Investigating the Flexibility of the MBSE Approach to the Biomass Mission

Joe R Gregory, Lucy Berthoud, Theo Tryfonas, Antonio Prezzavento, Ludovic Faure

Research output: Contribution to journalArticle (Academic Journal)

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Abstract

Model-Based Systems Engineering (MBSE) represents a move away from the traditional approach of Document-Based Systems Engineering (DBSE), and is used to promote consistency, communication, clarity and maintainability within systems engineering projects. MBSE offers approaches that can address issues associated with cost, complexity and safety. One way that this can be achieved is by performing early functional validation of the high-level spacecraft functional avionics system. The use case discussed in this paper focusses on the Biomass model, a SysML-based representation of the Biomass Earthobservation mission. The MBSE approach is used to calculate the required size of the data handling unit onboard the Biomass spacecraft. The functional response of the system in terms of the onboard memory usage throughout the mission is simulated. Traditionally, this level of analysis would not be available at this early stage. The approach aims to replace ad hoc, spreadsheetbased calculations with a formal representation of the system that can be executed, interrogated and quantified. The flexibility of this MBSE approach is demonstrated by applying changes to the Biomass project and assessing the time required to implement
these changes in the Biomass model and propagate them through to the results of the simulation. The changes have been made independently of each other and include: changes to the logical architecture, changes to the functional definition, changes to the mission profile, changes to the requirements. Potential areas for improvement regarding the structure of the Biomass model are highlighted and discussed.
Original languageEnglish
Number of pages16
JournalIEEE Transactions on Systems, Man, and Cybernetics: Systems
DOIs
Publication statusAccepted/In press - 23 Nov 2019

Keywords

  • Biomass
  • functional avionics
  • model-based systems engineering (MBSE)
  • modeling
  • systems engineering

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