Quantitative fault estimation for a class of nonlinear systems

K. Vijayaraghavan, R. Rajamani, Jozsef Bokor

Research output: Chapter in Book/Report/Conference proceedingConference contribution

2 Scopus citations


This paper develops a methodology for actuator fault diagnostics and quantitative estimation of fault signals in a class of nonlinear systems. The class of nonlinear systems considered is one in which the nonlinearity is an incremental quadratic type of nonlinearity that includes Lipschitz, positive real and sector nonlinear functions. The methodology provides for both state estimation and fault vector estimation. An LMI procedure can be utilized for explicit computation of the observer gains. The procedure developed can also be specialized to linear time invariant systems. Compared to previous results for LTI systems, the procedure developed herein does not require the LTI system to be minimum phase. The use of the developed methodology is demonstrated through an illustrative example of a real world physical application.

Original languageEnglish (US)
Title of host publicationProceedings of the 2006 American Control Conference
PublisherInstitute of Electrical and Electronics Engineers Inc.
Number of pages6
ISBN (Print)1424402107, 9781424402106
StatePublished - 2006
Event2006 American Control Conference - Minneapolis, MN, United States
Duration: Jun 14 2006Jun 16 2006

Publication series

NameProceedings of the American Control Conference
ISSN (Print)0743-1619


Other2006 American Control Conference
Country/TerritoryUnited States
CityMinneapolis, MN


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