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Thursday, 2017-10-19

LOTAR Electrical Harness Workgroup

Goals and Objectives

The objective of the Electrical Harness Working Group (WG), much like the objective of the LOTAR Project Objective is to develop, publish and maintain standards designed to provide the capability to archive and retrieve Electrical harnesses information in a standard neutral form that can be read and reused throughout the product lifecycle, independent of changes in the IT application environment originally used for creation

The specific goal of the Electrical Harness Workgroup is focused on the long term preservation of the digital electrical harness models for the design, manufacturing and support.

Based on a generic process of development of electrical harnesses, the following picture describes the main categories of electrical harness information to be created in the Aerospace and Defence industry. It allows also to represent the current prioritises of development of the LOTAR 4XX standards:

Associated LOTAR use cases

The LOTAR standards of the family 4XX will answer to the following use cases (in development)

Name (proposal) Status Priority
LOTAR (*) of elec. harness for design & construction for certification Agreed P1
LOTAR (*) of elec. harness for design & construction for reuse / modification Agreed P1
LOTAR (*) of elec. harness for design & construction for visualization Agreed P1
LOTAR (*) of elec. harness for design & construction for support in operation Agreed P1
LOTAR (*) of CAD 3D electrical harness installation for certification Agreed P2
LOTAR (*) of CAD 3D electrical harness installation for visualization Agreed P2
LOTAR (*) of CAD form board for visualization TBD P3
LOTAR (*) of CAD form board for reuse / modification TBD P3
LOTAR (*) of CAD 2D wiring diagram for consultation TBD P4
LOTAR (*) of CAD 2D wiring diagram for reuse / modification TBD P4

 

The use cases related to electrical harness for design & construction cover the different methods used by the aerospace or automotive companies for electrical harness design (see following figure).

The illustration hereafter gives an overview of the main entities of electrical harness for design and construction.

LOTAR test cases

One main task of the working group is the creation of representative test cases illustrating the essential information of electrical harness for design and construction (for example, in order to prepare AP242 ed2). See illustration  hereafter:

List of LOTAR standards of the Electrical Harness family 4XX.

The planned NAS / EN 9300-4XX standards for the Long Term Preservation of electrical harness information are the following:

Part Title (under review) Planned Ballot date
400 Fundamental and concepts for Long Term Archiving & Retrieval of electrical harness information 2017
410 Long Term Archiving and Retrieval of physical electrical harness for design and construction 2017
420 Long Term Archiving and Retrieval of CAD 3D electrical harness installation TBD

Associated ISO 10303 referenced Information model

  • LOTAR standards do not define specific information models for Long Term preservation of CAD and PDM information models. They rely closely on the ISO 10303 Application Protocols, based on the modular architecture, which ensures the consistency of the information models subsets, common to several ISO 10303 standards.
  • In this perspective, the LOTAR “Electrical Harness” WG will contribute to the business requirements and use cases for the STEP AP 242 edition 2 project, targeted to include the information model for electrical harness design. This project is planned to take into account the harmonization / contributions of the STEP AP 212, AP 210, AP 239 and of the VDA VEC specification.

Resulting planning

Way of working – meetings and teleconferences

  • The Electrical harness Working Group holds biweekly WebEx/Teleconf meetings on Tuesday s from 15H00 – 16H00 (European Central Time) , 09H00 am– 10:00am (US East Coast time)
  • Specific session of the Electrical harness WG during the 4 LOTAR annual Workshops

Accomplishments

  • The Electrical harness Working Group was created in February 2012.
  • Start of description of the content of the parts 400 and 410 (preliminary draft)
  • Definition of use cases for the Long Term Archiving and Retrieval of Electrical Harness data.
  • Preparation of test cases for LT preservation of CAD 3D physical electrical harness definition
  • Analysis of the glossaries and of the existing standards relation to interoperability of electrical harness design (STEP AP 210, VDA VEC specification, ...).
  • Start of coordination with other standardization projects related to electrical harness
  • Draft list of essential information for electrical harness design & construction
  • Preparation of A&D business requirements for the STEP AP242 ed2 standard

Related standardization projects:

STEP AP 212
STEP AP 210
STEP AP 239
STEP AP 242 project: www.ap242.org
Access to AP 242 ed2 White paper: Link
VDA VEC specification: Link