What is it about?

Current observer schemes for non-infinitely observable descriptor systems require stringent mathematical conditions to work. The use of two sliding mode observers in cascade (versus a single observer) relaxes these conditions, allowing the scheme to be applicable to more systems. This paper details the estimation of states and faults affecting a non-infinitely observable descriptor system, and the estimates converge on the actual values in finite time.

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Why is it important?

The application of observer schemes are limited by the mathematical conditions required for their feasibility. This work greatly expands the applicability of observer schemes, particularly for non-infinitely observable descriptor systems.

Perspectives

The findings were particularly interesting because it can be shown that all estimates converge on the actual values in finite time, as compared to asymptotically in many other works.

Dr Joseph Chang Lun Chan
Chonbuk National University

Read the Original

This page is a summary of: State and fault estimation for a class of non-infinitely observable descriptor systems using two sliding mode observers in cascade, Journal of the Franklin Institute, February 2019, Elsevier, DOI: 10.1016/j.jfranklin.2019.01.044.
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