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2005 | 15 | 4 | 431-446
Tytuł artykułu

Observer design for systems with unknown inputs

Treść / Zawartość
Warianty tytułu
Języki publikacji
EN
Abstrakty
EN
Design procedures are proposed for two different classes of observers for systems with unknown inputs. In the first approach, the state of the observed system is decomposed into known and unknown components. The unknown component is a projection, not necessarily orthogonal, of the whole state along the subspace in which the available state component resides. Then, a dynamical system to estimate the unknown component is constructed. Combining the output of the dynamical system, which estimates the unknown state component, with the available state information results in an observer that estimates the whole state. It is shown that some previously proposed observer architectures can be obtained using the projection operator approach presented in this paper. The second approach combines sliding modes and the second method of Lyapunov resulting in a nonlinear observer. The nonlinear component of the sliding mode observer forces the observation error into the sliding mode along a manifold in the observation error space. Design algorithms are given for both types of observers.
Rocznik
Tom
15
Numer
4
Strony
431-446
Opis fizyczny
Daty
wydano
2005
otrzymano
2005-06-01
poprawiono
2005-09-01
Twórcy
autor
  • Department of Mathematical Sciences, San Diego State University,, San Diego, CA 92182, USA
  • School of Electrical and Computer Engineering Purdue University, West Lafayette, IN 479072035, USA
Bibliografia
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Typ dokumentu
Bibliografia
Identyfikatory
Identyfikator YADDA
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