Cost Reduction via Common Onboard Software
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Cost Reduction↗
Engineering topics
Rohr, John A.
Publications and source records attributed to Rohr, John A..
Mission Operations Cost Reduction by Software Inheritance
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Software Inheritance↗
Fault-tolerant parallel processors for avionics with reduced maintenance
Architectural issues and approaches for implementing fault-tolerant parallel processors in avionics systems and other dedicated applications requiring high levels of dependability are discussed. For these systems it is desirable to provide both a high degree of fault tolerance and a system that can operate for extended periods of time without external maintenance. With current technology it is possible to operate dependably for months between maintenance events. The longer-term goal should be maintenance-free operation (a computer that outlasts its host system). It is argued that new high-density packaging techniques may make this type of long-life fault-tolerant design an attractive choice in controlling the life-cycle costs of the next generation of systems.
Rennels, David A.↗
On the feasibility of a spaceborne fault-tolerant hypercube
The feasibility of implementing a fault-tolerant hypercube architecture for space applications is discussed. Node-level architectures and designs are considered and a first-order reliability model is presented. It is shown how error recovery can be implemented using program rollback or roll-forward techniques. Shared memory augmentations to the message-passing structure can be used to get around the inefficiencies of multicomputers to provide efficient use of hardware to achieve the needed reliabilities while maintaining performance.
Rennels, David A.↗