Observer design for continuous-time dynamical systems

P Bernard, V Andrieu, D Astolfi - Annual Reviews in Control, 2022 - Elsevier
We review the main design techniques of state observer design for continuous-time
dynamical systems, namely algorithms which reconstruct online the full information of a …

A high-gain nonlinear observer with limited gain power

D Astolfi, L Marconi - IEEE Transactions on Automatic Control, 2015 - ieeexplore.ieee.org
In this note we deal with a new observer for nonlinear systems of dimension n in canonical
observability form. We follow the standard high-gain paradigm, but instead of having an …

Low-power peaking-free high-gain observers

D Astolfi, L Marconi, L Praly, AR Teel - Automatica, 2018 - Elsevier
We propose a peaking-free low-power high-gain observer that preserves the main feature of
standard high-gain observers in terms of arbitrarily fast convergence to zero of the …

Constrained state estimation for nonlinear systems: a redesign approach based on convexity

D Astolfi, P Bernard, R Postoyan… - IEEE Transactions on …, 2021 - ieeexplore.ieee.org
Given a plant whose trajectories of interest remain in a known compact set and an
associated observer, we propose a general framework to modify this observer so that its …

Low-power peaking-free high-gain observers for nonlinear systems

D Astolfi, L Marconi, A Teel - 2016 European Control …, 2016 - ieeexplore.ieee.org
In this note the low-power observer structure presented in [1] is modified to avoid peaking of
the observer state while preserving its good sensitivity properties to measurement noise and …

Robust output feedback control of fixed-wing aircraft

A Raza, FM Malik, R Khan, N Mazhar… - Aircraft Engineering and …, 2020 - emerald.com
Purpose This paper aims to devise a robust controller for the non-linear aircraft model using
output feedback control topology in the presence of uncertain aerodynamic parameters …

Expressing an observer in preferred coordinates by transforming an injective immersion into a surjective diffeomorphism

P Bernard, V Andrieu, L Praly - SIAM Journal on Control and Optimization, 2018 - SIAM
When designing observers for nonlinear systems, the dynamics of the given system and of
the designed observer are usually not expressed in the same coordinates or even have …

A hybrid scheme for reducing peaking in high-gain observers for a class of nonlinear systems

V Andrieu, C Prieur, S Tarbouriech, L Zaccarian - Automatica, 2016 - Elsevier
For a family of nonlinearly interconnected second order plants, we propose a hybrid
modification of the well known high-gain observer design, which leads to guaranteed …

SOC and diffusion rate estimation in redox flow batteries: An I&I-based high-gain observer approach

A Clemente, A Cecilia… - 2021 European Control …, 2021 - ieeexplore.ieee.org
This paper presents an adaptive non-linear observer for the state of charge estimation in
vanadium redox flow batteries. The study is based directly on the use of nonlinear equations …

Design of local observers for autonomous nonlinear systems not in observability canonical form

D Astolfi, C Possieri - Automatica, 2019 - Elsevier
The main objective of this paper is to propose a framework for the design of local asymptotic
observers, with arbitrarily fast rate of convergence, for autonomous nonlinear systems that …