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Flight Critical Systems Software Certification Initiative A Presentation to SAE Aerospace Control ... - page 7 / 24

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Mixed Criticality Challenge

How can we separate the mission and flight critical functionality as to guarantee safety?

SOA:  Middleware that provides time/space partitioning (ARINC 653).

Issue:  

Both Criticalities use common HW resources (i.e. processors, backplanes,  busses etc); how do we determine PLOC and fault tolerance?

Understand failure mechanisms for partitioning

Non-critical function must not take out shared resources…Or the probability of its occurrence is predictable…

Need guarantee on fault tolerance

A

A

A

B

B

C

Processors

X

X

X

Answer may reside in a SW/HW architecture specifically designed for mixed operation

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