When addressing guarantee problems, legal responsibility is determined soon after examining the basis explanation for the defective portion. Legal responsibility is usually divided into the subsequent locations:
An electromagnetic interference (EMI) occasion disrupts equally redundant CAN interaction channels at the same time for the reason that each transceivers are on precisely the same PCB with inadequate shielding.
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The cascading failure analysis examines how a fault in a single factor can propagate to another. For each interface in between components within the couple, the analysis evaluates what failure modes of element A could propagate through the interface to induce a failure in ingredient B, irrespective of whether security limitations exist to include the fault within ingredient A, and just what the consequence of fault propagation might be on the protection perform.
EMC – MITIGATED: independent floor planes, EMC filtering on Just about every channel’s crucial signals. Semiconductor know-how – MITIGATED: TC397 and TC375 are different product households (diverse silicon designs), furnishing technologies variety. Software program toolchain – MITIGATED: both of those channels compiled with capable compiler; monitoring channel uses diverse algorithm from primary channel (algorithmic variety).
A CAN transceiver failure in dominant method blocks all CAN communication – stopping safety-relevant diagnostic messages from becoming transmitted by more info other ECUs on exactly the same bus.
A application exception within a QM application SWC corrupts the shared memory location utilized by an ASIL D safety SWC (spatial interference – if MPU security is absent or misconfigured).
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The application of devices evaluation and tests processes range between passenger autos to heavy obligation industrial trucks and machinery.
A short circuit in the motor driver IC results in overcurrent about the shared electrical power bus – which damages the checking MCU’s electricity supply enter, disabling the monitoring function.
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Recurring equivalent functions in numerous branches of the fault tree suggest dependent failure probable. The DFA analyst need to systematically more info evaluation the FMEA and FTA outputs for these indicators.
A shared energy offer voltage regulator fails – each the key MCU and also the monitoring MCU eliminate energy concurrently as they both rely on the exact same source.