
Analysis of drawbar pull to CE-4 Lunar rover based on rutting image of wheel
HU Zhen-yu, SHEN Yan, WANG Wei-jun, LUO Xiao-tao, ZOU Meng
Analysis of drawbar pull to CE-4 Lunar rover based on rutting image of wheel
In order to assess the lunar surface trafficability of YuTu-2 lunar rover, a kind of method of lunar rover drawbar pull evaluation based on slip ration information was proposed. The wheel of the Yutu-2 lunar rover and its ground prototype were used as the test objects, the YuTu-2's lunar drive was simulated by the whole vehicle test and soil trough test. With the input parameters of rutting information, slip rate and wheel load, the calibration models of sinkage-slip rate and rut spacing-slip rate were established, the slip rate was identified by Matlab image processing. The results showed that the slip rate of the YuTu-2 lunar rover traveled in the specified area of the lunar surface at locations D', A', and B', respectively is 10.45%, 12.96%, and 19.70%, and the drawbar pull is 177.03 N, 181.62 N, and 194.47 N.The ground test and inversion calculation results reveal that YuTu-2 travels well in the aforementioned region and satisfies the design requirements.
terramechanics / lunar rover / lunar soil / slip ratio / rutting
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