This paper deals with the problem of robust state estimation for a class of switched linear systems with unknown inputs under average dwell time (ADT) switching, where the switching of the observers is synchronous with that of the estimated system. First, based on the feasibility of an optimization problem with linear matrix inequality (LMI) constraint, a robust sliding-mode switched observer is developed such that the asymptotic state reconstruction is guaranteed even if the switched system is with unknown inputs. Second, a reduced-order switched system which avoids the influence of unknown inputs is constructed by the technique of state transformation, and a reduced-order switched observer is proposed to estimate the continuous states of the original switched system. Next, the conditions under which a full-order switched observer exists also guarantee the existence of a reduced-order switched observer. The convergence of the state estimate is proved to be exponential by appropriate Lyapunov analysis. Finally, the simulation results confirm the predicted performance and applicability by a simplified three-tank system.
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February 2016
Research-Article
Robust Full-Order and Reduced-Order Observers for a Class of Uncertain Switched Systems
Junqi Yang,
Junqi Yang
College of Electrical Engineering
and Automation,
Henan Polytechnic University,
Jiaozuo 454000, China
e-mail: yjq@hpu.edu.cn
and Automation,
Henan Polytechnic University,
Jiaozuo 454000, China
e-mail: yjq@hpu.edu.cn
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Fanglai Zhu,
Fanglai Zhu
College of Electronics
and Information Engineering,
Tongji University,
Shanghai 201804, China
e-mail: zhufanglai@tongji.edu.cn
and Information Engineering,
Tongji University,
Shanghai 201804, China
e-mail: zhufanglai@tongji.edu.cn
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Xingguo Tan,
Xingguo Tan
College of Electrical Engineering
and Automation,
Henan Polytechnic University,
Jiaozuo 454000, China
e-mail: tanxg@hpu.edu.cn
and Automation,
Henan Polytechnic University,
Jiaozuo 454000, China
e-mail: tanxg@hpu.edu.cn
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Yunjian Wang
Yunjian Wang
College of Electrical Engineering
and Automation,
Henan Polytechnic University,
Jiaozuo 454000, China
e-mail: yunjian_wang@163.com
and Automation,
Henan Polytechnic University,
Jiaozuo 454000, China
e-mail: yunjian_wang@163.com
Search for other works by this author on:
Junqi Yang
College of Electrical Engineering
and Automation,
Henan Polytechnic University,
Jiaozuo 454000, China
e-mail: yjq@hpu.edu.cn
and Automation,
Henan Polytechnic University,
Jiaozuo 454000, China
e-mail: yjq@hpu.edu.cn
Fanglai Zhu
College of Electronics
and Information Engineering,
Tongji University,
Shanghai 201804, China
e-mail: zhufanglai@tongji.edu.cn
and Information Engineering,
Tongji University,
Shanghai 201804, China
e-mail: zhufanglai@tongji.edu.cn
Xingguo Tan
College of Electrical Engineering
and Automation,
Henan Polytechnic University,
Jiaozuo 454000, China
e-mail: tanxg@hpu.edu.cn
and Automation,
Henan Polytechnic University,
Jiaozuo 454000, China
e-mail: tanxg@hpu.edu.cn
Yunjian Wang
College of Electrical Engineering
and Automation,
Henan Polytechnic University,
Jiaozuo 454000, China
e-mail: yunjian_wang@163.com
and Automation,
Henan Polytechnic University,
Jiaozuo 454000, China
e-mail: yunjian_wang@163.com
1Corresponding author.
Contributed by the Dynamic Systems Division of ASME for publication in the JOURNAL OF DYNAMIC SYSTEMS, MEASUREMENT, AND CONTROL. Manuscript received June 8, 2015; final manuscript received November 12, 2015; published online December 15, 2015. Assoc. Editor: M. Porfiri.
J. Dyn. Sys., Meas., Control. Feb 2016, 138(2): 021004 (9 pages)
Published Online: December 15, 2015
Article history
Received:
June 8, 2015
Revised:
November 12, 2015
Citation
Yang, J., Zhu, F., Tan, X., and Wang, Y. (December 15, 2015). "Robust Full-Order and Reduced-Order Observers for a Class of Uncertain Switched Systems." ASME. J. Dyn. Sys., Meas., Control. February 2016; 138(2): 021004. https://doi.org/10.1115/1.4032067
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