Progress

 

MISSION
DEFINITION

Lead

AIRBUS GmbH

Contributors
AIRBUS SAS, AIRBUS LTD, GMV, SPACEAPPS, SENER Aeroespacial, DFKI, ISISPACE

01

 
 

JUNE 2021

PERIOD demonstrator © Airbus
PERIOD demonstrator © Airbus
Highlights Summary

The initial baseline for the PERIOD demonstration mission has been developed and presented at the Mission Definition Review (MDR)

Main Results / Significant Achievements

The PERIOD demonstration objectives have been elicited from the high-level customer needs. Substantiated by programmatic constraints, technical feasibility and market opportunities, they have been translated into detailed mission requirements. A mission architecture has been developed that maps those requirements to mission phases and physical entities.

The mission phases have been aligned in a high-level mission sequence that served as an input for the initial operations planning. Likewise the physical decomposition has been used as an input to the definition of the system concept.

In parallel, also the mission for the payload satellite with its scientific mission has been plotted. The results of the combined Mission Definition process have been formalized in the Mission Description Document and submitted for review during the Mission Definition Review (MDR).

What is next

In the next iteration of the Mission Description the findings from the MDR will be implemented. Based on this update the system requirements will be adapted and flown down to the next level of decomposition.

Throughout the development of the PERIOD demonstration the MDD will be kept up-to-date and continue to serve as a reference for the technical design.

 

CONCEPT
DEFINITION

Lead

AIRBUS GmbH

Contributors
AIRBUS SAS, AIRBUS LTD, GMV, SPACEAPPS, SENER Aeroespacial, DFKI, ISISPACE

02

 
 

JUNE 2021

Bartolomeo at ISS © Airbus 2021
Bartolomeo at ISS © Airbus 2021
Docking mechanism could lead to refuelling satellites still in orbit pillars
Docking mechanism could lead to refuelling satellites still in orbit pillars © ESA
Highlights Summary

As part of the mission definition phase, the initial architecture concept and product tree as well as mission and operation phases have been elaborated with the team utilizing Airbus’ Model-Based Systems Engineering (MBSE) development process and toolchain. The mission phases and system concept were defined using Bartolomeo as the baseline for the platform. Nevertheless, the definition of the architecture, the product tree and the operations also took into account the transferability to other (free-flyer) platforms aiming at implementation of future applications after the demonstration. The detailed PERIOD architecture definition started after MDR with the functional definition and the preparation of trade-off studies for the major technical aspects.

Main Results / Significant Achievements

Bartolomeo provides an excellent environment for initial in-orbit demonstrations (IOD) of the technological capability and feasibility for the OSAM use cases, to prove and evaluate related operational concepts as well as to increase maturity of space robotics technology first used in space. Repeatability of the necessary operations enables evaluation and generate evidence in terms of performance, robustness and success probability. The costs and effort for logistics, infrastructure and other aspects not related to the robotic capabilities can be kept low.

The robotic factory IOD will aim at assembling a small satellite with a large antenna reflector manufactured in space, exchanging payloads of the satellites and performing an attachment and refueling experiments utilizing ASSIST.

The architecture definition, implementing the integration of the SRC building blocks in a robotic factory, is currently ongoing and major trade-off studies are under preparation. The decisions for the system concept are ranging from the number of manipulators to the use of Standard Interconnects down to the software functionality and sharing of control between ground and in orbit execution.

The redundancy concepts for the different subsystems and equipment’s is under specification to meet the overall mission dependability.

The complete architecture definition will be represented in an MBSE environment to model the mission definition, the operational definition, the functional definition and the logical definition in one SysML model.

What is next

In the next steps, the required functions to realize the defined operations and their allocation to the logical and physical elements (subsystems) will be described in the MBSE model and a more detailed design of the factory architecture and the accommodation will be developed. In addition, needed analyses will be carried out with regard to various criteria such as function, structure, electrical, computing power, etc. and the concept is optimized iteratively based on the results and relevant trade-off.

 

TECHNOLOGY
DEVELOPMENT

Lead

DFKI

Contributors
AIRBUS GmbH, GMV, SPACEAPPS, SENER Aeroespacial, ISISPACE

03

 
 

JUNE 2021

F3.OG2-ERGO autonomous freamework architecture
OG2-ERGO autonomous freamework architecture
ESROCOS
ESROCOS
Highlights Summary

The overall objective of this activity is to increase the maturity of core software components and prepare them for an in-orbit demonstration mission. To this aim in the first phase of the project the core software technologies (i.e., ESROCOS, ERGO, InFuse, I3DS) were evaluated with respect to the existing technical requirements and their further developments identified to advance their implementations to technology readiness level five (TRL 5).

Main Results / Significant Achievements

The main results of the activity achieved till the Mission Definition Review consist out of a) providing a reference document for space software development and evaluation, b) specifying an overview of the reference implementations of core (software) building blocks (i.e., ESROCOS, ERGO, InFuse, I3DS), c) illustrating available capabilities in an early demonstration scenario, d) identifying implementation gaps of the reference implementations with respect to the performance requirements, e) defining further development activities to close identified implementation gaps and advance the building blocks to TRL 5.

The identified procedures for space software development and evaluation rely heavily on a set of European Space Standards of the European Cooperation for Space Standardization (ECSS) as well as the software development guidelines defined by the Motor Industry Software Reliability Association (MISRA), i.e., MISRA C and MISRA C++.

What is next

Next steps of the activity planned till the Preliminary Design Review (PDR) will involve in the first place the refinement of the already identified gaps and technical requirements of the building blocks. The implementation phase will follow to close the identified gaps and advance the software in question till TRL5. At the same time, the test and validation plan will be prepared that will be used after the PDR to perform the technology readiness assessment (TRA) of the involved software building blocks.

 

CHALLENGES AND
OPPORTUNITIES

Lead

AIRBUS GmbH

Contributors
AIRBUS SAS, AIRBUS LTD, EASN-TIS, GMV, SPACEAPPS, SENER Aeroespacial, DFKI, ISISPACE

04

 
 

JUNE 2021

International Space Station © AIRBUS
Highlights Summary

The implementation of the highly complex PERIOD demonstration will provide a great opportunity to offer a new range of products and services to the potential customers. On the other hand the complexity of this project is also a great challenge.

Main Results / Significant Achievements

PERIOD will integrate many difficult tasks from the In-Space Manufacturing and Assembly (ISMA) domain. Each one of them requires the development of dedicated demonstration kits, tools, skills and operational procedures. And all of these constituents need to be safe, dependable and resilient in their work environment. Thus a large challenge is the integration of those elements into a working system.

Due to the remoteness of space being one key aspect in the future utilization of the system, a high level of autonomy will already be implemented in the demonstration mission.

If the ISMA activities will be successfully demonstrated within the scope of the PERIOD demonstration, this could be an enabling factor to a possibly large commercial market.

What is next

One of the next challenges to be tackled would be the logical integration of PERIOD on the Bartolomeo Platform attached to the ISS. It should be demonstrated that the PERIOD operations can be performed within the constraints of the platform. The most important aspects will be the safety of the crew in extravehicular activities (spacewalks) and avoiding any disturbance of the ongoing ISS operations.