no code implementations • 21 Feb 2023 • Jishnudeep Kar, He Bai, Aranya Chakrabortty
We develop data-driven reinforcement learning (RL) control designs for input-affine nonlinear systems.
no code implementations • 10 Mar 2022 • Lu An, Pratishtha Shukla, Aranya Chakrabortty, Alexandra Duel-Hallen
We develop investment approaches to secure electric power systems against load attacks where a malicious intruder (the attacker) covertly changes reactive power setpoints of loads to push the grid towards voltage instability while the system operator (the defender) employs reactive power compensation (RPC) to prevent instability.
no code implementations • 26 Feb 2022 • Gangshan Jing, He Bai, Jemin George, Aranya Chakrabortty, Piyush K. Sharma
Achieving distributed reinforcement learning (RL) for large-scale cooperative multi-agent systems (MASs) is challenging because: (i) each agent has access to only limited information; (ii) issues on convergence or computational complexity emerge due to the curse of dimensionality.
Multi-agent Reinforcement Learning reinforcement-learning +1
no code implementations • 10 Jan 2022 • Gangshan Jing, He Bai, Jemin George, Aranya Chakrabortty, Piyush. K. Sharma
In this work, we study MARLs with directed coordination graphs, and propose a distributed RL algorithm where the local policy evaluations are based on local value functions.
Multi-agent Reinforcement Learning reinforcement-learning +1
no code implementations • 8 Sep 2021 • Rahul Chakraborty, Aranya Chakrabortty, Evangelos Farantatos, Mahendra Patel, Hossein Hooshyar, Atena Darvishi
We propose a novel hierarchical frequency and voltage control design for multi-area power system integrated with inverter-based resources (IBRs).
no code implementations • 26 Jul 2021 • Gangshan Jing, He Bai, Jemin George, Aranya Chakrabortty, Piyush K. Sharma
Recently introduced distributed zeroth-order optimization (ZOO) algorithms have shown their utility in distributed reinforcement learning (RL).
no code implementations • 26 Apr 2021 • Kaoru Teranishi, Tomonori Sadamoto, Aranya Chakrabortty, Kiminao Kogiso
Based on these two tractable new notions, we propose a systematic method for designing the both of an optimal key length to prevent system identification with a given precision within a given life span of systems, and of an optimal controller to maximize both of the control performance and the difficulty of the identification.
no code implementations • 16 Oct 2020 • Gangshan Jing, He Bai, Jemin George, Aranya Chakrabortty
Conditions for decomposability, an algorithm for constructing the transformation matrix, a parallel RL algorithm, and robustness analysis when the design is applied to non-homogeneous MAS are presented.
Hierarchical Reinforcement Learning Reinforcement Learning (RL)
no code implementations • 14 Aug 2020 • Gangshan Jing, He Bai, Jemin George, Aranya Chakrabortty
The first component optimizes the performance of each independent cluster by solving the smaller-size LQR design problem in a model-free way using an RL algorithm.
no code implementations • 29 Apr 2020 • Sayak Mukherjee, He Bai, Aranya Chakrabortty
We present a set of model-free, reduced-dimensional reinforcement learning (RL) based optimal control designs for linear time-invariant singularly perturbed (SP) systems.
1 code implementation • 26 Mar 2020 • Rachel Minster, Arvind K. Saibaba, Jishnudeep Kar, Aranya Chakrabortty
Eigensystem Realization Algorithm (ERA) is a data-driven approach for subspace system identification and is widely used in many areas of engineering.
Numerical Analysis Numerical Analysis