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Speaker: Pablo Abad-Manterola, Caltech

Date: Thursday, May 22, 2008

Title: Axel Mobility Platform for Extreme Terrain Excursions and Sampling

Abstract: The recent discovery of bright new deposits in two crater gullies on Mars suggests that water still flows in brief spurts on Mars. The Axel rover was developed to access and sample such deposits on the inside of steep crater walls. Axel is a tethered rover that can be a payload on a lander or a larger rover. The primary features of Axel are its minimal complexity and robustness to the treacherous terrain of sites that are of scientific interest. Using a symmetrical design with three actuators, Axel is capable of operating upside down and right side up, enabling it to descend over crater promontories. With its actuated trailing link, Axel can operate on both flat and sloped terrains. Using a sampling device mounted on the trailing link, Axel can collect and store terrain samples and return to its host platform for detailed scientific sample analysis. I will present our preliminary results that demonstrated Axel's ability to traverse both flat and sloped rocky terrain including 90º vertical cliffs and collecting soil samples on slopes ranging from 10º – 40º in the JPL Mars Yard.