Design of Wheel of Manned Lunar Rover and Research on Terramechanics Model for Wheel-terrain Interaction Based on Elastic Wheel

doi:10.3901/JME.2016.10.119

Abstract

Abstract: Based on the fact that the current wheels of lunar rover vehicle are difficult to meet the needs of manned transportation, a new woven wiry cloth wheel consist of hub-rim combination slide mechanism is designed, to ensure the convenience of changing wheel and the ability of shock resistance. Simulation models are created to analyze the trafficability of the designed wheel after demonstrating the accuracy of the simulation. Compared with the same-size conventional lunar rover wheels, the designed wheel has lighter structure and more excellent shock resistance. It also has stronger traction than the smooth rigid wheel because the tire of the designed wheel has elastic deformation which increases its contact area with lunar surface. The conventional normal and shear stress distribution models are improved by importing a slope factor to reflect the deformation of wheel. With loads of 1 000 N and 1 500 N, while the slip ratio is 0.2, the relative error of the calculation value using the improved models and simulation data for drawbar pull is less than 15%. Traction coefficient is used to assess the trafficability, and a curve is fitted and the equation is established about traction coefficient together with load based on the coefficient of determination, which can provide the optimal load for trafficability.

Key words: manned lunar rover, trafficability, wheel-terrain interaction, woven wiry cloth wheel

CLC Number:

V416

XIAO Wanshen, ZHANG Yan. Design of Wheel of Manned Lunar Rover and Research on Terramechanics Model for Wheel-terrain Interaction Based on Elastic Wheel[J]. Journal of Mechanical Engineering, 2016, 52(10): 119-125.

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