Contact Motion on Surface of Asteroid

Journal of Spacecraft and Rockets - Tập 51 Số 6 - Trang 1857-1871 - 2014
Simon Tardivel, Daniel J. Scheeres, Patrick Michel1, S. Van wal, Paul Sánchez
1University of Nice Sophia Antipolis, Centre National de la Recherche Scientifique, 06304 Nice, France

Tóm tắt

A comprehensive method for modeling the motion of a spherical pod at the surface of an asteroid is presented. Using triangular faceted surfaces, the largest features of the asteroid (global shape, monoliths, and large boulders) are modeled. The presence of smaller rocks is accounted for using a stochastic model of rock generation and collision. The contact dynamics on regolith or harder surfaces, including multiple contact points situations, are described. The force, torque, and coefficient of rolling resistance are introduced, explained, and estimated. Finally, this model is applied to a hypothetical deployment case on asteroid Itokawa. The numerical simulations show landing time around 5 h, with the main landing basin located in Muses Sea. It also proves the importance of each and every level of detail of the asteroid model for an accurate understanding of asteroid surface motion and the effective design of practical deployment strategies.

Từ khóa


Tài liệu tham khảo

10.1016/j.actaastro.2013.06.028

10.1126/science.1126164

Dowson D., 1998, History of Tribology, 2

10.1098/rstl.1876.0006

BakerI. O., A Treatise on Roads and Pavements, Wiley, New York, 1906, pp. 3–44, Chap. 1.

10.1111/j.1945-5100.2012.01380.x

10.1209/epl/i2001-00508-7

10.1103/PhysRevE.64.051302

10.1088/0004-637X/727/2/120

10.1126/science.1125841

10.1016/j.icarus.2013.11.010

10.1186/BF03352757

10.2514/1.59106

10.1016/j.actaastro.2013.03.007

Tardivel S., 2014, Proceedings of the 24th AAS/AIAA Space Flight Mechanics Meeting