Multi-objective On-line Evolution And Design Of Fault-tolerant System With Different Structures Of Digital Circuit

Evolvable hardware is an effective method which simulates the biological evolutionary principle to implement the circuit design automation. Evolvable hardware has an important application in the field of the aeronautics and astronautics because it can accomplish the self-adaptation and self-repair by on-line evolution. The main research contents of this paper are as follows:1. The multi-objective evolutionary design of digital circuit was researched. A multi-objective evolutionary algorithm based on constraint method was improved. The problem of cooperative optimization design of the performance, the active logical gates and the time-delay of circuits was solved during the evolution process. Aiming at the disadvantage of the slow convergence speed of the multi-objective evolutionary design, the growth evolution strategy was used. The convergence speed of multi-objective evolutionary design was increased because the excellent genes were locked.2. The function level evolution design of digital circuit was researched. The medium size digital circuit was implemented through decomposing aim circuit to smaller circuits gradually. The convergence speed of function level evolution was raised by the growth evolution strategy.3. The design methods of redundancy fault-tolerant system with different structures were researched. The fault-tolerant performances of the systems between the same structures and the different structures were compared. The"active gates"evaluation method was improved. The"topological structures"evaluation method was designed. The performances of the two methods were analyzed by the example.4. The multi-objective optimization design technology of redundancy fault-tolerant system was researched. Aiming at the fault-tolerant influence of the logical gates, the fault-tolerant performance of the system was enhanced by multi-objective optimization design method.