• CN: 11-2187/TH
  • ISSN: 0577-6686

Journal of Mechanical Engineering ›› 2024, Vol. 60 ›› Issue (18): 349-361.doi: 10.3901/JME.2024.18.349

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Simulation and Experimental Research on the Sampling Process of the Wheel Brush Asteroid Sampler

LUO Haitao1,2, WEI Qiming1,3, LI Yuxin1,2, WU Xingyuan1,3, FU Jia1,2   

  1. 1. State Key Laboratory of Robotics, Shenyang Institute of Automation, Chinese Academy of Sciences, Shenyang 110016;
    2. Institutes for Robotics and Intelligent Manufacturing, Chinese Academy of Sciences, Shenyang 110169;
    3. School of Mechanical Engineering, Shenyang Ligong University, Shenyang 110159
  • Received:2023-09-05 Revised:2024-07-05 Online:2024-09-20 Published:2024-11-15

Abstract: The brush sampling method based on rotary brush is a new sampling method for asteroid surface regolith particles collection. In order to study the influence of wheel brush speed on sampling effect of wheel brush asteroid sampler and the driving torque required by wheel brush sampling, it is necessary to carry out the simulation and experimental study on the brush sampling process of the wheel brush asteroid sampler. In the study, the glass beads with equal size are selected as the sampling particles to calibrate the parameters of the sampling particles, and the calibrated particles parameters are used in the numerical simulation, and the sampling results and particle flow curves under different speeds are obtained. At the same time, a rotary symmetrical sampling wheel brush device is built for ground test, and the torque change of the wheel brush during the sampling process is tested. The simulation and test results are compared to verify the accuracy of the simulation analysis. The results show that the faster the rotation speed of the sampling wheel brush is, the more particles are sampled, and the greater the driving torque required by the sampling wheel brush is, and the more obvious the torque fluctuation is. This research provides a research idea for the structure optimization design and motor selection of the wheel brush asteroid sampler.

Key words: asteroid sampling, brush wheel sampler, discrete element method(DEM), parameter calibration

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