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Réseau de communication courant porteur en ligne pour la collecte d'informations et le diagbostic d'équipements embarqués dans l'aéronef

Abstract : This work focuses on the feasibility of a Power Line Communication (PLC) network for transmitting predictive maintenance data on avionics power lines. PLC is identified as a solution to increase the number of information exchanged without modification of the wiring already present in the aircraft. The approach taken in this thesis deals with the adaptation of existing PLC solutions on the market so that they can be deployed on a conventional avionics network. These modifications include lightning protection and coupling circuits to ensure the communication over the power network. Experiments were conducted to verify the performance that PLC solutions could expect by using the signal-to-noise ratio (SNR) as a comparison paramater.A circuit allowing to respect lightning protection constraints and that allow PLC transmissions has been identified and evaluated by means of simulations and laboratoy experiments. This modificatiosn allowed us to cincrease the SNR of the PLC link up to 40dB. Coulpling circuits on commercial CPL modems have been optimized to better adapt PLC signal to the avionic environment. The design of these circuits is completely described, including the realization of the HF transformer for impedance matching. Once the changes were made, we performed a series of conducted emissions measurements that generated the chipstets to verify their compliance with the CEM DO-160 standarts. The tests focused on conventional modems and modified modems related to conventional avionics equipment. These tests showed us that, without the proposed modifications at the level of the coupling circuit, it is impossible to communicate on very noisy lines. In the case of noise generated at the limit of the DO-160 standart, our modified modem achieves a data rates of 46 Mbps for transmission and 36 Mbps for reception. In this last manipulation, we reach in a worse case of disturbances a data rate higher than the specifications needed.
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https://tel.archives-ouvertes.fr/tel-01849790
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Submitted on : Thursday, July 26, 2018 - 2:48:07 PM
Last modification on : Tuesday, September 29, 2020 - 4:49:29 AM
Long-term archiving on: : Saturday, October 27, 2018 - 1:42:06 PM

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  • HAL Id : tel-01849790, version 1

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Mickael Brison. Réseau de communication courant porteur en ligne pour la collecte d'informations et le diagbostic d'équipements embarqués dans l'aéronef. Autre. Université Paris Saclay (COmUE), 2018. Français. ⟨NNT : 2018SACLC042⟩. ⟨tel-01849790⟩

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