| At present, our country has successfully completed the task of Chang E III. According to the program of our country,we will achieve manned lunar-landing around 2025.Lunar rover on the surface of complicated and harsh environment put forward higher requirements of the traction performance, bearing capacity and comfort. As the temperature of the lunar surface can reach 150 degrees Celsius in the day and 180 degrees below zero in the night, the rubber tire technology which is more mature on the earth cannot be applied to the moon. So manned lunar rover wheel research is a new field relative to the other parts of lunar rover. And manned lunar rover wheel research has become the current focus of each space agency on the research content.so that the wheel of lunar rover has become the key research content.This paper focuses on the related research about flexible metal manned lunar rover wheel structures, A XCU type of flexible metal wheels structure has been presented aim at the severe slippage of the Apollo manned lunar rover because of the lack of traction,according to the theory of ground vehicle mechanics and mechanics of soil plasticity wheels and Apollo manned lunar rover wheels on the lunar surface different road driving capability in-depth research and analysis, including the following respectively content.(1) In this paper the configuration design ideas of XCU type wheel has been described in detail, the 3D model has been built and the mechanics of all the components of the wheel has been analyzed by using Solidworks.The results show that each wheel integral part of the configuration meets the mechanical requirements.(2) Based on the vehicle ground mechanics, plasticity theory of soil mechanics and relative knowledge, this article has carried on the introduction summary of the road which the manned lunar rover will encounter while travelling on the surface of the moon. Then mechanics medals of Apollo maned rover wheels and XUC wheels were built respectively on soft lunar soil road,on soft lunar road mixed with volcanic and on hard rock road. Compared with the other studies, the road condition in this paper is more rich and comprehensive. Compared with the previous single on soft soil road relevant analysis and research, this paper has a number of different road surface of wheel traction ability to make comparison, and the analysis results have reference value. It is found that XCU type wheels perform much better than LRV on all types of road except on hard rock road because of the lack of the traction by calculating the hook traction of two type wheels and analyzing the performance of two types wheels on three different roads.(3) As the vehicle climbs, the disabled and crossing ravines ability need to be verified by dynamics software related experiment, the dynamics simulation of two kinds wheels of the vehicle was carried out by Adams in this paper.Then the model of the chassis and 3D model of the road were built by using Solidworks software. then the chassis was assembled respectively to the Apollo wheels and XCU wheels. After contact model defined vehicle and the road surface into Adams software separately for either vehicle climbing, obstacle crossing trenches and simulation analysis, including analysis of the ramp climbing two were 20° and 25° ramp, trench width 0.4m, when the obstacle analysis included vehicle and bilateral obstacle unilateral obstacle, obstacle height were 0.3m.Comparative analysis found containing XCU type wheel lunar rover on the barrier performance significantly better than the Apollo manned lunar rover, especially unilateral obstacle, two other traffic types of vehicles are in good performance. |
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