Search Results for author: Victor G. Lopez

Found 17 papers, 0 papers with code

Data-Based Control of Continuous-Time Linear Systems with Performance Specifications

no code implementations1 Mar 2024 Victor G. Lopez, Matthias A. Müller

First, we formulate and solve a trajectory-reference control problem, on which desired closed-loop trajectories are known and a controller that allows the system to closely follow those trajectories is computed.

Gaussian Process-Based Nonlinear Moving Horizon Estimation

no code implementations7 Feb 2024 Tobias M. Wolff, Victor G. Lopez, Matthias A. Müller

On the other hand, we exploit the posterior variances of the Gaussian processes to design the weighting matrices in the MHE cost function and account for the uncertainty in the learned system dynamics.

Gaussian Processes

Sample-based nonlinear detectability for discrete-time systems

no code implementations21 Dec 2023 Isabelle Krauss, Victor G. Lopez, Matthias A. Müller

This paper introduces two sample-based formulations of incremental input/output-to-state stability (i-IOSS), a suitable detectability notion for general nonlinear systems.

An efficient data-based off-policy Q-learning algorithm for optimal output feedback control of linear systems

no code implementations6 Dec 2023 Mohammad Alsalti, Victor G. Lopez, Matthias A. Müller

In this paper, we present a Q-learning algorithm to solve the optimal output regulation problem for discrete-time LTI systems.

Q-Learning

Notes on data-driven output-feedback control of linear MIMO systems

no code implementations29 Nov 2023 Mohammad Alsalti, Victor G. Lopez, Matthias A. Müller

Recent works have approached the data-driven design of output-feedback controllers for discrete-time LTI systems by constructing non-minimal state vectors composed of past inputs and outputs.

Sample- and computationally efficient data-driven predictive control

no code implementations20 Sep 2023 Mohammad Alsalti, Manuel Barkey, Victor G. Lopez, Matthias A. Müller

Recently proposed data-driven predictive control schemes for LTI systems use non-parametric representations based on the image of a Hankel matrix of previously collected, persistently exciting, input-output data.

Data-based system representations from irregularly measured data

no code implementations21 Jul 2023 Mohammad Alsalti, Ivan Markovsky, Victor G. Lopez, Matthias A. Müller

Non-parametric representations of dynamical systems based on the image of a Hankel matrix of data are extensively used for data-driven control.

Low-Rank Matrix Completion

An Efficient Off-Policy Reinforcement Learning Algorithm for the Continuous-Time LQR Problem

no code implementations31 Mar 2023 Victor G. Lopez, Matthias A. Müller

Moreover, we formulate the policy evaluation step as the solution of a Sylvester-transpose equation, which increases the efficiency of its solution.

reinforcement-learning

Data-driven Nonlinear Predictive Control for Feedback Linearizable Systems

no code implementations11 Nov 2022 Mohammad Alsalti, Victor G. Lopez, Julian Berberich, Frank Allgöwer, Matthias A. Müller

We present a data-driven nonlinear predictive control approach for the class of discrete-time multi-input multi-output feedback linearizable nonlinear systems.

Robust Data-Driven Moving Horizon Estimation for Linear Discrete-Time Systems

no code implementations17 Oct 2022 Tobias M. Wolff, Victor G. Lopez, Matthias A. Müller

In this paper, a robust data-driven moving horizon estimation (MHE) scheme for linear time-invariant discrete-time systems is introduced.

Sample-based observability of linear discrete-time systems

no code implementations13 Apr 2022 Isabelle Krauss, Victor G. Lopez, Matthias A. Müller

In this work, sample-based observability of linear discrete-time systems is studied.

On a Continuous-Time Version of Willems' Lemma

no code implementations7 Mar 2022 Victor G. Lopez, Matthias A. Müller

In this paper, a method to represent every input-output trajectory of a continuous-time linear system in terms of previously collected data is presented.

LEMMA

Data-Based Moving Horizon Estimation for Linear Discrete-Time Systems

no code implementations9 Nov 2021 Tobias M. Wolff, Victor G. Lopez, Matthias A. Müller

This paper introduces a data-based moving horizon estimation (MHE) scheme for linear time-invariant discrete-time systems.

Efficient Off-Policy Q-Learning for Data-Based Discrete-Time LQR Problems

no code implementations17 May 2021 Victor G. Lopez, Mohammad Alsalti, Matthias A. Müller

The proposed method does not require any knowledge of the system dynamics, and it enjoys significant efficiency advantages over other data-based optimal control methods in the literature.

Q-Learning

Data-Based System Analysis and Control of Flat Nonlinear Systems

no code implementations4 Mar 2021 Mohammad Alsalti, Julian Berberich, Victor G. Lopez, Frank Allgöwer, Matthias A. Müller

Willems et al. showed that all input-output trajectories of a discrete-time linear time-invariant system can be obtained using linear combinations of time shifts of a single, persistently exciting, input-output trajectory of that system.

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