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Observer design for nonlinear descriptor systems (DAEs) - a review

Discussion about our recent research publication:
Tripathi, M., Moysis, L., Gupta, M. K., Fragulis, G. F., & Volos, C. (2024). Observer Design for Nonlinear Descriptor Systems: A Survey on System Nonlinearities. Circuits, Systems, and Signal Processing, 43(5), 2853-2872.
https://link.springer.com/article/10.1007/s00034-024-02617-1

Descriptor systems are also known as differential-algebraic equations, DAEs, singular systems, and generalized state space systems.

In general, the construction of observers for nonlinear descriptor systems depends on the solvability of a linear matrix inequality involving system matrices, and it is based on the system’s nonlinearity. Therefore, the type of nonlinearity present in the system heavily affects the observer design process. There are significant developments in the literature for observer design for descriptor systems with various types of nonlinearity. Motivated by this, the current work reviews the literature on observer design for nonlinear descriptor systems with an extensive discussion on the type of nonlinearities that are considered. Here, an analysis and the comparison on the most common nonlinearities is presented, providing a roadmap to all researchers in the field. Furthermore, less common nonlinearities have been identified, presenting under-explored areas within the literature, and can open new domains for future research.

Matlab codes:
https://uk.mathworks.com/matlabcentral/fileexchange/161256-nonlinear-descriptor-observer-for-chaos-synchronization?s_tid=srchtitle
https://uk.mathworks.com/matlabcentral/fileexchange/161261-descriptor-observer-for-chaos-anti-synchronization?s_tid=srchtitle
https://uk.mathworks.com/matlabcentral/fileexchange/161516-nonlinear-observer-for-descriptor-systems-with-iqc?s_tid=srchtitle
https://uk.mathworks.com/matlabcentral/fileexchange/155517-example-of-state-space-observer?s_tid=srchtitle

Social:
https://www.linkedin.com/in/moysislazaros/
https://www.researchgate.net/profile/Lazaros-Moysis?ev=hdr_xprf

#controlsystems #controltheory #observers #observerdesign #descriptorsystems #daes #nonlinearsystems #nonlinear #linearsystems #statespace #automaticcontrol #controlengineering #feedback #kalman #Lipschitz #observability #matlab #lmi #appliedmathematics

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