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Robust Nonlinear Observer for Lipschitz Nonlinear Systems Subject to Disturbances

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2 Author(s)
Min-Shin Chen ; Nat. Taiwan Univ., Taipei ; Chi-Che Chen

This note proposes a robust nonlinear observer for systems with Lipschitz nonlinearity. The proposed nonlinear observer, whose linear part adopts the linear LTR observer design technique, has two important advantages over previous designs. First, the new observer does not impose the small-Lipschitz-constant condition on the system nonlinearity, nor other structural conditions on the system dynamics as in the existing observer designs. Second, it is robust in the sense that its state estimation error decays to almost zero even in the face of large external disturbances.

Published in:

Automatic Control, IEEE Transactions on  (Volume:52 ,  Issue: 12 )

Date of Publication:

Dec. 2007

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