Fault-tolerant evolvable hardware using FPGAs

In extreme environment, the circuit system is bombarded by harmful radiation and will be damaged. The traditional Fault-Tolerance methods cannot deal well with the recovery I requirement. Evolvable Hardware (EHW) is an alternative method for logic design and EHW can change its architecture and behaviour dynamically and autonomously according to the outer environment. The paper looks for ways of increasing the circuit's reliability with the help of evolutionary techniques and proposes the use of EHW in the Triple Modular Redundancy (TMR) fault-tolerant circuit design to achieve Evolutionary Fault Repair TMR fault-tolerance circuit. This kind of circuit design can realize self-repair fault-tolerance function and it is applicable to the high-reliability and uninterrupted system in the extreme environment such as space radiation and higher temperature.