Research points to potential of 'tumbleweed' Mars rovers

The university claims the findings could help inform NASA as to the best-possible vehicle design for Mars missions.

‘There is quite a bit of interest within NASA to pursue the tumbleweed rover design, but one of the questions regarding the concept is how it might perform on the rocky surface of Mars,’ said Dr Andre Mazzoleni, an associate professor of mechanical and aerospace engineering (MAE) at NC State and co-author of a paper describing the research. ‘We set out to address that question.’

According to a statement, Mazzoleni and Dr Alexander Hartl, an adjunct professor of MAE at NC State, developed a computer model to determine how varying the diameter and mass of a tumbleweed rover would affect its speed and ability to avoid getting stuck in Martian rock fields. Rock fields are common on the surface of Mars, which averages one rock per square metre.

‘We found that, in general, the larger the diameter, and the lower the overall weight, the better the rover performs,’ Mazzoleni said. In addition, the study found that a tumbleweed rover would need to have a diameter of at least 6m in order to achieve an acceptable level of performance — meaning the rover could move through rock fields without getting stuck.