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In future lunar exploration missions, rovers are required to traverse over rough terrain. In order to improve the ability of obstacle surmounting on lunar surface, this paper proposes a new-style travel mechanism for lunar rovers. This mechanism mainly consists of four main legs and two assistant legs. By establishing its dynamic model using the Lagrange's equations and making dynamic simulation, many references have been provided to the control system. Through analysis we found that the ability of obstacle surmounting and the stability of this new-style six leg-wheeled lunar rover have been improved.

Experimental factors have great influence on the vibration medal test. Using a box body of automobile gearbox, firstly, the first several orders frequencies can be calculated by using finite element analysis method. Secondly, based on the vibration modal tests of box body of automobile gearbox, the corresponding modal parameters can be obtained on the both elastic suspension and elastic support; then the effect of the experimental results were discussed on different constraint conditions. Thirdly, by comparing the results of finite element analysis method with the experiment results on different constraint conditions, the reasons of the influence which caused by the constraint conditions were discussed. Finally, suggestion for reducing the errors induced by constraint conditions was put forward in the article. The results of the experimental Analysis have engineering significance.