Sensor fault diagnostics for a class of non-linear systems using linear matrix inequalities

Rajesh Rajamani, Ankur Ganguli

Research output: Contribution to journalArticlepeer-review

51 Scopus citations


This paper develops a systematic approach to fault diagnostic system design for sensor health monitoring in Lipschitz non-linear systems. The methodology applies to non-linear systems with three or more sensors in which the state is observable through any one of the sensor measurements. Two major issues are addressed in the paper - observer design for the non-linear system to ensure directional growth of residues for failure identification and use of linear matrix inequalities for explicit design of the observer gain. The use of the methodology is demonstrated through an illustrative example.

Original languageEnglish (US)
Pages (from-to)920-930
Number of pages11
JournalInternational Journal of Control
Issue number10
StatePublished - Jul 10 2004

Bibliographical note

Funding Information:
This research was supported in part by a grant from the National Science Foundation (NSF CAREER Award: CMS 9983946). The authors would like to thank the anonymous reviewer who suggested that the LMI formulation in the original version of the paper was too conservative and therefore motivated the LMI formulation in } 5.


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