no code implementations • 29 Mar 2024 • Felipe Morales, Rafael Cisneros, Romeo Ortega, Antonio Sanchez-Squella
In this article, we propose a nonlinear voltage control to ensure power exchange in a multiport interconnected system, which consists of a bidirectional DC-DC converter and generating-storing devices.
no code implementations • 12 Aug 2023 • Carlo Beltran, Alexey Bobtsov, Romeo Ortega, Diego Langarica-Cordoba, Rafael Cisneros, Luis H. Diaz-Saldierna
In this paper, we address the problem of online parameter estimation of a Proton Exchange Membrane Fuel Cell (PEMFC) polarization curve, that is the static relation between the voltage and the current of the PEMFC.
no code implementations • 17 Feb 2023 • Rafael Cisneros, Romeo Ortega, Carlo A. Beltrán, Diego Langarica-Córdoba, Luis H. Díaz-Saldierna
We show that, in spite of the inherent nonlinearities in the current-voltage behaviour of the fuel cell, the voltage of a fuel cell/boost converter system can be regulated with a simple proportional-integral (PI) action designed following the {Passivity-based Control (PBC) approach.
1 code implementation • 26 Jul 2022 • Rohan Pratap Singh, Mehdi Benallegue, Mitsuharu Morisawa, Rafael Cisneros, Fumio Kanehiro
To enable the application of RL policies for humanoid robots in real-world settings, it is crucial to build a system that can achieve robust walking in any direction, on 2D and 3D terrains, and be controllable by a user-command.
no code implementations • 14 Mar 2022 • Daniele Zonetti, Romeo Ortega, Rafael Cisneros, Alexey Bobtsov, Fernando Mancilla-David, Oriol Gomis-Bellmunt
We consider a Th\'evenin equivalent circuit capturing the dynamics of a power grid as seen from the point of common coupling with a power electronic converter, and provide a solution to the problem of online identification of the corresponding circuit parameters.
no code implementations • 15 Jan 2022 • Romeo Ortega, Rafael Cisneros, Lei Wang, Arjan van der Schaft
In this note we address the problem of indirect adaptive (regulation or tracking) control of nonlinear, input affine dissipative systems.
no code implementations • 19 Dec 2021 • Alexey Bobtsov, Romeo Ortega, Stanislav Aranovskiy, Rafael Cisneros
Wind turbines are often controlled to harvest the maximum power from the wind, which corresponds to the operation at the top of the bell-shaped power coefficient graph.