D-centrAR

The D-centrAR project objective is to reduce the excess of wiring in a Boeing 737-800 aeroplane ( as the first reach of the project); an important problem of modern aviation is the enormous amount of wiring used, in the said aircraft there are up to 100.000 wires, with a total length of more than 460 km (285 miles) and 5700 kg (12566 lbs), which amounts to 5% of the total dry weight (41.400 kg (91271.377 lbs)) of the vehicle, all this inside a 36 meters (127 ft) long aircraft.

A diverse array of transmission tech is available to use in this project; employing optic fiber, RFID chip tags, nodes-centered connections design, multiplexers, and a decentralization of power systems, not only do we avoid the problems of a lot of data wiring, but we simplify the maintenance of the vehicle as well as had functionality without any weight penalty.

The advantages of fiber optics over copper wires for data transmission are the following:

• More speed of transmission

• Immunity to electric interference: optic fiber are made of a dielectric material, so there are no parasite currents or electromagnetic influence.

• Reduced size: a 12-fiber wire, which allows for 6 connections, have a diameter of 8 mm (0.32 in.), while a single data copper wire is 6mm(0.24 in.) wide.

• Reduced weight: a optic fiber weight up to 20 kg per kilometer (70 lbs per mile) for a 12 wires set.

• Security: as the data transmitted is a wave of light the signal cannot we intervened from outside the fiber, also any problems of spars or overvoltages are completely avoided, protecting the circuit and the rest of the plane.

• Energy efficiency: due to the low energy requirement for data transmission in optical fiber, its use is more efficient.

• Indirect weight reduction: the mentioned advantages allow for the fiber to require less supports and less electrical isolation, reducing the weight of said systems.

While the optic fiber will we employed in the body of the airplane, en the isolated areas (Wings, Tail) wireless transmitters will be employed, only requiring power wiring for actuators and said emisors. the use of RFID passive tags, due to their low cost, no maintenance (install-and-forget) and the availability of sensors depending on what you wants to read, allow for a radical change in how much data can be extracted from a plane, allowing the collection of data that aren't useful for the pilot while on flight, but can we later collect by maintenance personnel, helping in preventive maintenance of the aircraft. For example, collecting data of the tension cycles of the engine mount system, allowing to check the fatigue life of said component.

Data wiring

Wireless data - nodes' positions

For more detailed pictures, follow trought this link:

Data wiring:

https://drive.google.com/file/d/1BljEfuu0RWCYgt6Ft...

Wireless data - nodes' positions:

https://drive.google.com/file/d/12da2JHyKbz6vdoM_X...

Bibliography

Separata cableado
Sistemas eléctricos de aeronaves
1ra edición
Editorial Sanjurjo Navarro

https://www.telecocable.com/blog/comparativa-fibra-optica-cobre/1185
https://ntrs.nasa.gov/archive/nasa/casi.ntrs.nasa.gov/20120010669.pdf
https://ntrs.nasa.gov/archive/nasa/casi.ntrs.nasa.gov/20070013704.pdf
https://ntts-prod.s3.amazonaws.com/t2p/prod/t2media/tops/pdf/DRC-TOPS-42.pdf
http://737ng-info.blogspot.com/2011/01/boeing-737-600-700-800-900.html
http://www.b737.org.uk/aircraftsystems.htm
https://prezi.com/sgwtq0sshkir/sistemas-de-aeronaves-y-motores/