118 citations · 599 across the 48 of their papers we have counts for
28 papers · 1 filter
Active Disturbance Rejection for Boundary Control Systems
Jukka-Pekka Humaloja, Lassi Paunonen
We consider stabilisation of abstract boundary control systems and controlled partial differential equations with general unknown input disturbances and unmodeled nonlinearities at…
Dynamic Stabilisation of Boundary Control Systems
Mohamed Fkirine, Lassi Paunonen
We design observer-based controllers to stabilise abstract linear boundary control systems on Hilbert spaces. Our main results introduce conditions for exponential, strong, and pol…
Funnel control for passive infinite-dimensional systems
Thavamani Govindaraj, Anthony Hastir, Lassi Paunonen +1
We consider funnel control for linear infinite-dimensional systems that are impedance passive, meaning that they satisfy an energy balance in which the stored energy equals the squ…
Projected integral control of impedance passive nonlinear systems
Nicolas Vanspranghe, Pietro Lorenzetti, Lassi Paunonen +1
We propose an abstract framework for solving the constrained set-point tracking problem for impedance passive infinite-dimensional nonlinear systems. The class of systems considere…
Output Regulation for Impedance Passive Systems with Input Saturation
Thavamani Govindaraj, Lassi Paunonen
We consider output tracking and disturbance rejection for abstract infinite-dimensional systems with input saturation. We solve the control problem using a control law which consis…
Polynomial stability of wind turbine tower models
Mohamed Fkirine, Lassi Paunonen
We investigate the stabilization of mathematical models describing the structural dynamics of monopile wind turbine towers. In the fore-aft plane, we show that the system becomes p…
Well-Posedness and Stability of Infinite-Dimensional Systems Under Monotone Feedback
Anthony Hastir, Lassi Paunonen
We study the well-posedness and stability of an impedance passive infinite-dimensional linear system under nonlinear feedback of the form , where is a monoto…
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…
Robust Controllers for a Flexible Satellite Model
Thavamani Govindaraj, Jukka-Pekka Humaloja, Lassi Paunonen
We consider a PDE-ODE model of a flexible satellite that is composed of two identical flexible solar panels and a center rigid body. We prove that the satellite model is exponentia…
On Robust Regulation of PDEs: from Abstract Methods to PDE Controllers
Lassi Paunonen, Jukka-Pekka Humaloja
In this paper we study robust output tracking and disturbance rejection of linear partial differential equation (PDE) models. We focus on demonstrating how the abstract internal mo…
Subsystem-Based Control with Modularity for Strict-Feedback Form Nonlinear Systems
Janne Koivumäki, Jukka-Pekka Humaloja, Lassi Paunonen +2
This study proposes an adaptive subsystem-based control (SBC) for systematic and straightforward nonlinear~control of nth-order strict-feedback form (SFF) systems.~By decomposing t…
A Reduced Order Controller for Output Tracking of a Kelvin-Voigt Beam
Lassi Paunonen, Duy Phan
We study output tracking and disturbance rejection for an Euler-Bernoulli beam with Kelvin-Voigt damping. The system has distributed control and pointwise observation. As our main…
Robust Output Tracking for a Room Temperature Model with Distributed Control and Observation
Konsta Huhtala, Lassi Paunonen, Weiwei Hu
We consider robust output regulation of a partial differential equation model describing temperature evolution in a room. More precisely, we examine a two-dimensional room model wi…
Time-Varying Internal Models and Regulation of Unknown Harmonic Signals for Regular Linear Systems
Lassi Paunonen, Sepideh Afshar
We introduce general results on well-posedness and output regulation of regular linear systems with nonautonomous controllers. We present a generalization of the internal model pri…
Decentralized Observer Design for Virtual Decomposition Control
Jukka-Pekka Humaloja, Janne Koivumäki, Lassi Paunonen +1
In this paper, we incorporate velocity observer design into the virtual decomposition control (VDC) strategy of an -DoF open chain robotic manipulator. Descending from the VDC s…
Finite-Dimensional Controllers for Robust Regulation of Boundary Control Systems
Duy Phan, Lassi Paunonen
We study the robust output regulation of linear boundary control systems by constructing extended systems. The extended systems are established based on solving static differential…
A Lyapunov Approach to Robust Regulation of Distributed Port-Hamiltonian Systems
Lassi Paunonen, Yann Le Gorrec, Héctor Ramírez
This paper studies robust output tracking and disturbance rejection for boundary controlled infinite-dimensional port--Hamiltonian systems including second order models such as the…
Introduction to "RORPack": A Python Software Library for Robust Output Regulation
Lassi Paunonen
This document contains the mathematical introduction to RORPack - a Python software library for robust output tracking and disturbance rejection for linear PDE systems. The RORPack…
Reduced Order Controller Design for Robust Output Regulation
Lassi Paunonen, Duy Phan
We study robust output regulation for parabolic partial differential equations and other infinite-dimensional linear systems with analytic semigroups. As our main results we show t…
Approximate robust output regulation of boundary control systems
Jukka-Pekka Humaloja, Mikael Kurula, Lassi Paunonen
We extend the internal model principle for systems with boundary control and boundary observation, and construct a robust controller for this class of systems. However, as a conseq…
Robust Regulation of Infinite-Dimensional Port-Hamiltonian Systems
Jukka-Pekka Humaloja, Lassi Paunonen
We will give general sufficient conditions under which a controller achieves robust regulation for a boundary control and observation system. Utilizing these conditions we construc…
Stability and Robust Regulation of Passive Linear Systems
Lassi Paunonen
We study the stability of coupled impedance passive regular linear systems under power-preserving interconnections. We present new conditions for strong, exponential, and non-unifo…
Reduced Order Internal Models in the Frequency Domain
Petteri Laakkonen, Lassi Paunonen
The internal model principle states that all robustly regulating controllers must contain a suitably reduplicated internal model of the signal to be regulated. Using frequency doma…
Robust Output Regulation for Continuous-Time Periodic Systems
Lassi Paunonen
We consider controller design for robust output tracking and disturbance rejection for continuous-time periodic linear systems with periodic reference and disturbance signals. As o…