Search Results for author: Jan Drgona

Found 21 papers, 4 papers with code

Metric Learning to Accelerate Convergence of Operator Splitting Methods for Differentiable Parametric Programming

no code implementations1 Apr 2024 Ethan King, James Kotary, Ferdinando Fioretto, Jan Drgona

Recent work has shown a variety of ways in which machine learning can be used to accelerate the solution of constrained optimization problems.

Decision Making Metric Learning

Neural Differential Algebraic Equations

no code implementations19 Mar 2024 James Koch, Madelyn Shapiro, Himanshu Sharma, Draguna Vrabie, Jan Drgona

In this work, we show that the proposed NDAEs abstraction is suitable for relevant system-theoretic data-driven modeling tasks.

A Robust, Efficient Predictive Safety Filter

no code implementations14 Nov 2023 Wenceslao Shaw Cortez, Jan Drgona, Draguna Vrabie, Mahantesh Halappanavar

In this paper, we propose a novel predictive safety filter that is robust to bounded perturbations and is implemented in an even-triggered fashion to reduce online computation.

Novel Concepts

Semi-Supervised Learning of Dynamical Systems with Neural Ordinary Differential Equations: A Teacher-Student Model Approach

no code implementations19 Oct 2023 Yu Wang, Yuxuan Yin, Karthik Somayaji Nanjangud Suryanarayana, Jan Drgona, Malachi Schram, Mahantesh Halappanavar, Frank Liu, Peng Li

Modeling dynamical systems is crucial for a wide range of tasks, but it remains challenging due to complex nonlinear dynamics, limited observations, or lack of prior knowledge.

Extreme Risk Mitigation in Reinforcement Learning using Extreme Value Theory

no code implementations24 Aug 2023 Karthik Somayaji NS, Yu Wang, Malachi Schram, Jan Drgona, Mahantesh Halappanavar, Frank Liu, Peng Li

Our work proposes to enhance the resilience of RL agents when faced with very rare and risky events by focusing on refining the predictions of the extreme values predicted by the state-action value function distribution.

reinforcement-learning Reinforcement Learning (RL)

Power Grid Behavioral Patterns and Risks of Generalization in Applied Machine Learning

no code implementations21 Apr 2023 Shimiao Li, Jan Drgona, Shrirang Abhyankar, Larry Pileggi

Recent years have seen a rich literature of data-driven approaches designed for power grid applications.

Machine Learning for Smart and Energy-Efficient Buildings

no code implementations27 Nov 2022 Hari Prasanna Das, Yu-Wen Lin, Utkarsha Agwan, Lucas Spangher, Alex Devonport, Yu Yang, Jan Drgona, Adrian Chong, Stefano Schiavon, Costas J. Spanos

In this work, we review the ways in which machine learning has been leveraged to make buildings smart and energy-efficient.

Differentiable Predictive Control with Safety Guarantees: A Control Barrier Function Approach

1 code implementation3 Aug 2022 Wenceslao Shaw Cortez, Jan Drgona, Aaron Tuor, Mahantesh Halappanavar, Draguna Vrabie

We develop a novel form of differentiable predictive control (DPC) with safety and robustness guarantees based on control barrier functions.

Model Predictive Control

Structural Inference of Networked Dynamical Systems with Universal Differential Equations

no code implementations11 Jul 2022 James Koch, Zhao Chen, Aaron Tuor, Jan Drgona, Draguna Vrabie

Networked dynamical systems are common throughout science in engineering; e. g., biological networks, reaction networks, power systems, and the like.

Data-driven Stabilization of Discrete-time Control-affine Nonlinear Systems: A Koopman Operator Approach

no code implementations26 Mar 2022 Subhrajit Sinha, Sai Pushpak Nandanoori, Jan Drgona, Draguna Vrabie

In recent years data-driven analysis of dynamical systems has attracted a lot of attention and transfer operator techniques, namely, Perron-Frobenius and Koopman operators are being used almost ubiquitously.

Time Series Time Series Analysis

Neuro-physical dynamic load modeling using differentiable parametric optimization

no code implementations20 Mar 2022 Shrirang Abhyankar, Jan Drgona, Andrew August, Elliot Skomski, Aaron Tuor

In this work, we investigate a data-driven approach for obtaining a reduced equivalent load model of distribution systems for electromechanical transient stability analysis.

Koopman-based Differentiable Predictive Control for the Dynamics-Aware Economic Dispatch Problem

1 code implementation16 Mar 2022 Ethan King, Jan Drgona, Aaron Tuor, Shrirang Abhyankar, Craig Bakker, Arnab Bhattacharya, Draguna Vrabie

The dynamics-aware economic dispatch (DED) problem embeds low-level generator dynamics and operational constraints to enable near real-time scheduling of generation units in a power network.

Scheduling

AutoNF: Automated Architecture Optimization of Normalizing Flows Using a Mixture Distribution Formulation

no code implementations29 Sep 2021 Yu Wang, Jan Drgona, Jiaxin Zhang, Karthik Somayaji NS, Frank Y Liu, Malachi Schram, Peng Li

Although various flow models based on different transformations have been proposed, there still lacks a quantitative analysis of performance-cost trade-offs between different flows as well as a systematic way of constructing the best flow architecture.

Deep Learning Explicit Differentiable Predictive Control Laws for Buildings

no code implementations25 Jul 2021 Jan Drgona, Aaron Tuor, Soumya Vasisht, Elliott Skomski, Draguna Vrabie

We present a differentiable predictive control (DPC) methodology for learning constrained control laws for unknown nonlinear systems.

Model Predictive Control

Constrained Block Nonlinear Neural Dynamical Models

no code implementations6 Jan 2021 Elliott Skomski, Soumya Vasisht, Colby Wight, Aaron Tuor, Jan Drgona, Draguna Vrabie

Neural network modules conditioned by known priors can be effectively trained and combined to represent systems with nonlinear dynamics.

Dissipative Deep Neural Dynamical Systems

no code implementations26 Nov 2020 Jan Drgona, Soumya Vasisht, Aaron Tuor, Draguna Vrabie

In this paper, we provide sufficient conditions for dissipativity and local asymptotic stability of discrete-time dynamical systems parametrized by deep neural networks.

Physics-Informed Neural State Space Models via Learning and Evolution

no code implementations26 Nov 2020 Elliott Skomski, Jan Drgona, Aaron Tuor

Recent works exploring deep learning application to dynamical systems modeling have demonstrated that embedding physical priors into neural networks can yield more effective, physically-realistic, and data-efficient models.

Model Selection

Physics-constrained Deep Learning of Multi-zone Building Thermal Dynamics

no code implementations11 Nov 2020 Jan Drgona, Aaron R. Tuor, Vikas Chandan, Draguna L. Vrabie

The proposed method is based on the systematic encoding of physics-based prior knowledge into a structured recurrent neural architecture.

Learning Constrained Adaptive Differentiable Predictive Control Policies With Guarantees

2 code implementations23 Apr 2020 Jan Drgona, Aaron Tuor, Draguna Vrabie

We present differentiable predictive control (DPC), a method for learning constrained neural control policies for linear systems with probabilistic performance guarantees.

Continuous Control Imitation Learning +1

Constrained Neural Ordinary Differential Equations with Stability Guarantees

1 code implementation ICLR Workshop DeepDiffEq 2019 Aaron Tuor, Jan Drgona, Draguna Vrabie

Differential equations are frequently used in engineering domains, such as modeling and control of industrial systems, where safety and performance guarantees are of paramount importance.

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