325 citations · 841 across the 67 of their papers we have counts for
7 papers · 1 filter
An Adaptive Passivity-Based Controller of a Buck-Boost Converter With a Constant Power Load
Wei He, Romeo Ortega, Juan E. Machado +1
This paper addresses the problem of regulating the output voltage of a DC-DC buck-boost converter feeding a constant power load,which is a problem of current practical interest. De…
On State Observers for Nonlinear Systems: A New Design and a Unifying Framework
Bowen Yi, Romeo Ortega, Weidong Zhang
In this paper we propose a new observer design technique for nonlinear systems. It combines the well-known Kazantzis-Kravaris-Luenberger observer and the recently introduced parame…
Conditions on Shifted Passivity of Port-Hamiltonian Systems
Nima Monshizadeh, Pooya Monshizadeh, Romeo Ortega +1
In this paper, we examine the shifted passivity property of port-Hamiltonian systems. Shifted passivity accounts for the fact that in many applications the desired steady-state val…
A Robust Adaptive Flux Observer for a Class of Electromechanical Systems
Anton Pyrkin, Alexey Vedyakov, Romeo Ortega +1
The problem of designing a flux observer for magnetic field electromechanical systems from noise corrupted measurements of currents and voltages is addressed in this paper. Imposin…
State Observers for Sensorless Control of Magnetic Levitation Systems
Alexey Bobtsov, Anton Pyrkin, Romeo Ortega +1
In this paper we address the problem of state observation for sensorless control of nonlinear magnetic levitation systems, that is, the regulation of the position of a levitated ob…
New results on disturbance rejection for energy-shaping controlled port-Hamiltonian systems
Joel Ferguson, Alejandro Donaire, Romeo Ortega +1
In this paper we present a method to robustify energy-shaping controllers for port-Hamiltonian (pH) systems by adding an integral action that rejects unknown additive disturbances.…
Matched disturbance rejection for energy-shaping controlled underactuated mechanical systems
Joel Ferguson, Alejandro Donaire, Romeo Ortega +1
In this paper, we present a method of applying integral action to enhance the robustness of energy shaping controllers for underactuated mechanical systems with matched disturbance…