Department of Engineering Sciences: Nye registreringer
Viser treff 61-80 av 1119
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Pressure-flow dynamics with semi-stable limit cycles in hydraulic cylinder circuits
(Chapter, 2021)In hydraulic circuits of the standard fluid-power actuators and mechanisms, like the linear-stroke cylinders, some hydrodynamic effects are often neglected. It happens mainly due to their complexity and secondariness in ... -
Autonomous mooring towards autonomous maritime navigation and offshore operations
(Chapter, 2020)Bollard is a vital component of mooring system. It is the anchor point for mooring ropes to be fixed in order to secure the vessel or ship. An algorithm that translates the segmented mask of bollard output from masked R-CNN ... -
Sensitivity Analysis Of Online Oil Quality Monitoring For Early Detection Of Water Ingress In Marine Propulsion Systems
(Peer reviewed; Journal article, 2020)Gearboxes are critical equipment in the vessel propulsion system. Lubrication contamination caused by water ingress or condensation is one of the major failure modes in marine gearboxes leading to accelerated aging of ... -
Practice for determining friction in hydraulic winch systems
(Peer reviewed; Journal article, 2020)This paper presents a method for estimating friction in hydraulic active heave compensated (AHC) offshore winches. The method is a two-step approach where the first step is to model the friction loss in the hydraulic motors ... -
Steady state counterbalance valve modeling with the inuence of synthetic ester oils using CFD
(Peer reviewed; Journal article, 2020)This study looks in details at the effects of synthetic esters being applied to a counterbalance valve from the perspective of a system engineer. There is limited literature on the subject of applied synthetic esters and ... -
The Recombination Parameter γ : Modeling and Comments
(Journal article; Peer reviewed, 2023)The recombination parameter γ appears in mathematical expressions for the temperature coefficient of solar cells. This work presents a new analytical expression for this parameter. The expression is derived assuming that ... -
Experimental Evaluation of Homogeneous Differentiators Applied to Hydraulic Stroke with Measurement Noise and Acceleration Disturbance
(Chapter, 2024)The design and experimental evaluation of continuous homogeneous differentiators are considered. The differentiator gains follow the high-gain setup with variable gain-scaling parameter L. This parameter results from a ... -
Bollard Segmentation and Position Estimation From Lidar Point Cloud for Autonomous Mooring
(Peer reviewed; Journal article, 2021)This article presents a computer-aided object detection and localization method from lidar 3-D point cloud data. This topic of interest is in the framework of autonomous mooring, where the ship is tied to the rigid structure ... -
Adaptive Backstepping Control of Uncertain Nonlinear Systems with Input and State Quantization
(Peer reviewed; Journal article, 2021)Although it is common in network control systems that the sensor and control signals are transmitted via a common communication network, no result is available in investigating the stabilization problem for uncertain ... -
Modeling and field-experiments identification of vertical dynamics of vehicle with active anti-roll bar
(Chapter, 2020)This paper deals with modeling and identification of vertical dynamics of the ground vehicle equipped with two active anti-roll torsion bars. A series of field tests of a full-scale drive have been performed, from which ... -
Formulation of a consistent crack width calculation method for reinforced concrete members
(Doctoral dissertations at University of Agder;no. 473, Doctoral thesis, 2024)Predicting crack widths in reinforced concrete structures is essential for Serviceability Limit State (SLS) Design. Crack widths that exceed a certain limit may impair the functionality of a structure, limit its use and ... -
Machine learning and IMU: Smart Gait applications for use in real-time systems
(Master thesis, 2024)Inertial Measurement Units hold a great potential for real-time gait phase measurements, gait kinematics measurement, and gait analysis. They offer convenience in the form of their light weight and portability. There are ... -
Numerical Simulation on Effect of Separator Thickness on Coupling Phenomena in Single Cell of PEFC under Higher Temperature Operation Condition at 363 K and 373 K
(Peer reviewed; Journal article, 2023)In hydrogen energy systems, the polymer electrolyte fuel cell (PEFC) is an important component. The purpose of this study is to clarify the effect of separator thickness (s.t.) in PEFC on the distributions of mass such as ... -
Experimental investigation of two shared mooring configurations for a dual-spar floating offshore wind farm in irregular waves
(Peer reviewed; Journal article, 2024)Shared mooring brings potential cost benefits to a floating wind farm. In such a wind farm, adjacent floaters are connected by shared lines and the total number of mooring lines is reduced. This paper presents an experimental ... -
Viscoelastic characterization and comparison of Norwegian asphalt mixtures using dynamic modulus and IDT tests
(Chapter; Peer reviewed, 2021)This paper presents the comparison of stiffnesses of two types of asphalt concrete mixes (Ab11 and Agb11) fabricated in the laboratory using two commonly used stiffness tests. (1) uniaxial compression dynamic modulus (E*) ... -
A Novel Control Design for Realizing Passive Load-Holding Function on a Two-Motor-Two-Pump Motor-Controlled Hydraulic Cylinder
(Peer reviewed; Journal article, 2023)When a hydraulic cylinder connects two chambers directly to one or two hydraulic pumps driven by electric servo motors without any control valve in between, it can be called a motor-controlled hydraulic cylinder (MCC). ... -
Ensemble Machine Learning for Predicting the Power Output from Different Solar Photovoltaic Systems
(Peer reviewed; Journal article, 2023)In this paper, ensemble-based machine learning models with gradient boosting machine and random forest are proposed for predicting the power production from six different solar PV systems. The models are based on three ... -
Orientation-Independent Human Activity Recognition Using Complementary Radio Frequency Sensing
(Peer reviewed; Journal article, 2023)RF sensing offers an unobtrusive, user-friendly, and privacy-preserving method for detecting accidental falls and recognizing human activities. Contemporary RF-based HAR systems generally employ a single monostatic radar ... -
Combined Heat and Power Economic Dispatching within Energy Network using Hybrid Metaheuristic Technique
(Peer reviewed; Journal article, 2023)Combined heat and power (CHP) plants have opportunities to work as distributed power generation for providing heat and power demand. Furthermore, CHP plants contribute effectively to overcoming the intermittence of renewable ... -
Optimal Utilization of Charging Resources of Fast Charging Station with Opportunistic Electric Vehicle Users
(Peer reviewed; Journal article, 2023)The key challenge with the rapid proliferation of electric vehicles (EVs) is to optimally manage the available energy charging resources at EV fast-charging stations (FCSs). Furthermore, the rapid deployment of fast-charging ...