Sensor Fault Diagnosis

被引:35
作者
Reppa, Vasso [1 ]
Polycarpou, Marios M. [2 ]
Panayiotou, Christos G. [2 ]
机构
[1] Univ Paris Saclay, Univ Paris Sud, Lab Signals & Syst, L2S,UMR CNRS 8506,Cent Supelec CNRS, Paris, France
[2] Univ Cyprus, KIOS Res Ctr Intelligent Syst & Networks, Elect & Comp Engn Dept, Nicosia, Cyprus
来源
FOUNDATIONS AND TRENDS IN SYSTEMS AND CONTROL | 2016年 / 3卷 / 1-2期
关键词
D O I
10.1561/2600000007
中图分类号
TP [自动化技术、计算机技术];
学科分类号
0812 ;
摘要
This tutorial investigates the problem of the occurrence of multiple faults in the sensors used to monitor and control a network of cyber-physical systems. The goal is to formulate a general methodology, which will be used for designing sensor fault diagnosis schemes with emphasis on the isolation of multiple sensor faults, and for analyzing the performance of these schemes with respect to the design parameters and system characteristics. The backbone of the proposed methodology is the design of several monitoring and aggregation cyber agents (modules) with specific properties and tasks. The monitoring agents check the healthy operation of sets of sensors and infer the occurrence of faults in these sensor sets based on structured robustness and sensitivity properties. These properties are obtained by deriving analytical redundancy relations of observer-based residuals sensitive to specific subsets of sensor faults, and adaptive thresholds that bound the residuals under healthy conditions, assuming bounded modeling uncertainty and measurement noise. The aggregation agents are employed to collect and process the decisions of the agents, while they apply diagnostic reasoning to isolate combinations of sensor faults that have possibly occurred. The design and performance analysis methodology is presented in the context of three different architectures: for cyber-physical systems that consist of a set of interconnected systems, a distributed architecture and a decentralized architecture, and for cyber-physical systems that are treated as monolithic, a centralized architecture. For all three architectures, the decomposition of the sensor set into subsets of sensors plays a key role in their ability to isolate multiple sensor faults. A discussion of the challenges and benefits of the three architectures is provided, based on the system scale, the type of system nonlinearities, the number of sensors and the communication needs. Lastly, this tutorial concludes with a discussion of open problems in fault diagnosis.
引用
收藏
页码:I / +
页数:251
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