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New results in robust functional state estimation using two sliding mode observers in cascade
Author(s) -
Kee Chew Yee,
Tan Chee Pin,
Ng Kok Yew,
Trinh Hieu
Publication year - 2014
Publication title -
international journal of robust and nonlinear control
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.361
H-Index - 106
eISSN - 1099-1239
pISSN - 1049-8923
DOI - 10.1002/rnc.2973
Subject(s) - cascade , control theory (sociology) , observer (physics) , state observer , transformation (genetics) , scheme (mathematics) , mode (computer interface) , state (computer science) , coordinate system , computer science , estimation , sliding mode control , mathematics , algorithm , nonlinear system , engineering , control (management) , artificial intelligence , physics , mathematical analysis , biochemistry , chemistry , systems engineering , quantum mechanics , chemical engineering , operating system , gene
SUMMARY This paper presents a functional observer scheme using two sliding mode observers in cascade. A coordinate transformation is performed on the system such that existing sliding mode observer theory can be directly applied to achieve functional state estimation. The necessary and sufficient existence conditions for the scheme (in terms of the original system matrices) are also investigated, and they are found to be less stringent than earlier work on functional state estimation using one sliding mode observer; this could have benefits in terms of cost and simplicity. A numerical example verifies the effectiveness of the scheme. Copyright © 2013 John Wiley & Sons, Ltd.