# Amadee-20-TUMBLEWEED-JRP

Last modified by Dominik Rabl on 2021/11/22 16:34
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### Details

Acronym | TUMBLEWEED-JRP
Description | Tumbleweed is the concept of a spherical rover to be deployed on Mars.
Principal Investigator (PI) | Julian Rothenbuchner | julian@teamtumbleweed.eu
Organisation | University of Technology, Vienna
Co-Investigators | Moritz Stephan, Stanford University; Wurlitzergasse 93/23, 1170 Vienna E-mail: moritz@teamtumbleweed.eu Dominik Schmidt, University of Technology Vienna; Hietzinger Hauptstr. 69/3, 1130 Wien, : E-mail: dominik@teamtumbleweed.eu Amelie Finan, University of Vienna; Bernhard Schilcher Straße 18, 2000 Stockerau E-mail: amelie@teamtumbleweed.eu Josef E. Pürmayr, Sir Karl Popper school; Wiedner Gürtel 68, 1040 Vienna; E-mail: josef@teamtumbleweed.eu

### Summary

Tumbleweed is the concept of a spherical rover to be deployed on Mars. They are designed to be spheres of a
diameter of 5 m equator-wards by Martian winds. One Tumbleweed consists of a sturdy aluminum/composite
outer frame and sails arranged to provide optimal air resistance. Solar cells on the sails provide power. Sensors
and electronics are attached to the outer frame. The first Tumbleweed prototype was already participating in
the AMADEE-18 mission. The research questions for the AMADEE-20 experiment can be summarized as:

1) What is the performance of the solar cells perform under operational conditions? Specifically, what is
the effect of the constantly changing illumination angle caused by the rover’s movement
and different times of day?
2) What is the distribution of abrasion on the Tumbleweed’s structure? Surface abrasion is
expected to be one of the main factors limiting the structural lifespan of a Tumbleweed
Rover. The aim is to find out more about the rate and distribution of this abrasion. The
test shall be conducted in sandy as well as increasingly rocky environment.
3) How does the Tumbleweed’s speed and direction of movement vary under different
wind conditions?

# Experiment Data

Date | Files
--- | ---
2021-10-15 | pictures of wring issues
2021-10-17 | repair pics
2021-10-18 | troubleshooting pics
2021-10-19 | Pictures and Video
2021-10-20 | 2xVideo, 5 pics, POI.md
2021-10-22 | 7 pictures
2021-10-24 | 2 videos
2021-10-29 | 1 video

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Created by David Gschliesser on 2021/08/14 17:42

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