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Ultra Long-Life Avionics Architecture

B&A Engineering principal engineer Ali Bakhshi and other fellow engineers wrote an article about ultra long life avionics architechture. This article explains achieving survival and reliability in ultra long life missions & how designing techniques need to handle the predominant failure mode. Conventional designs need excessive redundancy to achieve the required reliability.The main object of the article is to present a new approach to design a more efficent fault-tolerant avionics system architecture.
Excerpted:
ABSTRACTFor survival and achieving reliability in ultra long-life missions, fault tolerant design techniques need to handle the predominant failure mode, which is the wear-out of components. Conventional design methodologies will need excessive redundancy to achieve the required reliability. The objective of this paper is to present a new approach to design a more efficient fault-tolerant avionics system architecture that requires significantly fewer redundant components. This architecture uses generic function blocks that can be programmed, in-flight, to replace a wide variety of components. Effectively, each individual generic block is almost equivalent to an entire redundant string of components used in conventional approach. As a result, the ultra long-life system can achieve much higher level of reliability while carrying far fewer components. Due to the programmable nature of generic redundant blocks, the physical location of a specific component is not pre-determined and, accordingly, wireless interconnection is employed to provide the necessary flexibility in connectivity. A test bed of this architecture is being developed at the Jet Propulsion Laboratory.Read the entire paper: Ultra Long-Life Avionics.pdf

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