Department of Electrical Engineering, Sahand University of Technology, P.O. Box 51336-1996, Sahand, Tabriz, Iran
Academic Editor: Oleg V. Gendelman
Copyright © 2011 M. J. Khosrowjerdi. This is an open access article distributed under the
Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
We extend existing theory on robust nonlinear observer
design to the class of nonlinear Lipschitz systems where the systems
are subject to sensor faults and disturbances. The designed observer
is used for robust reconstruction of fault signals. Allowing bounded
unknown disturbances to model system uncertainties, it is shown that
by adjusting a design parameter we can trade off between fault reconstruction
and disturbance attenuation. An LMI procedure solvable
using commercially available softwares is presented. Two examples are
presented to illustrate the application of the results.