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Indexed by:期刊论文

Date of Publication:2017-07-01

Journal:JOURNAL OF CIRCUITS SYSTEMS AND COMPUTERS

Included Journals:SCIE、EI、Scopus

Volume:26

Issue:7

ISSN No.:0218-1266

Key Words:Fault-tolerant; real-time; evolvable hardware; configuration library; virtual reconfiguration circuit

Abstract:The evolvable hardware (EHW) is widely used in the design of fault-tolerant system. Fault-tolerant system is really a real-time system, and the recovery time is necessary in fault detection and recovery. However, when applying EHW, real-time characteristic is usually ignored. In this paper, a fault-tolerant strategy based on EHW is proposed. The recovery time, predicted by the fault tree analysis (FTA), is considered as a constraint condition. A configuration library is set up in the design phase to accelerate the repair process of the anticipated faults. An evolvable algorithm ( EA) based on similarity is applied to evolve the repair circuit for the unanticipated faults. When the library reaches the upper, the target system is reconfigured by the EA-repair technology. Extensive experiments are conducted to show that our method can improve the fault-tolerance of the system while satisfying the real-time requirement on FPGA platform. In a long run system, our method can keep a higher fault recovery rate.