Journal
NONLINEAR ANALYSIS-HYBRID SYSTEMS
Volume 30, Issue -, Pages 240-255Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.nahs.2018.06.002
Keywords
Switched descriptor systems; Average dwell time (ADT); Unknown input observer (UIO); Unknown input reconstruction
Categories
Funding
- National Natural Science Foundation of China [61703296, 61573256, 61773201]
- Research Foundation of Suzhou University of Science and Technology [XKQ201610]
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In this paper, a reduced-order switched unknown input observer design is investigated for switched discrete-time descriptor systems. By a series of equivalent transformations, the original descriptor system with unknown inputs is transformed into a reduced-order standard system without unknown inputs, and then a switched reduced-order unknown input observer is designed by using standard switched system stability analysis techniques. Besides, the sufficient condition for the existence of the switched observer is also discussed in detail. Moreover, based on the state estimation, a delayed unknown input reconstruction method is also proposed. Finally, two simulation examples are given to show the effectiveness of the proposed methods. (C) 2018 Elsevier Ltd. All rights reserved.
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