From Testing to Reliability: Automated Analysis for CAN FD Networks in Aircraft
Reliable CAN FD communication in aircraft applications requires insight beyond the logical interpretation of network data. A synchronized analysis concept connects logical CAN FD network analysis with events on the physical layer through a strict time-related reference.
The Challenge
CAN FD extends the previous CAN standard with larger payloads and higher data transmission rates. The time slot to transmit every single bit is smaller, and reduced signal quality can be a consequence.
For CAN FD network development, this creates additional challenges for network designers due to the higher bandwidth in the data phase. Conventional analysis often focuses on the logical layer and does not provide insight into the actual voltage curves on the line. For complex CAN FD networks, this makes it difficult to assess physical-layer effects such as topology, termination, reflections or electromagnetic interference.
The Solution
A synchronized analysis concept connects logical CAN FD network analysis with events on the physical layer. It establishes a strict time-related reference between both views, so logical and physical network data can be analyzed within one analysis workflow.
Logical frames are linked with the corresponding voltage curves, using the same time base as a foundation for all views. This allows users to move beyond the logical interpretation of CAN FD frames and analyze what is happening on the bit and byte layer. Eye diagrams, bit mask analysis, trigger options and automated test scenarios support signal quality assessment, error analysis and reproducible testing.