposed based on testing results and the designed parameters of the lunar regolith sampler.The reasonable excavation depth provides reference for lunar regolith excavation of the lunar regolith sampler.
展开▼
