no code implementations • 20 Jan 2024 • Alexandre Didier, Andrea Zanelli, Kim P. Wabersich, Melanie N. Zeilinger
Predictive safety filters provide a way of projecting potentially unsafe inputs, proposed, e. g. by a human or learning-based controller, onto the set of inputs that guarantee recursive state and input constraint satisfaction by leveraging model predictive control techniques.
no code implementations • 15 Jan 2024 • Nicolas Chatzikiriakos, Kim P. Wabersich, Felix Berkel, Patricia Pauli, Andrea Iannelli
This combination enables us to obtain a corresponding optimal control law, which can be implemented efficiently on embedded platforms.
no code implementations • 1 Dec 2022 • Simon Muntwiler, Kim P. Wabersich, Robert Miklos, Melanie N. Zeilinger
We present an output feedback stochastic model predictive control (SMPC) approach for linear systems subject to Gaussian disturbances and measurement noise and probabilistic constraints on system states and inputs.
no code implementations • 28 Nov 2022 • Alexandre Didier, Robin C. Jacobs, Jerome Sieber, Kim P. Wabersich, Melanie N. Zeilinger
A predictive control barrier function (PCBF) based safety filter is a modular framework to verify safety of a control input by predicting a future trajectory.
no code implementations • 27 Sep 2021 • Alexandre Didier, Kim P. Wabersich, Melanie N. Zeilinger
By continuously connecting the current system state with a safe terminal set using a robust tube, safety can be ensured.
1 code implementation • 8 Sep 2021 • Simon Muntwiler, Kim P. Wabersich, Melanie N. Zeilinger
In a numerical example of estimating temperatures of a group of manufacturing machines, we show the performance of tuning the unknown system parameters and the benefits of integrating physical state constraints in the MHE formulation.
no code implementations • 21 May 2021 • Kim P. Wabersich, Melanie N. Zeilinger
While learning-based control techniques often outperform classical controller designs, safety requirements limit the acceptance of such methods in many applications.
no code implementations • 5 Jun 2020 • Kim P. Wabersich, Melanie N. Zeilinger
Furthermore, it is shown that the proposed constraint tightening implies a bound on the expected number of unsafe learning episodes in the linear and nonlinear case using a soft-constrained MPC formulation.
no code implementations • 6 Apr 2020 • Simon Muntwiler, Kim P. Wabersich, Lukas Hewing, Melanie N. Zeilinger
Distributed model predictive control methods for uncertain systems often suffer from considerable conservatism and can tolerate only small uncertainties due to the use of robust formulations that are amenable to distributed design and optimization methods.
no code implementations • 5 Nov 2019 • Simon Muntwiler, Kim P. Wabersich, Andrea Carron, Melanie N. Zeilinger
While distributed algorithms provide advantages for the control of complex large-scale systems by requiring a lower local computational load and less local memory, it is a challenging task to design high-performance distributed control policies.
no code implementations • 13 Dec 2018 • Kim P. Wabersich, Melanie N. Zeilinger
In this paper, we address this problem for nonlinear systems with continuous state and input spaces by introducing a predictive safety filter, which is able to turn a constrained dynamical system into an unconstrained safe system and to which any RL algorithm can be applied `out-of-the-box'.
no code implementations • 22 Mar 2018 • Kim P. Wabersich, Melanie N. Zeilinger
The MPSC scheme can be used in order to expand any potentially conservative set of safe states for learning and we prove an iterative technique for enlarging the safe set.
no code implementations • 30 Nov 2017 • Kim P. Wabersich, Melanie N. Zeilinger
The control of complex systems faces a trade-off between high performance and safety guarantees, which in particular restricts the application of learning-based methods to safety-critical systems.