Abstract: A sampler carried on the end of the manipulator was designed in view of the sampling task of the lunar surface regolith. Based on the discrete element method, the parameters matching of the simulation particle characteristics was completed by using the data of the miniature three axis compression test data of Scott real lunar regolith. The simulation analysis of the sampling process of the sampler was carried out and the dynamic characteristics of sampler during the working process were obtained. In addition, the performance test system of sampler was set up. The sampling test was carried out for different simulated lunar soil. The test acquired the sampling capacity of the sampler changing with the depth and the lunar soil hardness. And the feasible region of the sampling device's operating parameters was obtained by testing. The sampler can achieve the multiple tasks of transferring encapsulated containers, shoving and excavating. The research work will provide reference and technical support for future lunar sampling missions in China.

Key words: lunar regolith, sampler, parameter matching, discrete element simulation, test and analysis