2 citations · 9 across the 21 of their papers we have counts for
24 papers
State-Robust Observability Measures for Sensor Selection in Nonlinear Dynamic Systems
Mohamad H. Kazma, Sebastian A. Nugroho, Aleksandar Haber +1
This paper explores the problem of selecting sensor nodes for a general class of nonlinear dynamical networks. In particular, we study the problem by utilizing altered definitions…
On Differential Privacy and Traffic State Estimation Problem for Connected Vehicles
Suyash C. Vishnoi, Ahmad F. Taha, Sebastian A. Nugroho +1
This letter focuses on the problem of traffic state estimation for highway networks with junctions in the form of on- and off-ramps while maintaining differential privacy of traffi…
Traffic State Estimation for Connected Vehicles using the Second-Order Aw-Rascle-Zhang Traffic Model
Suyash C. Vishnoi, Sebastian A. Nugroho, Ahmad F. Taha +1
This paper addresses the problem of traffic state estimation (TSE) in the presence of heterogeneous sensors which include both fixed and moving sensors. Traditional fixed sensors a…
Dynamic State Estimation of Nonlinear Differential Algebraic Equation Models of Power Networks
Muhammad Nadeem, Sebastian A. Nugroho, Ahmad F. Taha
This paper investigates the joint problems of dynamic state estimation of algebraic variables (voltage and phase angle) and generator states (rotor angle and frequency) of nonlinea…
Observers for Differential Algebraic Equation Models of Power Networks: Jointly Estimating Dynamic and Algebraic States
Sebastian Nugroho, Ahmad Taha, Nikolaos Gatsis +1
Phasor measurement units ({PMUs}) have become instrumental in modern power systems for enabling real-time, wide-area monitoring and control. Accordingly, many studies have investig…
Where Should Traffic Sensors Be Placed on Highways?
Sebastian A. Nugroho, Suyash C. Vishnoi, Ahmad F. Taha +2
This paper investigates the practical engineering problem of traffic sensors placement on stretched highways with ramps. Since it is virtually impossible to install bulky traffic s…
Case Study on Detecting COVID-19 Health-Related Misinformation in Social Media
Mir Mehedi A. Pritom, Rosana Montanez Rodriguez, Asad Ali Khan +4
COVID-19 pandemic has generated what public health officials called an infodemic of misinformation. As social distancing and stay-at-home orders came into effect, many turned to so…
Feedback Stabilization and Output Tracking for Discrete-Time Lipschitz Nonlinear Systems via Iterative Convex Approximations
Sebastian A. Nugroho, Suyash C. Vishnoi, Ahmad F. Taha +1
The stabilization of unstable nonlinear systems and tracking control are challenging engineering problems due to the encompassed nonlinearities in dynamic systems and their scale.…
Load and Renewable-Following Control of Linearization-Free Differential Algebraic Equation Power System Models
Sebastian A. Nugroho, Ahmad F. Taha
Electromechanical transients in power networks are mostly caused by a mismatch between power consumption and production, causing generators to deviate from the nominal frequency. T…
Towards Understanding Sensor and Control Nodes Selection in Nonlinear Dynamic Systems: Lyapunov Theory Meets Branch-and-Bound
Sebastian A. Nugroho, Ahmad F. Taha
Sensor and actuator selection problems (SASP) are some of the core problems in dynamic systems design and control. These problems correspond to determining the optimal selection of…
Control Node Selection Algorithm for Nonlinear Dynamic Networks
Aleksandar Haber, Sebastian A. Nugroho, Patricio Torres +1
The coupled problems of selecting control nodes and designing control actions for nonlinear network dynamics are fundamental scientific problems with applications in many diverse f…
Nonlinear Dynamic Systems Parameterization Using Interval-Based Global Optimization: Computing Lipschitz Constants and Beyond
Sebastian A. Nugroho, Ahmad F. Taha, and Vu Hoang
Numerous state-feedback and observer designs for nonlinear dynamic systems (NDS) have been developed in the past three decades. These designs assume that NDS nonlinearities satisfy…
