Mission and GNC Design of Terminal
Entry and Landing Missions for Advanced
Re-Entry Vehicles

The REVLANSYS study aims to develop key technologies in the field of Mission Engineering and GNC for autonomous re-entry vehicles, and to derive coherent mission, system and GNC requirements for the specific terminal entry and landing phases. As such, REVLANSYS will provide support to European activities towards an autonomous end-to-end mission for a reusable re-entry system, as the SPACE RIDER, with the objective of performing an end-to-end design of the Terminal Area Energy Management (TAEM), descent, and landing phases.

Elecnor Deimos supported European activities towards an autonomous end-to-end mission for a reusable re-entry system.

Elecnor Deimos was responsible of the study in coordination with the European Space Agency.

A preliminary design activity was carried out to evaluate different solutions, including winged vehicles landing on a runway and lifting bodies performing a soft landing with a parafoil. A Multidisciplinary-Design Analysis and Optimization process (MDA-MDO) has been implemented as the instrument to evaluate the performance of the different concepts as a function of key design parameters, and produce optimized solutions that have been traded-off to identify the best option for a detailed Mission and GNC design.

A Guidance method has been developed to provide trajectory generation capability during the TAEM phase (from supersonic to subsonic flight) and during the descent phase under a parafoil, and a hybrid Navigation system making use of IMU-GNSS-FADS and altimeter measurements has been tailored. Mission and GNC performance have therefore been assessed in terms of flying qualities, trajectory, Guidance and Navigation, considering a high-fidelity simulation environment adapted to the TAEM and descent and landing scenario.

This study resulted in the design of a Mission and GNC solution for the terminal entry and descent landing phases of a return mission, consistent with the overall mission needs. Also, it allowed identifying the capabilities of the detailed design solution, and the possible limitations and improvements that are necessary to achieve a complete and robust mission and GNC design.

Thanks to the knowledge gained during the project, Elecnor Deimos is now capable of offering end-2-end Mission Engineering and autonomous GNC solutions for future European re-entry missions.


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