Design of Heterogeneous Evaluation Method for Redundant Circuits

Fault-tolerant mechanisms have been an essential part of the electronic equipment in extreme environments such as high voltage, extreme temperature and strong electromagnetic environment etc. Accordingly, how to improve the robustness and disturbance rejection performance of the circuit has become the primary problem in recent years. In this paper, a heterogeneous evaluation method based on relational analysis is proposed. It uses genetic algorithm and evolutionary hardware to get the required sub-circuit structures and uses relational strategy to evaluate heterogeneous degree of redundant circuit system. Finally, the sub-structures with large heterogeneous degree are selected to build redundant circuit system. In the experiments, we designed short-circuit fault and parameter drift fault to validate the heterogeneous evaluation method. The experimental results show this method can not only enhance the heterogeneous degree, but also maintain high robustness. Compared with random heterogeneous redundant system and homogeneous redundant system, the Average Fault-free Probability of redundant fault-tolerant circuit system based on relational method is 8.9% and 21.7% higher respectively in short-circuit fault experiments, and it is 9.1% and 23.9% higher respectively in parameter drift fault experiments.