no code implementations • 6 May 2024 • Sean Kille, Paul Leibold, Philipp Karg, Balint Varga, Sören Hohmann
Physical Human-Machine Interaction plays a pivotal role in facilitating collaboration across various domains.
no code implementations • 30 Apr 2024 • Albertus Johannes Malan, Joel Ferguson, Michele Cucuzzella, Jacquelien M. A. Scherpen, Sören Hohmann
In this paper, we consider the problem of voltage stability in DC networks containing uncertain loads with non-monotone incremental impedances and where the steady-state power availability is restricted to a subset of the buses in the network.
no code implementations • 14 Mar 2024 • Daniel Flögel, Lars Fischer, Thomas Rudolf, Tobias Schürmann, Sören Hohmann
In addition, we propose a novel socially integrated navigation approach where the robot's social behavior is adaptive and emerges from the interaction with humans.
no code implementations • 10 Jan 2024 • Thomas Rudolf, Daniel Flögel, Tobias Schürmann, Simon Süß, Stefan Schwab, Sören Hohmann
We focus on the control of parameter-variant systems, a class of systems with complex behavior which depends on the operating conditions.
no code implementations • 5 Aug 2023 • Pol Jané-Soneira, Albertus J. Malan, Ionela Prodan, Sören Hohmann
This interconnection scheme requires only an exchange of the local prices and allows a globally economic optimal operation of networked microgrids at steady state, while guaranteeing asymptotic stability of the networked microgrids via the passivity properties of economic ports.
no code implementations • 26 Jun 2023 • Balint Varga, Dongxu Yang, Sören Hohmann
The novelties of this paper are the adaptation of a general cooperative and shared control framework to this novel use case and the application of an explicit prediction model of the pedestrian.
no code implementations • 20 May 2023 • Felix Strehle, Juan E. Machado, Michele Cucuzzella, Albertus J. Malan, Jacquelien M. A. Scherpen, Sören Hohmann
A fundamental precondition for the secure and efficient operation of district heating networks (DHNs) is a stable hydraulic behavior.
no code implementations • 26 Apr 2023 • Pol Jané-Soneira, Ionela Prodan, Albertus Johannes Malan, Sören Hohmann
Modern power systems are characterized by low inertia and fast voltage dynamics due to the increase of sources connecting via power electronics and the removal of large traditional thermal generators.
no code implementations • 3 Apr 2023 • Albertus J. Malan, Lukas Rausche, Felix Strehle, Sören Hohmann
The proposed pipeline and network models can serve as a basis for passivity-based control and analysis while the power system parallels facilitate the transfer of existing methods.
no code implementations • 31 Jan 2023 • Albertus Johannes Malan, Pol Jané-Soniera, Felix Strehle, Sören Hohmann
In this paper, we propose a novel four-stage distributed controller for a DC microgrid that achieves power sharing and average voltage regulation for the voltages at actuated and unactuated buses.
no code implementations • 4 Nov 2022 • Jona Maurer, Nicolai Tschuch, Stefan Krebs, Kankar Bhattacharya, Claudio Cañizares, Sören Hohmann
Transactive control has been developed as a promising approach based on market and control mechanisms to coordinate supply and demand in energy systems, which when applied to power systems is being referred to as transactive energy.
no code implementations • 6 Apr 2021 • Felix Strehle, Pulkit Nahata, Albertus Johannes Malan, Sören Hohmann, Giancarlo Ferrari-Trecate
Voltage and frequency control in an islanded AC microgrid (ImGs) amount to stabilizing an a priori unknown ImG equilibrium induced by loads and changes in topology.
no code implementations • 26 Oct 2020 • Florian Köpf, Sean Kille, Jairo Inga, Sören Hohmann
Therefore, we design an ADP-based optimal trajectory tracking controller and apply it to a large-scale ball-on-plate system.
no code implementations • 29 Oct 2019 • Florian Köpf, Samuel Tesfazgi, Michael Flad, Sören Hohmann
In order to collaborate efficiently with unknown partners in cooperative control settings, adaptation of the partners based on online experience is required.
Multi-agent Reinforcement Learning reinforcement-learning +1
no code implementations • 16 Sep 2019 • Florian Köpf, Simon Ramsteiner, Michael Flad, Sören Hohmann
We conclude our paper with an example which demonstrates that our new method successfully learns the optimal tracking controller and outperforms existing approaches in terms of tracking error and cost.
no code implementations • 9 Sep 2019 • Florian Köpf, Alexander Nitsch, Michael Flad, Sören Hohmann
Mixed cooperative-competitive control scenarios such as human-machine interaction with individual goals of the interacting partners are very challenging for reinforcement learning agents.
no code implementations • 12 Jun 2019 • Florian Köpf, Johannes Westermann, Michael Flad, Sören Hohmann
This paper provides for the first time an adaptive optimal control method capable to track reference trajectories not being generated by a time-invariant exo-system.