Search Results for author: Alisa Rupenyan

Found 23 papers, 0 papers with code

MPC of Uncertain Nonlinear Systems with Meta-Learning for Fast Adaptation of Neural Predictive Models

no code implementations18 Apr 2024 Jiaqi Yan, Ankush Chakrabarty, Alisa Rupenyan, John Lygeros

The framework consists of two phases: the (offine) meta-training phase learns a aggregated NSSM using data from source systems, and the (online) meta-inference phase quickly adapts this aggregated model to the target system using only a few data points and few online training iterations, based on local loss function gradients.

Guided Bayesian Optimization: Data-Efficient Controller Tuning with Digital Twin

no code implementations25 Mar 2024 Mahdi Nobar, Jürg Keller, Alisa Rupenyan, Mohammad Khosravi, John Lygeros

This article presents the guided Bayesian optimization algorithm as an efficient data-driven method for iteratively tuning closed-loop controller parameters using an event-triggered digital twin of the system based on available closed-loop data.

Bayesian Optimization Gaussian Processes

Force Controlled Printing for Material Extrusion Additive Manufacturing

no code implementations24 Mar 2024 Xavier Guidetti, Nathan Mingard, Raul Cruz-Oliver, Yannick Nagel, Marvin Rueppel, Alisa Rupenyan, Efe C. Balta, John Lygeros

In material extrusion additive manufacturing, the extrusion process is commonly controlled in a feed-forward fashion.

Tuning of Online Feedback Optimization for setpoint tracking in centrifugal compressors

no code implementations4 Dec 2023 Marta Zagorowska, Lukas Ortmann, Alisa Rupenyan, Mehmet Mercangoez, Lars Imsland

Online Feedback Optimization (OFO) controllers steer a system to its optimal operating point by treating optimization algorithms as auxiliary dynamic systems.

Layer-to-Layer Melt Pool Control in Laser Power Bed Fusion

no code implementations16 Nov 2023 Dominic Liao-McPherson, Efe C. Balta, Mohamadreza Afrasiabi, Alisa Rupenyan, Markus Bambach, John Lygeros

Additive manufacturing processes are flexible and efficient technologies for producing complex geometries.

Efficient safe learning for controller tuning with experimental validation

no code implementations26 Oct 2023 Marta Zagorowska, Christopher König, Hanlin Yu, Efe C. Balta, Alisa Rupenyan, John Lygeros

The performance of the new method is first validated in a simulated precision motion system, demonstrating improved computational efficiency, and illustrating the role of exploiting numerical solvers to reach the desired precision.

Computational Efficiency

Sequential Quadratic Programming-based Iterative Learning Control for Nonlinear Systems

no code implementations24 Jul 2023 Samuel Balula, Efe C. Balta, Dominic Liao-McPherson, Alisa Rupenyan, John Lygeros

We present simulations to illustrate the performance of the proposed method for linear and nonlinear dynamics models.

Safe Risk-averse Bayesian Optimization for Controller Tuning

no code implementations23 Jun 2023 Christopher Koenig, Miks Ozols, Anastasia Makarova, Efe C. Balta, Andreas Krause, Alisa Rupenyan

Controller tuning and parameter optimization are crucial in system design to improve both the controller and underlying system performance.

Bayesian Optimization

Drone-based Volume Estimation in Indoor Environments

no code implementations15 Nov 2022 Samuel Balula, Dominic Liao-McPherson, Stefan Stevšić, Alisa Rupenyan, John Lygeros

Volume estimation in large indoor spaces is an important challenge in robotic inspection of industrial warehouses.

Indoor Localization Surface Reconstruction

Meta-Learning Priors for Safe Bayesian Optimization

no code implementations3 Oct 2022 Jonas Rothfuss, Christopher Koenig, Alisa Rupenyan, Andreas Krause

In the presence of unknown safety constraints, it is crucial to choose reliable model hyper-parameters to avoid safety violations.

Bayesian Optimization Meta-Learning +1

Data-driven Reference Trajectory Optimization for Precision Motion Systems

no code implementations31 May 2022 Samuel Balula, Dominic Liao-McPherson, Alisa Rupenyan, John Lygeros

We propose a data-driven optimization-based pre-compensation method to improve the contour tracking performance of precision motion stages by modifying the reference trajectory and without modifying any built-in low-level controllers.

Position

Controller-Aware Dynamic Network Management for Industry 4.0

no code implementations28 May 2022 Efe C. Balta, Mohammad H. Mamduhi, John Lygeros, Alisa Rupenyan

In this paper, we consider a cyber-physical manufacturing system (CPMS) scenario containing physical components (robots, sensors, and actuators), operating in a digitally connected, constrained environment to perform industrial tasks.

Management

Advanced Manufacturing Configuration by Sample-efficient Batch Bayesian Optimization

no code implementations24 May 2022 Xavier Guidetti, Alisa Rupenyan, Lutz Fassl, Majid Nabavi, John Lygeros

We propose a framework for the configuration and operation of expensive-to-evaluate advanced manufacturing methods, based on Bayesian optimization.

Bayesian Optimization Benchmarking

On Robustness in Optimization-Based Constrained Iterative Learning Control

no code implementations10 Mar 2022 Dominic Liao-McPherson, Efe C. Balta, Alisa Rupenyan, John Lygeros

Iterative learning control (ILC) is a control strategy for repetitive tasks wherein information from previous runs is leveraged to improve future performance.

Learning-Based Repetitive Precision Motion Control with Mismatch Compensation

no code implementations19 Nov 2021 Efe C. Balta, Kira Barton, Dawn M. Tilbury, Alisa Rupenyan, John Lygeros

In this work, we develop an iterative approach for repetitive precision motion control problems where the objective is to follow a reference geometry with minimal tracking error.

GPR

Batch Model Predictive Control for Selective Laser Melting

no code implementations16 Nov 2021 Riccardo Zuliani, Efe C. Balta, Alisa Rupenyan, John Lygeros

Selective laser melting is a promising additive manufacturing technology enabling the fabrication of highly customizable products.

Model Predictive Control

In-layer Thermal Control of a Multi-layer Selective Laser Melting Process

no code implementations1 Nov 2021 Dominic Liao-McPherson, Efe C. Balta, Ryan Wüest, Alisa Rupenyan, John Lygeros

Selective Laser Melting (SLM) is an additive manufacturing technology that builds three dimensional parts by melting layers of metal powder together with a laser that traces out a desired geometry.

Plasma Spray Process Parameters Configuration using Sample-efficient Batch Bayesian Optimization

no code implementations25 Mar 2021 Xavier Guidetti, Alisa Rupenyan, Lutz Fassl, Majid Nabavi, John Lygeros

Recent work has shown constrained Bayesian optimization to be a powerful technique for the optimization of industrial processes.

Bayesian Optimization

Safety-Aware Cascade Controller Tuning Using Constrained Bayesian Optimization

no code implementations28 Oct 2020 Christopher König, Mohammad Khosravi, Markus Maier, Roy S. Smith, Alisa Rupenyan, John Lygeros

This paper presents an automated, model-free, data-driven method for the safe tuning of PID cascade controller gains based on Bayesian optimization.

Bayesian Optimization Gaussian Processes

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