基于特征映射聚类和异构选择策略的冗余容错电路设计

Redundancy Fault-tolerant Circuit Design Based on Feature Map Clustering and Heterogeneous Selection Strategy

为了提高电路系统在高电压、强电磁等复杂电磁环境中的容错抗扰能力,有效降低故障率,增强系统的鲁棒性,提出了一种特征映射和异构评估相结合的电路冗余容错设计方法。该方法基于硬件演化设计思路,结合了神经网络特征映射算法,通过分析演化得到优秀个体电路特征,并输入到神经网络进行映射聚类学习,然后通过聚类得到几类不同子电路的组集;设计了异构电路评估选择策略,研究了类间的异构度相关性,并在异构度大的类中选择最佳电路个体,作为子模块构建冗余电路系统。研究结果表明:构建的新系统在受扰或局部损伤的情况下,仍能保持较高的稳定性和容错能力;在单点短路、单点断路和随机故障仿真实验中,所设计的新异构冗余系统的最佳无故障率为92.5%,系统的平均无故障率为90.5%,比随机的冗余电路系统平均无故障率提高了6.5%,比同构冗余电路系统平均无故障率提高了26.5%,实验证明异构度高的冗余电路系统具有更好的容错抗扰能力和可靠性。研究结果为复杂电磁环境下鲁棒电路的研究提供了一种新的解决思路。

In order to improve fault-tolerant ability of circuit system in high voltage and strong electromagnetic environment, reduce the fault rate effectively, and improve the robustness of the system, we proposed a redundancy fault-tolerant circuit design method based on feature mapping and heterogeneous evaluation. The method was based on evolvable hardware design ideas, and combined with the feature mapping algorithm of neural network. By analyzing, the characteristics of excellent sub circuits were obtained and input to the neural network for mapping clustering learning, and several different circuit sets were obtained by clustering. The heterogeneous circuit evaluation and selection strategy was designed, the heterogeneous degree correlation among sub circuits were researched, and the best individual in the sets of high heterogeneous degree was selected, which was composed of the heterogeneous redundancy circuit system. The re-sults show that the newly constructed system can still maintain high stability and fault-tolerant ability under affected by interference or local damage. In the simulation experiment of single point short fault, single point disconnect fault, and random fault, the optimal fault-free rate of the new heterogeneous redundancy system designed in this paper is 92.5% and average fault-free rate is 90.5%. Compared with the random redundancy circuit system, the average fault-free rate is improved by 6.5%, and compared with the homogeneous redundancy circuit system, the average fault-free rate is improved by 26.5%, which proves that the high heterogeneous redundancy circuit system has better fault-tolerant ability and relia- bility. The research results provide a new way to solve the problem for the robust circuit under complex electromagnetic environment.