In order to predict and control the traction trafficability of a lunar rover, an algorithm for mechanical parameters estimation of lunar soil based on linear-least squares method was presented to estimate two key mechanical parameters, i.e., internal cohesion and internal friction angle. The improved wheel-soil interaction model for lugged rigid wheel which considering the effect of wheel lugs on stress distribution was simplified; An algorithm was thus created to calculate internal cohesion and internal friction angle of the soil. Experimental data of wheel-soil interaction were imported into Matlab programs to estimate cohesion and internal friction angle of lunar soil simulant, and the estimated values are close to the measured values of lunar soil stimulant. The results of experimental verification indicate that the algorithm is accurate and effective, moreover, the algorithm also shows good stability and high arithmetic speed, which allows a lunar rover to estimate mechanical parameters of the lunar soil on site.
Iagnemma K,Kang S,Shibly H,et al.Online terrain parameter estimation for wheeled mobile robots with application to planetary rovers[J].IEEE Transactions on Robotics,2004,20(5):951-927
Hutangkabodee S,Zweiri Y H,Seneviratne L D,et al.Performance prediction of a wheeled vehicle on unknown terrain using identified soil parameters //Proceedings of the 2006 IEEE International Conference on Robotics and Automation.Orlando,Florida:IEEE,2006:3356-3361
����,�ߺ���,����ȫ,��.����Ӧ���ֲ��������ֵ�����õ�����ѧģ��[J].��е����ѧ��,2009,45(7):49-55 Ding Liang,Gao Haibo,Deng Zongquan,et al.Terramechanics model for wheel-terrain interaction of lunar rover based on stress distribution[J].Journal of Mechanical Engineering,2009,45(7):49-55(in Chinese)
����,�ߺ���,����ȫ,��.�����ִ�ЧӦ�����۷�����ʵ���о�[J].�ѧ��,2009,30(4):1351-1358 Ding Liang,Gao Haibo,Deng Zhongquan,et al.Theoretical analysis and experimental research on wheel lug effect of lunar rover[J].Journal of Astronautics,2009,30(4):1351-1358(in Chinese)
Ding Liang,Yoshida K,Nagatani K,et al.Parameter identification for planetary soil based on a decoupled analytical wheel-soil interaction terramechanics model //The 2009 IEEE/RSJ International Conference on Intelligent Robots and Systems.St Louis: ,2009:4122-4127
���,����,������,��.�����ֽṹ����������ǣ������Ӱ���о�[J].�ռ��ѧѧ��,2008,28(4):335-339 Li Jianqiao,Zou Meng,Li Yinwu,et al.Study on the influence of lunar wheel configuration for traction ability[J].Chinese Journal of Space Science,2008,28(4):335-339(in Chinese)