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Mars Moon eXploration Rover

Thermal modeling and testing of the MMX rover locomotion system at DLR Oberpfaffenhofen. Mission status: Launch planned for 2026; currently under review by JAXA/CNES/DLR.

Role Graduate Researcher (MSc Thesis)
Organisation DLR Oberpfaffenhofen
Mission MMX — Phobos rover
Period 2019 – 2020
Harald Luiks at DLR during MMX rover thermal testing
At DLR Robotics & Mechatronics department during MMX rover testing

Project Overview

At the DLR department Robotics and Mechatronics in Munich, I wrote my thesis on thermal modeling and testing the Mars Moon eXploration (MMX) rover. The MMX rover is planned to travel to Phobos, one of the two moons of Mars, aboard a Japanese spacecraft.

The rover will be exposed to an extremely tough thermal environment, therefore thermal analysis and testing is vital for mission success. The research focuses on the locomotion system — a complex and dynamic subsystem with the objective to ensure the rover stands up after landing and is able to drive around on Phobos. My objective was to perform thermal modeling and simulations on the locomotion subsystem, determine test requirements and boundary conditions, and demonstrate functionality and performance of the locomotion subsystem in the expected thermal-vacuum environment via long duration, automated testing.

Open-Source Packages

Three Python packages were developed during this research and published on GitHub.

Python package for reading values from a Graphtec GL840 temperature logger via PyVisa. Used for data acquisition during thermal vacuum testing.

Python interface for the Rohde & Schwarz HMC8041, HMC8042, and HMC8043 power supply suite — all models in one class via PyVisa.

Python Matplotlib package that generates plots fully compatible with the TU Delft LaTeX thesis template (Utopia font).

Test Setup

The rover locomotion system in the thermal vacuum facility at DLR
The rover locomotion system in the thermal vacuum facility at DLR
EGSE setup outside the TVAC chamber
EGSE setup outside the TVAC chamber