Search Results for author: Armin Lederer

Found 28 papers, 4 papers with code

Cooperative Learning with Gaussian Processes for Euler-Lagrange Systems Tracking Control under Switching Topologies

no code implementations5 Feb 2024 Zewen Yang, Songbo Dong, Armin Lederer, Xiaobing Dai, Siyu Chen, Stefan Sosnowski, Georges Hattab, Sandra Hirche

This work presents an innovative learning-based approach to tackle the tracking control problem of Euler-Lagrange multi-agent systems with partially unknown dynamics operating under switching communication topologies.

Gaussian Processes

Risk-Sensitive Inhibitory Control for Safe Reinforcement Learning

no code implementations2 Oct 2023 Armin Lederer, Erfaun Noorani, John S. Baras, Sandra Hirche

We propose a method for learning these value functions using common techniques from reinforcement learning and derive sufficient conditions for its success.

reinforcement-learning Safe Reinforcement Learning

Episodic Gaussian Process-Based Learning Control with Vanishing Tracking Errors

no code implementations10 Jul 2023 Armin Lederer, Jonas Umlauft, Sandra Hirche

We address this issue by deriving a Bayesian prediction error bound for GP regression, which we show to decay with the growth of a novel, kernel-based measure of data density.

regression

Koopman Kernel Regression

1 code implementation NeurIPS 2023 Petar Bevanda, Max Beier, Armin Lederer, Stefan Sosnowski, Eyke Hüllermeier, Sandra Hirche

Many machine learning approaches for decision making, such as reinforcement learning, rely on simulators or predictive models to forecast the time-evolution of quantities of interest, e. g., the state of an agent or the reward of a policy.

Decision Making regression

Can Learning Deteriorate Control? Analyzing Computational Delays in Gaussian Process-Based Event-Triggered Online Learning

no code implementations14 May 2023 Xiaobing Dai, Armin Lederer, Zewen Yang, Sandra Hirche

When the dynamics of systems are unknown, supervised machine learning techniques are commonly employed to infer models from data.

Learning-Based Optimal Control with Performance Guarantees for Unknown Systems with Latent States

1 code implementation31 Mar 2023 Robert Lefringhausen, Supitsana Srithasan, Armin Lederer, Sandra Hirche

As control engineering methods are applied to increasingly complex systems, data-driven approaches for system identification appear as a promising alternative to physics-based modeling.

Safe Learning-Based Control of Elastic Joint Robots via Control Barrier Functions

no code implementations1 Dec 2022 Armin Lederer, Azra Begzadić, Neha Das, Sandra Hirche

Ensuring safety is of paramount importance in physical human-robot interaction applications.

Networked Online Learning for Control of Safety-Critical Resource-Constrained Systems based on Gaussian Processes

no code implementations23 Feb 2022 Armin Lederer, Mingmin Zhang, Samuel Tesfazgi, Sandra Hirche

Safety-critical technical systems operating in unknown environments require the ability to quickly adapt their behavior, which can be achieved in control by inferring a model online from the data stream generated during operation.

Gaussian Processes Management

Diffeomorphically Learning Stable Koopman Operators

1 code implementation8 Dec 2021 Petar Bevanda, Max Beier, Sebastian Kerz, Armin Lederer, Stefan Sosnowski, Sandra Hirche

System representations inspired by the infinite-dimensional Koopman operator (generator) are increasingly considered for predictive modeling.

Operator learning

Adaptive Low-Pass Filtering using Sliding Window Gaussian Processes

no code implementations5 Nov 2021 Alejandro J. Ordóñez-Conejo, Armin Lederer, Sandra Hirche

To reduce noise, low-pass filters are commonly employed in order to attenuate high frequency components in the incoming signal, regardless if they come from noise or the actual signal.

Gaussian Processes

Personalized Rehabilitation Robotics based on Online Learning Control

no code implementations1 Oct 2021 Samuel Tesfazgi, Armin Lederer, Johannes F. Kunz, Alejandro J. Ordóñez-Conejo, Sandra Hirche

The use of rehabilitation robotics in clinical applications gains increasing importance, due to therapeutic benefits and the ability to alleviate labor-intensive works.

Gaussian Process Uniform Error Bounds with Unknown Hyperparameters for Safety-Critical Applications

1 code implementation6 Sep 2021 Alexandre Capone, Armin Lederer, Sandra Hirche

Our approach computes a confidence region in the space of hyperparameters, which enables us to obtain a probabilistic upper bound for the model error of a Gaussian process with arbitrary hyperparameters.

Gaussian Processes

Inverse Reinforcement Learning: A Control Lyapunov Approach

no code implementations9 Apr 2021 Samuel Tesfazgi, Armin Lederer, Sandra Hirche

A common approach to solve this problem is the framework of inverse reinforcement learning (IRL), where the observed agent, e. g., a human demonstrator, is assumed to behave according to an intrinsic cost function that reflects its intent and informs its control actions.

reinforcement-learning Reinforcement Learning (RL)

Distributed Bayesian Online Learning for Cooperative Manipulation

no code implementations9 Apr 2021 Pablo Budde gen. Dohmann, Armin Lederer, Marcel Dißemond, Sandra Hirche

To overcome this shortcoming, we propose a novel distributed learning framework for the exemplary task of cooperative manipulation using Bayesian principles.

