arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1012.4845eess.SYcs.SY
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基于有向因子图的模式切换卫星电源系统故障诊断模型构建

Directed factor graph based fault diagnosis model construction for mode switching satellite power system

School of Astronautics, Harbin Institute of Technology(哈尔滨工业大学航天学院)

Xiaolei Zhang, Yi Shen, Zhenhua Wang

AI总结:

针对卫星电源系统的非线性与模式切换特性,提出基于混合键合图模型构建有向因子图结构,通过定性方程与因果路径分析建立假设与证据间的因果关系,实现故障诊断。

摘要:

卫星电源系统是一个复杂、高度互联的混合系统,表现出非线性和模式切换行为。有向因子图是一种利用概率推理技术进行故障诊断的推理模型。提出了一种基于混合键合图模型构建有向因子图结构的新方法。系统组件状态及其故障症状分别被视为假设和证据。通过混合键合图模型上的定性方程和因果路径分析,识别并总结了假设与证据之间的因果关系。以卫星电源系统的供电模块为例,验证了所提方法的可行性和有效性。

英文摘要:

Satellite power system is a complex, highly interconnected hybrid system that exhibit nonlinear and mode switching behaviors. Directed factor graph is an inference model for fault diagnosis using probabilistic reasoning techniques. A novel approach for constructing the directed factor graph structure based on hybrid bond graph model is proposed. The system components status and their fault symptoms are treated as hypothesis and evidences respectively. The cause-effect relations between hypothesis and evidences are identified and concluded though qualitative equations and causal path analysis on hybrid bond graph model. A power supply module of a satellite power system is provided as case study to show the feasibility and validity of the proposed method.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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