Avionics buses play a crucial role in aerospace systems by facilitating the integration and coordination of avionics subsystems, such as flight control systems, navigation systems, communication systems, displays, sensors, and other critical equipment. They provide a standardized method for data exchange and reducing complexity by ensuring interoperability among diverse avionics equipment.
Today's commercial and military aircraft utilize both legacy and modern avionics data and video bus technologies including MIL-STD-1553, ARINC 429, ARINC 664, Fibre Channel, SAE 6802 and ARINC 818.
Avionics designers need to integrate high-speed communication technology while still utilizing data bus technologies already integrated. There is no one bus that is going to provide all required functionality and typically in modern systems, two or more buses are used in an aircraft.
Here, compare common avionics network and data bus technologies, including key characteristics that determine which bus is best given a specific technical requirement.
Each protocol has its place in legacy and new military and commercial platforms. In choosing a protocol, one needs to identify the important characteristics of the given project and choose the appropriate bus accordingly.
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