Search Results for author: Aaron Tuor

Found 22 papers, 7 papers with code

Domain-aware Control-oriented Neural Models for Autonomous Underwater Vehicles

no code implementations15 Aug 2022 Wenceslao Shaw Cortez, Soumya Vasisht, Aaron Tuor, Ján Drgoňa, Draguna Vrabie

Conventional physics-based modeling is a time-consuming bottleneck in control design for complex nonlinear systems like autonomous underwater vehicles (AUVs).

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.

Neural Lyapunov Differentiable Predictive Control

no code implementations22 May 2022 Sayak Mukherjee, Ján Drgoňa, Aaron Tuor, Mahantesh Halappanavar, Draguna Vrabie

We present a learning-based predictive control methodology using the differentiable programming framework with probabilistic Lyapunov-based stability guarantees.

Model Predictive Control

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

Learning Stochastic Parametric Differentiable Predictive Control Policies

1 code implementation2 Mar 2022 Ján Drgoňa, Sayak Mukherjee, Aaron Tuor, Mahantesh Halappanavar, Draguna Vrabie

The problem of synthesizing stochastic explicit model predictive control policies is known to be quickly intractable even for systems of modest complexity when using classical control-theoretic methods.

Computational Efficiency Model Predictive Control

Neural Ordinary Differential Equations for Nonlinear System Identification

no code implementations28 Feb 2022 Aowabin Rahman, Ján Drgoňa, Aaron Tuor, Jan Strube

In particular, we present a quantitative study comparing NODE's performance against neural state-space models and classical linear system identification methods.

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

Prototypical Region Proposal Networks for Few-Shot Localization and Classification

no code implementations8 Apr 2021 Elliott Skomski, Aaron Tuor, Andrew Avila, Lauren Phillips, Zachary New, Henry Kvinge, Courtney D. Corley, Nathan Hodas

Recently proposed few-shot image classification methods have generally focused on use cases where the objects to be classified are the central subject of images.

Classification Few-Shot Image Classification +2

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.

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

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.

Systematic Evaluation of Backdoor Data Poisoning Attacks on Image Classifiers

no code implementations24 Apr 2020 Loc Truong, Chace Jones, Brian Hutchinson, Andrew August, Brenda Praggastis, Robert Jasper, Nicole Nichols, Aaron Tuor

First, the success rate of backdoor poisoning attacks varies widely, depending on several factors, including model architecture, trigger pattern and regularization technique.

Data Poisoning

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.

Multiple Document Representations from News Alerts for Automated Bio-surveillance Event Detection

no code implementations17 Feb 2019 Aaron Tuor, Fnu Anubhav, Lauren Charles

Due to globalization, geographic boundaries no longer serve as effective shields for the spread of infectious diseases.

Classification Event Detection +3

Recurrent Neural Network Attention Mechanisms for Interpretable System Log Anomaly Detection

no code implementations13 Mar 2018 Andy Brown, Aaron Tuor, Brian Hutchinson, Nicole Nichols

Deep learning has recently demonstrated state-of-the art performance on key tasks related to the maintenance of computer systems, such as intrusion detection, denial of service attack detection, hardware and software system failures, and malware detection.

Anomaly Detection Intrusion Detection +1

Recurrent Neural Network Language Models for Open Vocabulary Event-Level Cyber Anomaly Detection

1 code implementation2 Dec 2017 Aaron Tuor, Ryan Baerwolf, Nicolas Knowles, Brian Hutchinson, Nicole Nichols, Rob Jasper

By treating system logs as threads of interleaved "sentences" (event log lines) to train online unsupervised neural network language models, our approach provides an adaptive model of normal network behavior.

Anomaly Detection Feature Engineering

Deep Learning for Unsupervised Insider Threat Detection in Structured Cybersecurity Data Streams

1 code implementation2 Oct 2017 Aaron Tuor, Samuel Kaplan, Brian Hutchinson, Nicole Nichols, Sean Robinson

As a prospective filter for the human analyst, we present an online unsupervised deep learning approach to detect anomalous network activity from system logs in real time.

Anomaly Detection

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