Our EWIS Software

Safran Engineering Services, with the irremediable electrification of aircraft, has had to develop powerful and rigorous tools to manage EWIS (Electrical Wiring Interconnection Systems) design activities. The company, along with IGE-XAO its partner and world-leading software developer for electrical CAD, has launched eCENTRIC.

eCENTRIC: tailor-made for our electrical engineering activities.

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In the current aeronautical industry context, aircraft manufacturers want to focus on an architect and integrator-type activity. The major consequence of this development is that aircraft design and manufacturing work is divided into minimum lots. The supervisors for these lots are major subcontractors, genuine industrial partners for the aircraft manufacturer, whose scope extends from the study phase through to completion.

The job of the electrical installation therefore has to move towards this trend to provide an overall service to the client. Furthermore, the increasingly electric aircraft gives an even more strategic dimension to this activity that needs to be considered as a system in its own right. New guidelines are now including wiring to a certification process. The requirements to be met for the EWIS (Electrical Wiring Interconnection System) are listed in document FAR 25 subpartH.

Traditional solutions consist of detailing block diagrams by analysis (on a system level) so as to break it down to the level of the electrical connection and then to the cable. The wiring diagrams are then used in several ways (depending on internal tools developed by aircraft manufacturers):

  • integrating cable-related data in a database and relationship with a length obtained from the 3D model.
  • Manual recording of lengths on the plane and relationship with cables from diagrams and from a length parameter.

These processes have difficulty being:

  • Sequential, because the "wiring diagram" has to have been drawn to know what length to record.
  • Generators of error, because the routing path calculation is based on objects named differently in the model or aircraft (naming consistency problem).
  • Not optimized as a whole, because there is no guarantee that the associated length is the shortest.

Safran Engineering Services has designed a solution to overcome these difficulties.

Thus, the "eCentric" project represents setting up a set of activity-related software tools to work collaboratively (several people on the same task) and simultaneously (multiple tasks at the same time) on the study and installation of electrical harnesses and to minimize data input tasks for new aircraft-based configurations. Its application is now used in various projects ranging from electrical bays to complete aircraft.

It is part of a strategic approach for Safran Engineering Services since the results of the definitions produced by this process are the inputs of the future production system being deployed (See Harness Manufacturing) in order to limit rework on this interface between design and production.