WCCI'08 Proceedings of the 2008 IEEE world conference on Computational intelligence: research frontiers
Robustness of evolvable hardware in the case of fault and environmental change
ROBIO'09 Proceedings of the 2009 international conference on Robotics and biomimetics
IEEE Transactions on Very Large Scale Integration (VLSI) Systems
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Evolvable hardware (EHW) combines the powerful search capability of evolutionary algorithms with the flexibility of reprogrammable devices, thereby providing a natural framework for reconfiguration. This framework has generated an interest in using EHW for fault-tolerant systems because reconfiguration can effectively deal with hardware faults whenever it is impossible to provide spares. But systems cannot tolerate faults indefinitely, which means reconfiguration does have a deadline. The focus of previous EHW research relating to fault-tolerance has been primarily restricted to restoring functionality, with no real consideration of time constraints. In this paper, we are concerned with EHW performing reconfiguration under deadline constraints. In particular, we investigate reconfigurable hardware that undergoes intrinsic evolution. We show that fault recovery done by intrinsic reconfiguration has some restrictions, which designers cannot ignore.