基于连接矩阵的潜在通路定性分析方法

Sneak Circuit Qualitative Analysis Method Based on Connection Matrix

摘要:

对电路图中的电气元件进行定性建模,根据建立的元件模型,按照电流方向将电路图转化为有向图的形式,进而构造出图的连接矩阵,利用其代数余子式计算有向图中从电源正端到地端的所有通路路径,并与该电路图设计的功能支路进行对比确定电路是否存在潜在通路；相比于传统潜在通路分析的邻接矩阵法,该方法不仅能判别电路中是否存在潜在通路,而且能确定潜在通路的所有导通路径信息；在此基础上,提出了改进原始电路图以达到消除潜在通路影响的方法,文中采用某汽车点火电路为例,利用Capital Harness System(CHS)软件仿真分析,验证该方法的正确性与可行性。

Abstract:

The electrical components were qualitative modeled in the circuit diagram. To get the connection matrix of the circuit diagram, it’s necessary to transform the circuit diagram to directed graph by the current direction on the basis of the modeled components. All the paths in the directed graph from the battery positive terminal to ground could be calculated by using its algebraic cofactor, and compared the paths with the function branches that were designed for the circuit graph. Compared to the adjacency matrix method used in traditional sneak circuit analysis, this method could not only judge whether there were sneak circuits in the circuit graph, but got all the conduction paths information of the sneak circuits. On this basis, the method that was designed for wiping the effects of the sneak circuits was proposed to improve the original circuit graph. The validity and feasibility of the method has been confirmed experimentally in the car ignition circuit by using Capital Harness System(CHS).