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Simulation, testing and analysis of CAN-based avionic networks

Along with the CAN protocol, the CANoe.CANaerospace 7.2 development and test tool from Vector supports the Arinc protocols 810, 812, 825 and 826 and CANaerospace. The Arinc protocols have been developed within the Arinc organization, which manages and administers a number of specifications in the aerospace field. One of the primary applications of the PC-based tool is testing ECUs and networks – from simple interactive tests performed in design or implementation to systematic automated tests.

ARINC 825 SPECIFIES both the fundamental communication within CAN-based subsystems and between CAN subsystems, which might be interconnected by AFDX (avionics full duplex switched Ethernet) networks. It offers addressing mechanisms, communication mechanisms, a service structure, profile descriptions and much more. This profile files can be read-in and exported. Building upon this, it is possible to display messages and their data contents on the system level, service level and message level. Examples include cabin pressure control, waste-water, body pitch angle, boiler water temperature and others. Sending of messages and their data contents is also parameterized in this way. Arinc 826 specifies software download via CAN. The mechanisms of Arinc 615A were adapted and optimized for CAN.

The Arinc 810/812 protocol is used to standardize communication between on-board galley inserts, for example. The focus here is on power management. Today’s challenges in the development of on-board galleys involve the issues of increasing modularization, interchangeability and the disposal of aircraft electronics. Arinc 810 defines the physical interfaces for this and Arinc 812 the CAN-based galley data bus. Among other things, it provides services and protocols for coordination of on-board galley inserts by the galley master control unit.
The first CAN-based protocol used in avionics, CANaerospace, was developed by Stock Flight Systems. Applications include engineering simulators, simulation cockpits and especially drones. (hz)

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