caa a22 4500 60620637X CHVBK 20210128101011.0 cr unu---uuuuu 210128e20150501xx s 000 0 eng 10.1007/s00034-014-9918-y doi (NATIONALLICENCE)springer-10.1007/s00034-014-9918-y Exact State Estimation for Linear Systems with Unbounded Disturbances [Elektronische Daten] [Fei Li, Guorong Zhao, Jingli Huang] A finite-time observer is designed for linear invariant systems in the presence of unknown inputs or disturbances with unavailable upper bound. The main condition for designing the observer is strongly detectability. Geometric control theory is used to decompose the given system into two parts: strongly observable subsystem and strongly detectable subsystem. Through a series of transformations, the former can be partitioned into two parts: affected and unaffected by unknown inputs (UI-free and UI-dependent), and then the states can be exactly estimated via time-delayed observer in pre-defined time. The nonstrongly observable subsystem can be observed asymptotically. Without the upper bound of disturbances, the observer ensures that the convergence time can be set arbitrarily. A numerical example illustrates the effective of the proposed estimation schemes. Springer Science+Business Media New York, 2014 Strongly detectability nationallicence Strongly observability nationallicence Finite-time nationallicence Time-delayed observer nationallicence Li Fei Department of Control Engineering, Naval Aeronautical and Astronautical University, Yantai, China aut Zhao Guorong Department of Control Engineering, Naval Aeronautical and Astronautical University, Yantai, China aut Huang Jingli Department of Control Engineering, Naval Aeronautical and Astronautical University, Yantai, China aut Circuits, Systems, and Signal Processing Springer US; http://www.springer-ny.com 34/5(2015-05-01), 1519-1533 0278-081X 34:5<1519 2015 34 34 https://doi.org/10.1007/s00034-014-9918-y text/html Onlinezugriff via DOI BK010053 XK010053 XK010000 Metadata rights reserved Springer special CC-BY-NC licence nationallicence 1 research-article jats NATIONALLICENCE NATIONALLICENCE NL-springer NATIONALLICENCE 856 40 https://doi.org/10.1007/s00034-014-9918-y text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Li Fei Department of Control Engineering, Naval Aeronautical and Astronautical University, Yantai, China aut NATIONALLICENCE 700 1- Zhao Guorong Department of Control Engineering, Naval Aeronautical and Astronautical University, Yantai, China aut NATIONALLICENCE 700 1- Huang Jingli Department of Control Engineering, Naval Aeronautical and Astronautical University, Yantai, China aut NATIONALLICENCE 773 0- Circuits, Systems, and Signal Processing Springer US; http://www.springer-ny.com 34/5(2015-05-01), 1519-1533 0278-081X 34:5<1519 2015 34 34