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Fault Indicators and Adaptive Thresholds from Hybrid System Models

机译：来自混合系统模型的故障指示符和自适应阈值

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Initially, incremental bond graphs were introduced to support frequency domain sensitivity analysis of linearised time-invariant models. Subsequent publications have shown that they can be used for other purposes as well such as the determination of parameter sensitivities of analytical redundancy relations (ARRs) in symbolic form. This paper extends previous work to fault detection and isolation (FDI) from hybrid system models. In order to ensure robust FDI in the presence of parameter uncertainties and to avoid false alarms of faults reported to a diagnosis system, properly chosen thresholds for the time evolution of residuals of ARRs are needed. Hybrid systems exhibit several operation modes. Distinctive continuous time behaviour in different operation modes require adapted thresholds for fault indicators. The paper shows how an incremental bond graph can be used to set up thresholds for residuals that account for parameter uncertainties as well as for discrete mode changes. The approach is illustrated by means of an example easy to survey.
机译：最初，引入增量键合图以支持线性时间不变模型的频域灵敏度分析。随后的出版物表明它们可以用于其他目的，例如以象标形式确定分析冗余关系（ARR）的参数敏感性。本文将以前的工作延伸到混合系统模型的故障检测和隔离（FDI）。 In order to ensure robust FDI in the presence of parameter uncertainties and to avoid false alarms of faults reported to a diagnosis system, properly chosen thresholds for the time evolution of residuals of ARRs are needed.混合系统表现出几种操作模式。不同操作模式下的独特连续时间行为需要适应的故障指示符阈值。本文展示了如何使用增量键合图来为应参数不确定性以及离散模式的变化设置账户的残差来设置阈值。通过易于调查的示例来说明该方法。

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