14 citations · 27 across the 18 of their papers we have counts for
20 papers
Comprehensive Dynamic Modeling and Constraint-Aware Air Supply Control for Localized Water Management in Automotive Polymer Electrolyte Membrane Fuel Cells
Mostafaali Ayubirad, Zeng Qiu, Hao Wang +3
In this paper, a predictive constraint-aware control scheme is formulated within the Command Governor (CG) framework for localized hydration management of a proton exchange membran…
Improved Voltage Regulation with Optimal Design of Decentralized Volt-VAr Control
Daniel Russell, Dakota Hamilton, Mads R. Almassalkhi +1
Integration of distributed energy resources has created a need for autonomous, dynamic voltage regulation. Decentralized Volt-VAr Control (VVC) of grid-connected inverters presents…
CPU- and GPU-Based Parallelization of the Robust Reference Governor
Hamid R. Ossareh, William Shayne, Samuel Chevalier
Constraint management is a central challenge in modern control systems. A solution is the Reference Governor (RG), which is an add-on strategy to pre-stabilized feedback control sy…
Vertex addition to a ball graph with application to reliability and area coverage in autonomous swarms
Calum Buchanan, Puck Rombach, James Bagrow +1
A unit ball graph consists of a set of vertices, labeled by points in Euclidean space, and edges joining all pairs of points within distance 1. These geometric graphs are used to m…
Modeling and Constraint-Aware Control of Pressure Dynamics in Water Electrolysis Systems
Mostafaali Ayubirad, Madiha Akbar, Hamid R. Ossareh
This paper addresses the challenge of pressure constraint violations in water electrolysis systems operating under dynamic power conditions, a problem common to both Proton Exchang…
A Neural Network-based Multi-timestep Command Governor for Nonlinear Systems with Constraints
Mostafaali Ayubirad, Hamid R. Ossareh
The multi-timestep command governor (MCG) is an add-on algorithm that enforces constraints by modifying, at each timestep, the reference command to a pre-stabilized control system.…
Transformer Temperature Management and Voltage Control in Electric Distribution Systems with High Solar PV Penetration
Amirhossein Ghorbansarvi, Dakota Hamilton, Mads R. Almassalkhi +1
The increasing penetration of photovoltaic (PV) systems in distribution grids can lead to overvoltage and transformer overloading issues. While voltage regulation has been extensiv…
A Machine Learning-Based Reference Governor for Nonlinear Systems With Application to Automotive Fuel Cells
Mostafaali Ayubirad, Hamid R. Ossareh
The prediction-based nonlinear reference governor (PRG) is an add-on algorithm to enforce constraints on pre-stabilized nonlinear systems by modifying, whenever necessary, the refe…
Power-Duration Characterization of Aggregated Thermostatically Controlled Loads via Reach and Hold Sets
Mazen Elsaadany, Hamid R. Ossareh, Mads R. Almassalkhi
Aggregations of thermostatically controlled loads (TCLs), such as air conditioners, offer valuable flexibility to the power grid. The aggregate power consumption of a TCL fleet can…
Uncertainty Quantification of Data-Driven Output Predictors in the Output Error Setting
Farzan Kaviani, Ivan Markovsky, Hamid R. Ossareh
We revisit the problem of predicting the output of an LTI system directly using offline input-output data (and without the use of a parametric model) in the behavioral setting. Exi…
Data-driven System Interconnections and a Novel Data-enabled Internal Model Control
Yasaman Pedari, Jaeho Lee, Yongsoon Eun +1
Over the past two decades, there has been a growing interest in control systems research to transition from model-based methods to data-driven approaches. In this study, we aim to…
On Complexity Bounds for the Maximal Admissible Set of Linear Time-Invariant Systems
Hamid R. Ossareh, Ilya Kolmanovsky
Given a dynamical system with constrained outputs, the maximal admissible set (MAS) is defined as the set of all initial conditions such that the output constraints are satisfied f…
Hierarchical Fuel-Cell Airpath Control: an Efficiency-Aware MIMO Control Approach Combined with a Novel Constraint-Enforcing Reference Governor
Eli Bacher-Chong, Mostafa Ali Ayubirad, Zeng Qiu +3
This paper presents a hierarchical multivariable control and constraint management approach for an air supply system for a proton exchange membrane fuel cell (PEMFC) system. The co…
Statistical Modeling and Forecasting of Automatic Generation Control Signals
Sarnaduti Brahma, Hamid R. Ossareh, Mads R. Almassalkhi
The performance of frequency regulating units for automatic generation control (AGC) of power systems depends on their ability to track the AGC signal accurately. In addition, repr…
Optimal Frequency Regulation using Packetized Energy Management
Sarnaduti Brahma, Adil Khurram, Hamid Ossareh +1
Packetized energy management (PEM) is a demand dispatch scheme that can be used to provide ancillary services such as frequency regulation. In PEM, distributed energy resources (DE…
Preview Reference Governors: A Constraint Management Technique for Systems With Preview Information
Yudan Liu, Hamid Ossareh
This paper presents a constraint management strategy based on Scalar Reference Governors (SRG) to enforce output, state, and control constraints while taking into account the previ…
Decoupled Reference Governors: A Constraint Management Technique for MIMO Systems
Yudan Liu, Joycer Osorio, Hamid R. Ossareh
This paper presents a computationally efficient solution for constraint management of multi-input and multi-output (MIMO) systems. The solution, referred to as the Decoupled Refere…
Optimal and resilient coordination of virtual batteries in distribution feeders
Sarnaduti Brahma, Nawaf Nazir, Hamid Ossareh +1
This paper presents a novel hierarchical framework for real-time, network-admissible coordination of responsive grid resources aggregated into virtual batteries (VBs). In this cont…
Stochastic Linearization of Multivariate Nonlinearities
Sarnaduti Brahma, Hamid R. Ossareh
Stochastic linearization is a method used in Quasilinear Control (QLC) to replace a nonlinearity by an equivalent gain and a bias, utilizing the statistical properties of random in…
Reference Governors and Maximal Output Admissible Sets for Linear Periodic Systems
Hamid R. Ossareh
In this paper, we consider the problem of constraint management in Linear Periodic (LP) systems using Reference Governors (RG). First, we present the periodic-invariant maximal out…