Model Based Systems Engineering Cockpit

The objective of the SysAOCS project was to investigate the use of SysML to digitalize the AOCS/GNC description. The project started in February 2022 and was organized into 4 tasks running for a total duration of 1 year. The first task was devoted to the investigation of previous related activities and the selection of two study cases. Among the different SysML methodologies, the SysML ESA Solution was selected and used to build a dedicated AOCS/GNC profile. Space Rider GNC and Euclid AOCS/GNC were picked as reference study case due to documentation available for SENER, the maturity level of the AOCS/GNC as of functional, operational and physical architectures, and diversity of the missions, the former being a re-entry mission and the latter a science one. Task 2 was focused on the AOCS implementation in SysML using data from the selected use cases for the validation of the profile. This validation exercise was very useful to discover gaps and to adapt the SysML profile to cover them. SENER team put special care on the model descriptiveness and, in particular, on the readability of the diagrams from the perspective of AOCS GNC engineers. Feedback from SENER and ESA experts was gathered in dedicated workshop and used to improve the models. Task 3 was dedicated to model the AOCS/GNC design decisions including tarde-off and analysis and to establish data continuity between SyML and Mathworks tools. Finally, during the last task 4 the team compiled the guidelines for the AOCS implementation in SysML in a standardisation document and prepared a roadmap of future activities.