ECSS-E-TM-10-25A
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ECSS-E-TM-10-25 "System Engineering - Engineering Design Model Data Exchange (CDF)" is a Technical Memorandum under the E-10 "System engineering" branch in the ECSS series of standards, handbooks and technical memoranda[1].
Scope and Purpose
The Scope statement of ECSS-E-TM-10-25A defines its purpose: This Technical Memorandum facilitates and promotes common data definitions and exchange among partner Agencies, European space industry and institutes, which are interested to collaborate on concurrent design, sharing analysis and design outputs and related reviews. This comprises a system decomposition up to equipment level and related standard lists of parameters and disciplines. Further it provides the starting point of the space system life cycle defining the parameter sets required to cover all project phases, although the present Technical Memorandum only addresses Phases 0 and A. This Technical Memorandum is intended to evolve into an ECSS Standard in the near future. For the time being, it is not yet possible to establish a standard that has the maturity and industrial validation required for application in new or running space projects. In conjunction with related development and validation activities, this Technical Memorandum should be regarded as a mechanism for reaching consensus prior to building the standard itself.
The TM provides the basis for creating interoperable Concurrent Design (CD) centres across the European space community. Allowing semantically consistent data exchange between CD centres. Enabling and supporting joint real-time collaborative design activities involving multiple CD centres. The initial objective of the TM is thus to act as a reference for the creation of new CD centres or upgrade of existing ones.
Structure
ECSS-E-TM-10-25A comprises the following parts:
- Clause 1: Scope
- Clause 2: Normative references
- Clause 3: Terms, definitions and abbreviated terms
- Clause 4: Background and concepts
- Includes the description of the Space Engineering Information Model (SEIM), a conceptual data model for all information needed to conduct concurrent design sessions
- Includes the description of the Space Engineering Reference Data Library (SERDL), an agreed collection of concurrent design organization roles, process concepts, disciplines and parameter types. These are predefined instances of SEIM concepts.
- Clause 5: A list of requirements that two or more parties that want to exchange data for a concurrent design activity shall comply with.
- Annex A: The formal definition of the Space Engineering Information Model (SEIM).
- Annex B: The formal definition of the Space Engineering Reference Data Library (SERDL).
- Annex C: The formal definition of the Web Services Interface and exchange file format.
- Annex D: An informative description of margins and reference frames.
Software Implementations
Open Concurrent Design Tool
OCDT is a client / server software package developed under a European Space Agency contract to enable efficient multi-disciplinary concurrent engineering of space systems in the early life cycle phases. The OCDT client is an add-in for Microsoft Excel® 2010/2013, that is integrated with Excel® to perform simple analysis and simulation. Other client tools for engineering analysis and simulation can also be integrated, through the use of OCDT adapters. The OCDT server consists of a front-end web-services processor (using a REST API) and a back-end PostgreSQL database system for the persistent storage of OCDT shareable data. The server is able to support concurrent teams of more than 20 users and synchronising their engineering model content twice a minute or faster. Typically each user would represent a different domain of expertise (discipline). The package is distributed under an ESA community open source software licence available for use and further development to users that qualify as a member of the OCDT Community[2].
RHEA Group CDP4
The Concurrent Design Platform (CDP™) of the RHEA Group is the main engineering tool to support multidisciplinary teams to perform Concurrent Design of complex systems. The CDP4, an evolution of the CDP3, is an ECSS-E-TM-10-25 Annex A and Annex C compliant implementation, as such it is 100% compatible with the ESA OCDT. The CDP4 is a client / server software solution implemented using C# and a Postgresql RDBMS. The CDP4 Webservices (the server component) can be hosted both on Linux using Mono and Microsoft Windows®. The CDP4-IME is the desktop application that is compatible with Microsoft Windows® 7/10. A Microsoft Excel® 2010/2013 Add-in integrates many of the functionalities of the CDP4 in Microsoft Excel® and is accessible through a dedicated Ribbon and Custom Task Panes.