Abstract
This paper studies the problem of designing the unknown input observers (UIOs) for fractional order one-sided Lipchitz nonlinear systems. By introducing a continuous frequency distributed equivalent model and using the matrix generalized inverse approach, sufficient conditions for asymptotic stability of the observer error dynamic systems are presented, which guarantee the existence of the full-order and reduced-order UIOs. All the conditions are obtained in terms of linear matrix inequality (LMI). Furthermore, we show that the obtained results can be applied to a fractional order electrical circuit with the unknown input signal. Two examples are given to demonstrate the applicability of the proposed approach.
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Recommended by Associate EditorYang Tang under the direction of Editor Hamid Reza Karimi. This work is supported by National Natural Science Foundation of China (61473173), Major International (Regional) Joint Research Project of the National Natural Science Foundation of China (NSFC)(61320106011).
Tao Zhan is curretly a Ph.D. Candidate in School of Mathematics, Shandong University, Jinan, P. R. China. She is an exchange Ph.D student from 2017 to 2018 in Department of Applied Mathematics, University of Waterloo, Canada. Her research interests include nonlinear fractional order systems, singular system and impulsive control.
Jiaming Tian received the B.Sc. degree in information and computing science from the College of Science, Nanjing University of Aeronautics and Astronautics, Nanjing, China, in June 2014. Since September 2014, he has been working toward the Ph.D. degree on analysis and synthesis for singular Markov jump systems, in the School of Mathematics, Shandong University, Jinan, China. His research interests include stability analysis, nonlinear control and observer design for singular Markov jump systems.
Shuping Ma was born in Rizhao, China in 1970. She received her B.S. degree in Mathematics from Shandong University, China, in 1992, and, her M.S. and Ph.D. degrees in Mathematics and System Science of Shandong University, China, in 1997 and 2000, respectively. She joined School of Mathematics at Shandong University in 2000, where she is currently a professor. Her research interests include singular systems, time-delay systems, Markov jump systems, robust control and sliding mode control.
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Zhan, T., Tian, J. & Ma, S. Full-order and Reduced-order Observer Design for One-sided Lipschitz Nonlinear Fractional Order Systems with Unknown Input. Int. J. Control Autom. Syst. 16, 2146–2156 (2018). https://doi.org/10.1007/s12555-017-0684-z
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DOI: https://doi.org/10.1007/s12555-017-0684-z