Encyclopedia of Systems and Control

Living Edition
| Editors: John Baillieul, Tariq Samad

Low-Power High-Gain Observers

Living reference work entry
DOI: https://doi.org/10.1007/978-1-4471-5102-9_100070-1


This entry deals with a class of nonlinear high-gain observers referred to as “low-power” due to the fact that the high-gain parameter is powered only up to 2 regardless of the dimension of the observed system, on the contrary of conventional high-gain observers in which the high-gain parameter is powered up to the dimension of the observed system. This kind of observers preserves the main properties of conventional high-gain observers in terms of tunability of the speed of convergence and robustness to exogenous disturbances, by outperforming those in terms of numerical implementation and sensitivity to high-frequency measurement noise. The drawback of low-power high-gain observers over the conventional ones is given by the dimension of its dynamics that is larger.


Nonlinear Observers High-Gain Observers Noise Sensitivity 
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Authors and Affiliations

  1. 1.CNRS, LAGEPP UMR 5007VilleurbanneFrance
  2. 2.CASY-DEIUniversity of BolognaBolognaItaly

Section editors and affiliations

  • Alberto Isidori
    • 1
  1. 1.Department of Computer, Control, Management Engng. “A. Ruberti”University of Rome “La Sapienza”RomeItaly