面向民用飞机排故的增强型符号有向图
发布时间：2019-02-22 13:52
【摘要】：针对民用飞机故障的动态特性及维修体制,在符号有向图(SDG)模型中引入动态元素,并融合系统结构模型,提出一种结构和参数能随工况变化而调整的增强型有向图(ESDG)模型。进而提出基于故障依赖矩阵的相容根树搜索算法与分层诊断策略,能解决实际排故中常常因部分状态未测量而造成诊断信息缺失的问题。该方法能满足分级维修中不同诊断精度的要求。多个工况的综合诊断进一步提高了推理分辨率。最后以某民机发动机引气系统为实例说明了该方法的有效性。
[Abstract]:In view of the dynamic characteristics and maintenance system of civil aircraft faults, the dynamic elements are introduced into the symbolic directed graph (SDG) model, and the system structure model is fused. An enhanced directed graph (ESDG) model with variable structure and parameters is proposed. Furthermore, a consistent root tree search algorithm based on fault dependency matrix and a hierarchical diagnosis strategy are proposed, which can solve the problem of lack of diagnosis information caused by unmeasured partial states in actual troubleshooting. This method can meet the requirements of different diagnostic accuracy in hierarchical maintenance. The comprehensive diagnosis of multiple working conditions further improves the reasoning resolution. Finally, the effectiveness of the method is illustrated by an example of a civil aircraft engine exhaust system.
【作者单位】： 上海工程技术大学航空运输学院;上海工程技术大学汽车工程学院;
【基金】：国家自然科学基金(51465047) 航空科学基金(2014ZD56009)~~
【分类号】：V267
本文编号：2428292
[Abstract]:In view of the dynamic characteristics and maintenance system of civil aircraft faults, the dynamic elements are introduced into the symbolic directed graph (SDG) model, and the system structure model is fused. An enhanced directed graph (ESDG) model with variable structure and parameters is proposed. Furthermore, a consistent root tree search algorithm based on fault dependency matrix and a hierarchical diagnosis strategy are proposed, which can solve the problem of lack of diagnosis information caused by unmeasured partial states in actual troubleshooting. This method can meet the requirements of different diagnostic accuracy in hierarchical maintenance. The comprehensive diagnosis of multiple working conditions further improves the reasoning resolution. Finally, the effectiveness of the method is illustrated by an example of a civil aircraft engine exhaust system.
【作者单位】： 上海工程技术大学航空运输学院;上海工程技术大学汽车工程学院;
【基金】：国家自然科学基金(51465047) 航空科学基金(2014ZD56009)~~
【分类号】：V267
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