Distributed Learning Consensus Control for Unknown Nonlinear Multi-Agent Systems based on Gaussian Processes

no code implementations29 Mar 2021 Zewen Yang, Stefan Sosnowski, Qingchen Liu, Junjie Jiao, Armin Lederer, Sandra Hirche

In this paper, a distributed learning leader-follower consensus protocol based on Gaussian process regression for a class of nonlinear multi-agent systems with unknown dynamics is designed.

Gaussian Processes regression

Uniform Error and Posterior Variance Bounds for Gaussian Process Regression with Application to Safe Control

no code implementations13 Jan 2021 Armin Lederer, Jonas Umlauft, Sandra Hirche

In application areas where data generation is expensive, Gaussian processes are a preferred supervised learning model due to their high data-efficiency.

Gaussian Processes regression

The Impact of Data on the Stability of Learning-Based Control- Extended Version

no code implementations20 Nov 2020 Armin Lederer, Alexandre Capone, Thomas Beckers, Jonas Umlauft, Sandra Hirche

In this paper, we propose a Lyapunov-based measure for quantifying the impact of data on the certifiable control performance.

Gaussian Processes

Deep Learning based Uncertainty Decomposition for Real-time Control

no code implementations6 Oct 2020 Neha Das, Jonas Umlauft, Armin Lederer, Thomas Beckers, Sandra Hirche

Data-driven control in unknown environments requires a clear understanding of the involved uncertainties for ensuring safety and efficient exploration.

Efficient Exploration

Real-Time Regression with Dividing Local Gaussian Processes

no code implementations16 Jun 2020 Armin Lederer, Alejandro Jose Ordonez Conejo, Korbinian Maier, Wenxin Xiao, Jonas Umlauft, Sandra Hirche

The increased demand for online prediction and the growing availability of large data sets drives the need for computationally efficient models.

Gaussian Processes regression

Learning Stable Nonparametric Dynamical Systems with Gaussian Process Regression

no code implementations14 Jun 2020 Wenxin Xiao, Armin Lederer, Sandra Hirche

Modelling real world systems involving humans such as biological processes for disease treatment or human behavior for robotic rehabilitation is a challenging problem because labeled training data is sparse and expensive, while high prediction accuracy is required from models of these dynamical systems.

regression

GP3: A Sampling-based Analysis Framework for Gaussian Processes

no code implementations14 Jun 2020 Armin Lederer, Markus Kessler, Sandra Hirche

In order to overcome this issue, we propose a novel framework called GP3, general purpose computation on graphics processing units for Gaussian processes, which allows to solve many of the existing problems efficiently.

Computational Efficiency Gaussian Processes

Smart Forgetting for Safe Online Learning with Gaussian Processes

no code implementations L4DC 2020 Jonas Umlauft, Thomas Beckers, Alexandre Capone, Armin Lederer, Sandra Hirche

The identification of unknown dynamical systems using supervised learning enables model-based control of systems that cannot be modeled based on first principles.

Computational Efficiency Gaussian Processes

Parameter Optimization for Learning-based Control of Control-Affine Systems

no code implementations L4DC 2020 Armin Lederer, Alexandre Capone, Sandra Hirche

By relaxing the problem through scenario optimization we derive a provably optimal method for control parameter tuning.

regression

How Training Data Impacts Performance in Learning-based Control

no code implementations25 May 2020 Armin Lederer, Alexandre Capone, Jonas Umlauft, Sandra Hirche

When first principle models cannot be derived due to the complexity of the real system, data-driven methods allow us to build models from system observations.

Localized active learning of Gaussian process state space models

no code implementations L4DC 2020 Alexandre Capone, Jonas Umlauft, Thomas Beckers, Armin Lederer, Sandra Hirche

We apply the proposed method to explore the state space of various dynamical systems and compare our approach to a commonly used entropy-based exploration strategy.

Active Learning Model Predictive Control

Posterior Variance Analysis of Gaussian Processes with Application to Average Learning Curves

no code implementations4 Jun 2019 Armin Lederer, Jonas Umlauft, Sandra Hirche

The posterior variance of Gaussian processes is a valuable measure of the learning error which is exploited in various applications such as safe reinforcement learning and control design.

Gaussian Processes reinforcement-learning +2

Uniform Error Bounds for Gaussian Process Regression with Application to Safe Control

no code implementations NeurIPS 2019 Armin Lederer, Jonas Umlauft, Sandra Hirche

Finally, we derive safety conditions for the control of unknown dynamical systems based on Gaussian process models and evaluate them in simulations of a robotic manipulator.

Gaussian Processes regression

Cannot find the paper you are looking for? You can Submit a new open access paper.