Discover how MBSE is used on the Brazilian CubeSat development program. With two nano satellites already in operation (NANOSATC-BR1 and NANOSATC-BR2), the Brazilian National Institute for Space Research (INPE-MCTI) is currently in the conceptual phase of a third mission (NANOSATC-BR3). Giulia Herdies from the Federal University of Santa Maria in Brazil, will present how the Capella tool and the Arcadia method are used in the second phase of the project, to develop the concept of this mission. During this webinar, she explains: -Why the use of MBSE is vital for development of the conceptual phase, by allowing a global understanding of the mission by all involved. -How stakeholders' needs and project restrictions were broken down within the operational, functional and physical aspects, which resulted in a preliminary definition of a viable concept solution.

1. NANOSATC-BR3 CONCEPT DESIGN USING
MODEL-BASED SYSTEMS ENGINEERING
(MBSE)
Giulia Ribeiro Herdies*, Nelson Jorge Schuch** and Eduardo Escobar Bürger***
* Undergraduate student, Aerospace Engineering course, Federal University of Santa Maria - UFSM, Technology
Center, Santa Maria - RS, Brazil. giuliaherdies@gmail.com
**Senior Researcher, Southern Space Research Coordination – COESU/INPE-MCTI, in collaboration with the Santa
Maria Space Science Laboratory - LACESM/CT-UFSM, Santa Maria, RS, Brazil, njschuch@gmail.com.
*** Adjunct Professor, Aerospace Engineering course, Federal University of Santa Maria - UFSM, Technology Center,
Santa Maria - RS, Brazil. eduardo.burger@ufsm.br

2. Table of Contents
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02
03
NANOSATC-BR program;
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OBJECTIVE;
MODEL-BASED SYSTEM
ENGINEERING;
CAPELLA - ARCADIA;
NCBR3 CONCEPT DESIGN
WITH MBSE;
NCBR3 MISSION CONCEPT;
CONCLUSIONS.
DISCUSSION;
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06
03
08
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3. NANOSATC-BR PROGRAM
NANOSATC-BR1
✓ Magnetometer (INPE/MCTIC),
Fault Tolerant FPGA (UFRGS)
and IC on/off driver
(SMDH/UFSM);
✓ Operational since 2014
NANOSATC-BR2
✓ Langmuir Probe (INPE/MCTIC), Attitude
Determination System (Cooperation
INPE/MCTIC with UFMG - UFABC), Other ICs
(SMDH and UFRGS) and two
magnetometers;
✓ Operational since 2021
01 02
Image: NCBR2 [UFSM/Divulgação]
Image: NCBR1 [INPE/Divulgação]
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4. NANOSATC-BR3
Currently in its Conceptual Phase of Development;
Objectives: To study Space Radiation, Technology Validation and
Capacity building development;
Constraint: Reuse and Adapt NCBR1 EM to FM;
Main Stakeholders:
• National Space Research Institution (INPE) Scientists
• Federal University of Rio Grande do Norte (UFRN)/Research
Institute in Natal (CRN)
• Federal University of Santa Maria (UFSM) and Federal University of
Rio Grande do Sul (UFRGS)
• Federal University of Santa Maria (UFSM)
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Image: NCBR3 EM
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5. Mission Objectives
• INPE Scientists: INPE Scientists need to validate a space radiation protective material.
• UFRN/CRN: The UFRN/CRN technologists need to validate their in-house developed
transceiver in space environment.
• UFSM and UFRGS: UFSM and UFRGS technicians and Professors need to validate their
in-house developed integrated circuits (IC´s) against space radiation.
• UFSM: Student Publications.
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6. WHY MBSE?
✓ Easy to understand
✓ Version Control
✓ Traceability
✓ Variety of Stakeholders Needs Management
✓ Interface Requirements Management
✓ Reduce Ambiguous Language
✓ Transition to a Model centric project
✓ For Educational Purposes
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7. OBJECTIVE
✓ Use an MBSE software with an embedded Systems Engineering
method to develop a mission concept;
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8. MODEL-BASED SYSTEM ENGINEERING
One of its main Goals:
Integrate information, communication and the analysis of
systems engineering products.
Modeling is based on three pillars:
• Tool: Concerns to the instrument (usually software) that
will be used to develop the work;
• Language: Method of communication between the user
and the tool (similar to a programming language);
• Method: process that sometimes is conveniently
embedded in the tool.
Tools supporting these concepts
“Formalized application of modeling to support system requirements, design, analysis, verification and
validation activities beginning in the conceptual design phase and continuing throughout development and
later life cycle phases.” - INCOSE SE Vision 2020
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9. CAPELLA - ARCADIA
Arcadia is a system engineering method
based on the use of models, with a focus
on the collaborative definition, evaluation
and exploitation of its architecture.
● Integration of all model views
● Open source
● Largely used by space industry
● Four steps of development
● Interactive and recursive method.
Figure: The Arcadia Method
Source: https://www.eclipse.org/capella/arcadia.html
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10. NCBR3 CONCEPT DESIGN WITH MBSE
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11. NCBR3 CONCEPT DESIGN WITH MBSE
Operational Capabilities:
• Operational Capabilities (Needs);
• Actors (Stakeholders). 11

12. NCBR3 CONCEPT DESIGN WITH MBSE
Operational Activities Interaction: • Operational Activities;
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13. NCBR3 CONCEPT DESIGN WITH MBSE
Operational Architecture:
• Operational Activities;
• Actors.
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14. NCBR3 CONCEPT DESIGN WITH MBSE
System Architecture:
• Actors;
• System;
• System High-
Level Functions.
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15. PRELIMINARY NCBR3
MISSION CONCEPT
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16. DISCUSSION
MBSE main contributions:
✓ Introduce students to system engineering
education;
✓ System boundaries and basic functions;
✓ Support to propose a system concept;
✓ Visual tool – unify system understanding
✓ Reduced project paperwork;
✓ Traceability;
✓ Facilitate at the Mission Definition Review.
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17. CONCLUSIONS
MBSE:
✓ Is making possible a much more structured mission Phase 0;
✓ Has educational purposes competence;
✓ Consolidates and unifies understanding;
✓ Eases the process of requirement validation.
Future Works:
• Interviews with different stakeholders;
• Further modeling of next layers;
• Finalize mission requirements document.
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18. ACKNOWLEDGMENTS
To :
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19. Thanks!
Do you have any questions?
giuliaherdies@gmail.com
Giulia Herdies