Computing Lipschitz Constants for Hydraulic Models of Water Distribution Networks
Ramsey Shadfan, Shen Wang, Sebastian A. Nugroho +2
Drinking water distribution networks (WDN) are large-scale, dynamic systems spanning large geographic areas. Water networks include various components such as junctions, reservoirs…
Asymmetric Cell Transmission Model-Based, Ramp-Connected Robust Traffic Density Estimation under Bounded Disturbances
Suyash C. Vishnoi, Sebastian A. Nugroho, Ahmad F. Taha +2
In modern transportation systems, traffic congestion is inevitable. To minimize the loss caused by congestion, various control strategies have been developed most of which rely on…
New Insights on One-Sided Lipschitz and Quadratically Inner-Bounded Nonlinear Dynamic Systems
Sebastian A. Nugroho, Vu Hoang, Maria Radosz +2
Nonlinear dynamic systems can be classified into various classes depending on the modeled nonlinearity. These classes include Lipschitz, bounded Jacobian, one-sided Lipschitz (OSL)…
Sensor Placement Strategies for Some Classes of Nonlinear Dynamic Systems via Lyapunov Theory
Sebastian Nugroho, Ahmad F. Taha
In this paper, the problem of placing sensors for some classes of nonlinear dynamic systems (NDS) is investigated. In conjunction with mixed-integer programming, classical Lyapunov…
Robust Dynamic State Estimation of Synchronous Machines with Asymptotic State Estimation Error Performance Guarantees
Sebastian Nugroho, Ahmad F. Taha, Junjian Qi
A robust observer for performing power system dynamic state estimation (DSE) of a synchronous generator is proposed. The observer is developed using the concept of $\mathcal{L}_{\i…
Characterizing the Nonlinearity of Power System Generator Models
Sebastian A. Nugroho, Ahmad F. Taha, Junjian Qi
Power system dynamics are naturally nonlinear. The nonlinearity stems from power flows, generator dynamics, and electromagnetic transients. Characterizing the nonlinearity of the d…
A Control-Theoretic Approach for Scalable and Robust Traffic Density Estimation using Convex Optimization
Sebastian A. Nugroho, Ahmad F. Taha, Christian Claudel
Monitoring and control of traffic networks represent alternative, inexpensive strategies to minimize traffic congestion. As the number of traffic sensors is naturally constrained b…
Algorithms for Joint Sensor and Control Nodes Selection in Dynamic Networks
Sebastian A. Nugroho, Ahmad F. Taha, Nikolaos Gatsis +2
The problem of placing or selecting sensors and control nodes plays a pivotal role in the operation of dynamic networks. This paper proposes optimal algorithms and heuristics to so…
Simultaneous Sensor and Actuator Selection/Placement through Output Feedback Control
Sebastian Nugroho, Ahmad F. Taha, Tyler Summers +1
In most dynamic networks, it is impractical to measure all of the system states; instead, only a subset of the states are measured through sensors. Consequently, and unlike full st…
Dynamic Actuator Selection and Robust State-Feedback Control of Networked Soft Actuators
Nafiseh Ebrahimi, Sebastian Nugroho, Ahmad F. Taha +3
The design of robots that are light, soft, powerful is a grand challenge. Since they can easily adapt to dynamic environments, soft robotic systems have the potential of changing t…
Robust Control for Renewable-Integrated Power Networks Considering Input Bound Constraints and Worst-Case Uncertainty Measure
Ahmad F. Taha, Mohammadhafez Bazrafshan, Sebastian Nugroho +2
Uncertainty from renewable energy and loads is one of the major challenges for stable grid operation. Various approaches have been explored to remedy these uncertainties. In this p…
Time-Varying Sensor and Actuator Selection for Uncertain Cyber-Physical Systems
Ahmad F. Taha, Nikolaos Gatsis, Tyler Summers +1
We propose methods to solve time-varying, sensor and actuator (SaA) selection problems for uncertain cyber-physical systems. We show that many SaA selection problems for optimizing…