Search Results for author: Panagiotis Petsagkourakis

Found 12 papers, 5 papers with code

Tube-based Distributionally Robust Model Predictive Control for Nonlinear Process Systems via Linearization

1 code implementation26 Nov 2022 Zhengang Zhong, Ehecatl Antonio del Rio-Chanona, Panagiotis Petsagkourakis

Unlike SMPC, which requires the exact knowledge of the disturbance distribution, our scheme decides the control action with respect to the worst distribution from a distribution ambiguity set.

Model Predictive Control

Neural ODEs as Feedback Policies for Nonlinear Optimal Control

1 code implementation20 Oct 2022 Ilya Orson Sandoval, Panagiotis Petsagkourakis, Ehecatl Antonio del Rio-Chanona

Neural ordinary differential equations (Neural ODEs) define continuous time dynamical systems with neural networks.

Time Series Time Series Analysis

Integrating process design and control using reinforcement learning

no code implementations11 Aug 2021 Steven Sachio, Max Mowbray, Maria Papathanasiou, Ehecatl Antonio del Rio-Chanona, Panagiotis Petsagkourakis

For this, one can formulate a bilevel optimization problem, with the design as the outer problem in the form of a mixed-integer nonlinear program (MINLP) and a stochastic optimal control as the inner problem.

Bilevel Optimization reinforcement-learning +1

Safe Chance Constrained Reinforcement Learning for Batch Process Control

1 code implementation23 Apr 2021 Max Mowbray, Panagiotis Petsagkourakis, Ehecatl Antonio del Río Chanona, Dongda Zhang

Specifically, we propose a data-driven approach that utilizes Gaussian processes for the offline simulation model and use the associated posterior uncertainty prediction to account for joint chance constraints and plant-model mismatch.

Gaussian Processes Model Predictive Control +2

Safe model-based design of experiments using Gaussian processes

no code implementations19 Nov 2020 Panagiotis Petsagkourakis, Federico Galvanin

Construction of kinetic models has become an indispensable step in the development and scale up of processes in the industry.

Experimental Design Gaussian Processes +1

Constrained Model-Free Reinforcement Learning for Process Optimization

no code implementations16 Nov 2020 Elton Pan, Panagiotis Petsagkourakis, Max Mowbray, Dongda Zhang, Antonio del Rio-Chanona

We propose an 'oracle'-assisted constrained Q-learning algorithm that guarantees the satisfaction of joint chance constraints with a high probability, which is crucial for safety critical tasks.

Model Predictive Control Q-Learning +3

Chance Constrained Policy Optimization for Process Control and Optimization

no code implementations30 Jul 2020 Panagiotis Petsagkourakis, Ilya Orson Sandoval, Eric Bradford, Federico Galvanin, Dongda Zhang, Ehecatl Antonio del Rio-Chanona

We propose a chance constrained policy optimization (CCPO) algorithm which guarantees the satisfaction of joint chance constraints with a high probability - which is crucial for safety critical tasks.

Bayesian Optimization Chemical Process +2

Constrained Reinforcement Learning for Dynamic Optimization under Uncertainty

no code implementations4 Jun 2020 Panagiotis Petsagkourakis, Ilya Orson Sandoval, Eric Bradford, Dongda Zhang, Ehecatl Antonio del Río Chanona

We use chance constraints to guarantee the probabilistic satisfaction of process constraints, which is accomplished by introducing backoffs, such that the optimal policy and backoffs are computed simultaneously.

reinforcement-learning Reinforcement Learning (RL)

Reinforcement Learning for Batch Bioprocess Optimization

2 code implementations15 Apr 2019 Panagiotis Petsagkourakis, Ilya Orson Sandoval, Eric Bradford, Dongda Zhang, Ehecatl Antonio del Rio Chanona

In this work, we applied the Policy Gradient method from batch-to-batch to update a control policy parametrized by a recurrent neural network.

Optimization and Control Systems and Control

Input-Output Stability of Barrier-Based Model Predictive Control

1 code implementation7 Mar 2019 Panagiotis Petsagkourakis, William P. Heath, Joaquin Carrasco, Constantinos Theodoropoulos

Conditions for input-output stability of barrier-based model predictive control of linear systems with linear and convex nonlinear (hard or soft) constraints are established through the construction of integral quadratic constraints (IQCs).

Systems and Control

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