基于矩独立重要度的电路系统容错设计方法

电路系统在运行过程中不可避免会发生失效，而容错设计可以有效降低失效风险。传统的电路系统容错方法主要是根据设计人员经验认知对电路系统进行分析改进，但是通常难以准确确定对系统性能影响显著的重要元器件。因此，提出了一种基于重要度分析的电路系统容错设计方法。首先，提出了电路系统矩独立重要度定义与计算方法，以对电路系统中各元器件的矩独立重要度进行计算和排序；然后，给出了冗余系数与冗余次数的定量关系，并提出重要度-冗余系数的映射准则，以此为基础即可实现电路系统的最佳容错设计；最后，以某空间电源稳压器电路为案例，验证了所提方法的有效性。所提基于矩独立重要度的电路系统容错设计方法对改进电路系统容错能力、提高电路系统可靠性有重要意义。 

Fault-tolerant design method for circuit system based on moment-independent importance

Circuit failure is inevitable during operation and fault-tolerant design can significantly reduce the risk of failure. The traditional fault-tolerant method of circuit system is to analyze and improve the system mainly based on the designer's experience and cognition. However, it is usually difficult to determine accurately the important components that have significant impact on the system performance. Therefore, a fault-tolerant design method of circuit system based on importance analysis is proposed in this paper. Firstly, the definition and calculation method of moment-independent importance of circuit system are proposed to calculate and rank the moment-independent importance of components in the circuit system. Secondly, the quantitative relationship between redundancy coefficient and redundancy number is introduced, and the mapping rule of importance-redundancy coefficient is developed, based on which fault-tolerant design of circuit system can be optimized. Finally, a space power regulator is taken as an example to verify the effectiveness of the proposed method. The fault-tolerant design method of circuit system based on moment-independent importance presented in this paper is of great significance for improving the fault-tolerant ability of circuit system and improving the reliability of circuit system.