北京航空航天大学学报

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基于键合图模型的传感器布局方法

凌牧1,袁海文2   

  1. 1. 北京航空航天大学
    2. 北京航空航天大学自动化科学与电气工程学院检测系
  • 收稿日期:2015-06-17 修回日期:2015-09-18 发布日期:2015-10-14
  • 通讯作者: 凌牧
  • 基金资助:
    国家自然科学基金

Sensor placement method based on Bond graph models

  • Received:2015-06-17 Revised:2015-09-18 Published:2015-10-14

摘要: 为研究传感器布局对于故障诊断性能的影响,使用键合图方法对系统建模。通过在键合图模型中设置虚拟传感器模拟测点,利用键合图的结构信息和因果关系约束推导出一组解析冗余关系式,即系统残差,通过分析残差、故障及传感器配置的关系,提出了一种基于满足故障检测性和隔离性要求的传感器布局方法,在最大限度满足系统诊断性能前提下选择数量最少的传感器配置方案。最后,以同步发电机为例建立键合图传感器布局模型,通过残差推导其结构故障特征矩阵以及传感器特征矩阵,并对所提出的传感器优化布局方法进行验证,得出在参数性故障检测和隔离性能最高前提下的传感器配置方案。

关键词: 传感器布局, 键合图, 故障检测和隔离, 同步发电机, 参数性故障

Abstract: In order to study the influence of sensor placement on fault diagnosis, a new sensor placement method based on bond graph model was proposed. A group of virtual sensor test points were set in bond graph model, then the information of bond graph structure and causality constraints were used to deduce a set of analytical redundancy relations, namely system residuals. The relationships between residuals and faults and sensor placement configuration were analysed, this sensor placement method can meet the requirements of system fault detection and isolation performance. The sensor placement configuration with the minimum number of sensors under the premise of maximize system diagnosis performance was chose. Finally, the synchronous generator was used as an example to establish the sensor placement algorithm. Residual analysis was used to derive the structure fault feature matrix and the sensor feature matrix. The proposed sensor placement optimization algorithm was verified by this example, and the experimental results show that the final sensor placement configuration can meet the requirements of maximum parameter faults detection and isolation performance.

Key words: sensor placement, bond graph, fault detection and isolation, synchronous generator, parametric fault

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