16 citations · 34 across the 11 of their papers we have counts for
17 papers
Output feedback stabilisation of bilinear systems via control templates
Ludovic Sacchelli, Lucas Brivadis, Ulysse Serres +1
We establish a separation principle for the output feedback stabilisation of state-affine systems that are observable at the stabilization target. Relying on control templates (rec…
On the existence of KKL observers with nonlinear contracting dynamics (Long Version)
Victor Pachy, Vincent Andrieu, Pauline Bernard +2
KKL (Kazantzis-Kravaris/Luenberger) observers are based on the idea of immersing a given nonlinear system into a target system that is a linear stable filter of the measured output…
Exponential stabilizability and observability at the target imply semiglobal exponential stabilizability by templated output feedback
Vincent Andrieu, Lucas Brivadis, Jean-Paul Gauthier +2
For nonlinear analytic control systems, we introduce a new paradigm for dynamic output feedback stabilization. We propose to periodically sample the usual observer based control la…
On forwarding techniques for stabilization and set-point output regulation of semilinear infinite-dimensional systems
Nicolas Vanspranghe, Lucas Brivadis, Lassi Paunonen
A stabilizer based on the forwarding technique is proposed for semilinear infinite-dimensional systems in cascade form. Sufficient conditions for local exponentially stability and…
Output feedback stabilization of non-uniformly observable systems by means of a switched Kalman-like observer
Lucas Brivadis, Ludovic Sacchelli
We propose to explore switching methods in order to recover some properties of Kalmanlike observers for output feedback stabilization of state-affine systems that may present obser…
Output regulation of infinite-dimensional nonlinear systems: a forwarding approach for contraction semigroups
Nicolas Vanspranghe, Lucas Brivadis
This paper deals with the problem of robust output regulation of systems governed by nonlinear contraction semigroups. After adding an integral action to the system, we design a fe…
Approximate observability and back and forth observer of a PDE model of crystallisation process
Lucas Brivadis, Ludovic Sacchelli
In this paper, we are interested in the estimation of Particle Size Distributions (PSDs) during a batch crystallization process in which particles of two different shapes coexist a…
New inversion methods for the single/multi-shape CLD-to-PSD problem with spheroid particles
Lucas Brivadis, Ludovic Sacchelli
In this paper, we express the Chord Length Distribution (CLD) measure associated to a given Particle Size Distribution (PSD) when particles are modeled as suspended spheroids in a…
New perspectives on output feedback stabilization at an unobservable target
Lucas Brivadis, Jean-Paul Gauthier, Ludovic Sacchelli +1
We address the problem of dynamic output feedback stabilization at an unobservable target point. The challenge lies in according the antagonistic nature of the objective and the pr…
Forwarding design for stabilization of a coupled transport equation-ODE with a cone-bounded input nonlinearity
Swann Marx, Lucas Brivadis, Daniele Astolfi
We propose a new design technique for the stabilization of coupled ODE-PDE systems in feedforward form. In particular, we address the stabilization problem of a one-dimensional tra…
Forwarding techniques for the global stabilization of dissipative infinite-dimensional systems coupled with an ODE
Swann Marx, Lucas Brivadis, Daniele Astolfi
This paper deals with the stabilization of a coupled system composed by an infinite-dimensional system and an ODE. Moreover, the control, which appears in the dynamics of the ODE,…
New dynamical observer for a batch crystallization process based on solute concentration
Vincent Andrieu, Emilie Gagnière, Elodie Chabanon +4
In this paper a new observer is introduced to estimate the Crystal Size Distribution (CSD) only from the measurements of the solute concentration, temperature and a model of the gr…
From local to global asymptotic stabilizability for weakly contractive control systems
Vincent Andrieu, Lucas Brivadis, Jean-Paul Gauthier +2
A nonlinear control system is said to be weakly contractive in the control if the flow that it generates is non-expanding (in the sense that the distance between two trajectories i…
Luenberger observers for infinite-dimensional systems, Back and Forth Nudging and application to a crystallization process
Lucas Brivadis, Vincent Andrieu, Ulysse Serres +1
This paper deals with the observer design problem for time-varying linear infinite-dimensional systems. We address both the problem of online estimation of the state of the system…
Luenberger observers for discrete-time nonlinear systems
Lucas Brivadis, Vincent Andrieu, Ulysse Serres
In this paper, we consider the problem of designing an asymptotic observer for a nonlin-ear dynamical system in discrete-time following Luenberger's original idea. This approach is…
Dynamic Output Feedback Stabilization of Non-uniformly Observable Dissipative Systems
Ludovic Sacchelli, Lucas Brivadis, Vincent Andrieu +2
Output feedback stabilization of control systems is a crucial issue in engineering. Most of these systems are not uniformly observable, which proves to be a difficulty to move from…
Avoiding observability singularities in output feedback bilinear systems
Lucas Brivadis, Jean-Paul Gauthier, Ludovic Sacchelli +1
Control-affine output systems generically present observability singularities, i.e. inputs that make the system unobservable. This proves to be a difficulty in the context of outpu…