Browsing Institutt for maskinteknikk og produksjon by Title
Now showing items 2467-2486 of 4001
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Model-Based and Model-Free Optimal Control of a Gas Liquid Cylindrical Cyclone
(Journal article; Peer reviewed, 2018)Optimal control is important in the oil and gas industry, where small changes of process variables may have significant economical, environmental and safety impacts. Finding the optimal setpoint for a controlled variable ... -
Model-based maintenance optimization
(Master thesis, 2021)The thesis aims to apply a model-based assessment for the different maintenance policies possible for a system and thereby aid the engineers in choosing the optimal maintenance policy. For this purpose, a system of separators ... -
Model-based Sustainability Assessment - An Enabler for Transition to Sustainable Manufacturing
(Journal article; Peer reviewed, 2016)The “sustainable manufacturing” concept has been discussed by researchers and manufacturers for decades. Still, a transition to sustainable manufacturing is limited due to constraints such as the lack of a practical ... -
Modelica Component Models for Non-diffracting Floating Objects and Quasi-static Catenary Moorings
(Chapter, 2020)In this paper, the theory behind determining the hydrodynamic response of a floating object in the presence of waves is discussed, followed by a simplification for the case of wave-transparent objects. The Morison equation ... -
Modelica Component Models for Oceanic Surface Waves and Depth Varying Current
(Chapter, 2020)In this paper, the theory of progressive ocean-surface gravity-waves is discussed, followed by the concept of the representation of the irregular sea-state by a sea spectrum. Fourier series decomposition of the irregular ... -
Modeling and Control of a Bifilar Crane Payload
(Journal article; Peer reviewed, 2018)This paper presents a modeling technique and a controller for an underactuated crane payload. The crane payload is modeled as a bifilar pendulum. The payload is attached to a sheave block, such that a cable can freely run ... -
Modeling and Control of Shipmounted Cranes
(Doctoral theses at NTNU;2020:225, Doctoral thesis, 2020)This thesis presents methods and theory for the mathematical modeling of crane-ship systems and controllers for ship-mounted cranes and crane loads. The thesis contains a collection of four journal papers and one conference ... -
Modeling and nonlinear model predictive control of a subsea pump station
(Journal article; Peer reviewed, 2017)In this paper we present a model of a pump station consisting of two pumps in parallel with a recycle line, and a nonlinear Model Predictive Control strategy for said pump station with suction pressure as the controlled ... -
Modeling and Simulation of Borregaard's Steam System - Construction, Validation and Utilization of the Model
(Master thesis, 2016)The steam-system at Borregaard Sarpsborg big process plant consists of several kilometers of pipelines and different pressure-systems. The steam-system is the most important secondary aid system to Borregaard's main ... -
Modeling and Simulation of the Human Body
(Master thesis, 2016)The theme of this Master Thesis is modeling and simulation of the musculoskeletal system. The purpose is to explore new ways to diagnose the human body, and do so effectively by automation. This Master Thesis investigates ... -
Modeling and Testing of Impact Damage in Composite Pressure Vessels
(Master thesis, 2015)Composite pressure vessels are becoming widely used for transporting gas, lately also hydrogen. In order to enable extensive use of the pressure vessels, it is critical to ensure their societal acceptance, and thus safety ... -
Modeling and testing of small diameter composite tubes under hydrostatic pressure
(Master thesis, 2014)This thesis investigates the behavior of small diameter composite tubes that are exposed to external pressure. Composite tubes have a superior strength to weight ratio compared to steel tubes. The oil industry is facing ... -
Modeling Biological Nutrient Removal in a Greywater Treatment System
(Master thesis, 2015)Many urban centers suffer water scarcity due to increased population growth and dry periods. There has been an increased interest in developing alternative water sources for supplementing the existing urban water supply ... -
Modeling Blowouts During Drilling Using STAMP and STPA
(Master thesis, 2012)The focus of this master thesis has been on modeling the risk of blowouts during drilling using System-Theoretic Accident Model and Processes (STAMP) and System-Theoretic Process Analysis (STPA). The world and technology ... -
Modeling contaminant flows from the U.S. iron and steelsector
(Master thesis, 2009) -
Modeling Cyberattack Propagation and Impacts on Cyber-Physical System Safety: An Experiment
(Peer reviewed; Journal article, 2022)In this article, we present an experiment we conducted with discrete event simulations to analyze the effects of multi-step cyberattacks on the safety of cyber-physical systems. We show how to represent systems, their ... -
Modeling Degradation for Prognosis in a Complex Environment - From a Physics-Based Perspective
(Master thesis, 2021)Med den pågående trenden av automatisering og datautveksling i produksjonsteknologier, kjent som Industry 4.0, har vedlikehold utviklet seg til å bli en viktig funksjon i industrien. Modellering av degradering og prognose ... -
Modeling for evaluation of safety instrumented systems with heterogeneous components
(Peer reviewed; Journal article, 2021)A novel methodology for evaluation of safety instrumented systems (SISs) with heterogeneous components based on multi-stage dynamic Bayesian networks (MDBNs) is proposed. The unified evaluation model for M-out-of-N ... -
Modeling Human and Organizational Factors for Operational Risk Analysis
(Master thesis, 2016)In terms of accident sequences in the offshore oil and gas industry, technical factors have been focused on the risk analysis area widely. However, there are still accidents and losses occurred frequently. To understand ... -
Modeling of Fatigue from Random Corrosion Pits
(Master thesis, 2015)This master thesis is a continuation of the project work Fatigue Assessment of Mechanical Components with Random Surface Defects written during the fall of 2015. Central tasks of this report has been to create a manual ...