Structure Design And Optimization Analysis Of Manned Lunar Rover Concave Wheel

Because of diversity, complexity and unknowable environment of lunar, the lunar rover has become indispensable tools to improve the detection efficiency, expand the carrier detection area and increase research project. As an essential tool for deep space exploration, manned lunar rover is extensive and in-depth studied. According to the domestic and foreign research situation and the performance in the process of practice of lunar rover, we know that there is an important influence of lunar rover wheel structure and mechanical properties of wheel-soil interaction performance of lunar rover. And the right wheel structure is the key to solve the lunar rover dust and subsidence problems, improve the tractive force and driving torque, enhance the running stability, improve the performance of the lunar rover.(1) Combined with the characteristics of domestic and foreign detector wheel, we use the concept of the concave wheel, and analyze the strength of key parts.(2) Establish the concave wheel-soil interaction model, the soil model and the model of subsidence. Make subsidence, traction force and driving torque as the evaluation index, using ABAQUS to analyze concave wheel, we learn how structure parameters, include concave wheel width, diameter and recessed depth impact each index.(3)Making the concave depth and the convex height the same, and contrasting concave wheel and ordinary convex wheel, we can obtain the advantage of concave wheel in the roll stability and properties of raising lunar dust and three evaluation indexes.(4)The single wheel under different conditions were analyzed to understand the advantages and disadvantages of concave wheel. Setting the elastic modulus, internal friction angle and slip rate of lunar soil parameters as variables, contrast the wheel sinkage, tractive force and driving torque, to understand the impact of lunar soil characteristics on the wheel motion.(5)Setting four wheel vehicle as the research object, seven kinds of operating conditions were analyzed to understand the driving stability and tilt angle of vehicle in different working conditions. It provides a reference for lunar rover driving route selection and deal with the obstacles.