Browsing NTNU Open by Author "Hasan, Agus Ismail"
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Adaptive Boundary Observer for Nonlinear Hyperbolic Systems: Design and Field Testing in Managed Pressure Drilling
Hasan, Agus Ismail (Journal article; Peer reviewed, 2015)The present paper develops an adaptive boundary observer for systems modeled by nonlinear hyperbolic PDEs with limited number of measurements. The design is based on the backstepping method and relies only on one boundary ... -
Boundary Observer Design for Hyperbolic PDE-ODE Cascade Systems
Hasan, Agus Ismail; Aamo, Ole Morten; Krstic, Miroslav (Journal article; Peer reviewed, 2016)The paper presents an observer design for a class of hyperbolic PDE–ODE cascade systems with a boundary measurement. The cascade systems consist of coupled PDEs, featuring one rightward and one leftward convecting first-order ... -
Design and Experimental Validation of Nonlinear Infinite-Dimensional Adaptive Observer in Automated Managed Pressure Drilling
Hasan, Agus Ismail; Imsland, Lars Struen; Hauge, Espen (Journal article; Peer reviewed, 2017)Utilizing flow rate and pressure data in and out of the fluid circulation loop provides a driller with real-time trends for early detection of well-control problems that impact the drilling efficiency. Due to limited number ... -
Digital Twin-Driven Actuator Fault Diagnosis for Autonomous Surface Vehicles
Bhagavathi, Ravitej; Kufoalor, Giorgio Minde; Hasan, Agus Ismail (Journal article; Peer reviewed, 2023)This paper presents a digital twin-driven fault diagnosis approach based on a graphical model and an adaptive extended Kalman filter algorithm for autonomous surface vehicles. In contrast with the traditional adaptive ... -
Digital twin-driven dynamic repositioning of floating offshore wind farms
Kandemir, Ege; Liu, Jincheng; Hasan, Agus Ismail (Journal article; Peer reviewed, 2023)This paper presents a novel approach to optimize wind farm layout during operation based on digital twin and dynamic repositioning. The technology offers a possibility to increase the total energy production of floating ... -
Digital twin-driven energy modeling of Hywind Tampen floating wind farm
Qaiser, Muhammad Talal; Ejaz, Jasim; Osen, Ottar Laurits; Hasan, Agus Ismail (Peer reviewed; Journal article, 2023)This paper presents energy modeling of Hywind Tampen floating wind farm based on digital twin technology. Upon its completion, the Hywind Tampen wind farm is the largest floating wind farm in the World and the first floating ... -
Disturbance Attenuation of n+1 Coupled Hyperbolic PDEs
Hasan, Agus Ismail (Journal article; Peer reviewed, 2015)In this paper, we present a state-feedback and a state-observer for disturbance attenuation problems for a class of n + 1 coupled linear hyperbolic partial differential equations. The disturbance and the sensing are located ... -
eXogenous Kalman Filter for State-of-Charge Estimation in Lithium-ion Batteries
Hasan, Agus Ismail; Skriver, M; Johansen, Tor Arne (Journal article; Peer reviewed, 2018)This paper presents State-of-Charge (SoC) estimation of lithium-ion batteries using eXogenous Kalman filter (XKF). The state-space equation for the lithium-ion battery is obtained from the equivalent circuit model (ECM). ... -
Infinite-Dimensional Observer for Process Monitoring in Managed Pressure Drilling
Hasan, Agus Ismail (Journal article; Peer reviewed, 2015)Utilizing flow rate and pressure data in and out of the mud circulation loop provides a driller with real-time trends for the early detection of well-control problems that impact the drilling efficiency. This paper presents ... -
Model-Based Fault Diagnosis Algorithms for Robotic Systems
Hasan, Agus Ismail; Tahavori, Maryamsadat; Midtiby, Henrik (Journal article; Peer reviewed, 2023) -
A new estimation method for COVID-19 time-varying reproduction number using active cases
Hasan, Agus Ismail; Susanto, Hadi; Tjahjono, Venansius; Kusdiantara, Rudy; Putri, Endah; Nuraini, Nuning; Hadisoemarto, Panji (Peer reviewed; Journal article, 2022)We propose a new method to estimate the time-varying effective (or instantaneous) reproduction number of the novel coronavirus disease (COVID-19). The method is based on a discrete-time stochastic augmented compartmental ... -
A numerical framework for estimating the effective reproduction number of infectious diseases from compartmental epidemic models
Hasan, Agus Ismail (Peer reviewed; Journal article, 2021)We present a numerical framework for estimating the effective reproduction number of infectious diseases from compartmental epidemic models. The idea is to augment the reproduction number as an extended state variable in ... -
Predictive digital twin for offshore wind farms
Haghshenas, Amirashkan; Hasan, Agus Ismail; Osen, Ottar Laurits; Mikalsen, Egil Tennfjord (Peer reviewed; Journal article, 2023)As wind turbines continue to grow in size, they are increasingly being deployed offshore. This causes operation and maintenance of wind turbines becoming more challenging. Digitalization is a key enabling technology to ... -
Temporal Topology Density Map
Hu, Zhicheng; Hojjati, Amirabbas; Haghshenas, Amirashkan; Hasan, Agus Ismail; Da Silva Torres, Ricardo (Peer reviewed; Journal article, 2023)Spatiotemporal data visualization is of paramount importance in several applications, especially for analyzing urban mobility data encoded on topologies. This paper introduces a novel solution, called Temporal Topology ... -
Towards fully autonomous floating offshore wind farm operation & maintenance
Ambarita, Evi Elisa; Karlsen, Anniken Susanne Thoresen; Osen, Ottar Laurits; Hasan, Agus Ismail (Peer reviewed; Journal article, 2023)Wind energy is one of the most versatile and promising sustainable energy solutions. Wind energy can be harvested in both onshore and offshore environments. Due to the environmental and societal impacts of onshore wind ...