Browsing NTNU Open by Author "Johansen, Tor Arne"
Now showing items 101-120 of 521
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Comparison of Nonlinearity Measures based on Time Series Analysis for Nonlinearity Detection
Hosseini, SeyedMehrdad; Johansen, Tor Arne; Fatehi, A (Journal article; Peer reviewed, 2011)The main purpose of this paper is a study of the efficiency of different nonlinearity detection methods based on time-series data from a dynamic process as a part of system identification. A very useful concept in measuring ... -
Compensation for wave motion in dynamic positioning of autonomous vessels
Halvorsen, Håkon Skogland (Master thesis, 2020)Abstract will be available on 2023-06-21 -
A Constrained Control Allocation and Tuning Scheme for Hybrid Actuators in Spacecraft Attitude Control
Grøtte, Mariusz Eivind; Gravdahl, Jan Tommy; Johansen, Tor Arne (Peer reviewed; Journal article, 2023)Agile rotational maneuvers of spacecraft requires careful execution since its actuators may not be able to produce the demanded torques, causing the state trajectories to deviate and a desired attitude would not be guaranteed. ... -
Contact detection for autonomous boats using machine learning
Kristiansen, Kjetil Sekse (Master thesis, 2021) -
Contingency Path Planning for Hybrid-electric UAS
Hovenburg, Anthony Reinier; Andrade, Fabio; Rodin, Christopher D; Johansen, Tor Arne (Chapter, 2017)This article presents a path planning optimization method which aims to mitigate the risks in the event of a critical engine or generator failure in hybrid-electric UAS. This is achieved through continuous determination ... -
Control and Adaptive Observer Designs for Managed Pressure and Under Balanced Drilling
Nikoofard, Amirhossein (Doctoral thesis at NTNU;2016:24, Doctoral thesis, 2016) -
Control Architecture Design for the Path-Following Problem and Attitude/Speed Control of a fixed-wing Unmanned Aerial Vehicle
Vaage, Tobias (Master thesis, 2021)Ubemannede fly blir mer og mer autonome, og denne avhandlingen har som formål å belyse noen aspekter ved dette. Hovedoppgavene i denne avhandlingen baserer seg på identifisering av en matematisk modell for UAV, orienterings- ... -
Control Design for Backstepping and Adaptive Backstepping Controllers in MPD
Johansen, Martin Bergene (Master thesis, 2017)In the field of oil drilling there is a concept known as Managed Pressure Drilling. In Managed Pressure Drilling one relies on pumps in combination with chokes (valves) in order to maintain a certain pressure at the bottom ... -
Control of a Permanent Magnet Synchronous Motor (PMSM) with constraints
Rai, Shiv Jeet (Master thesis, 2017)The aim of the thesis is to design and implement a controller that controls the PMSM without violating the given constraints. This is especially with respect to the battery current. Two approaches has been implemented in ... -
Control of an End Body Towed by a Circling Unmanned Aerial Vehicle
Merz, Mariann; Johansen, Tor Arne (Journal article; Peer reviewed, 2019)The melting of the Arctic ice cap leads to increased commercial interest in these maritime regions, such as shipping via the Northeast Passage and oil and gas exploration, leading to a need to develop new long-range unmanned ... -
Control of Fixed-Wing UAVs in Icing Conditions Using Nonlinear Model Predictive Control
Ghindaoanu, Nadine Adelina (Master thesis, 2023)Etterhvert som bruken av små ubemannede luftfartøy (UAV) øker, etterlyses regulatorer som er i stand til å operere under krevende værforhold. I denne oppgaven blir NMPC (nonlinear model predictive control) utforsket, hvor ... -
Control System Architecture for Automatic Recovery of Fixed-Wing Unmanned Aerial Vehicles in a Moving Arrest System
Gryte, Kristoffer; Sollie, Martin Lysvand; Johansen, Tor Arne (Journal article; Peer reviewed, 2021)Automatic recovery is an important step in enabling fully autonomous missions using fixed-wing unmanned aerial vehicles (UAVs) operating from ships or other moving platforms. However, automatic recovery in moving arrest ... -
Control system for the DNV GL Fuel Fighter Prototype and the DNV GL Fuel Fighter UrbanConcept
Trømborg, Håkon (Master thesis, 2014)In this report I present my work developing the main control unit in the two DNV GL Fuel Fighter cars that raced in Shell Eco-marathon 2014. The objective of the Shell Eco-marathon is to race a set distance using as little ... -
Control-relevant nonlinearity measure and integrated multi-model control
Du, Jingjing; Johansen, Tor Arne (Journal article; Peer reviewed, 2017)A control-relevant nonlinearity measure (CRNM) method is proposed based on the gap metric and the gap metric stability margin to measure the nonlinear degree of a system once a linear control strategy is selected. Supported ... -
Cooperative circumnavigation for a mobile target using adaptive estimation
Fonseca, J F G; Wei, J; Johansen, Tor Arne; Johansson, Karl Henrik (Chapter, 2020)In this paper we consider the problem of tracking a mobile target using adaptive estimation while circumnavigating it with a system of Unmanned Surface Vehicles (USVs). The mobile target considered is an irregular dynamic ... -
Cooperative Control for Multirotors Transporting an Unknown Suspended Load under Environmental Disturbances
Klausen, Kristian; Meissen, Chris; Fossen, Thor I.; Arcak, Murat; Johansen, Tor Arne (Journal article; Peer reviewed, 2019)In this paper, we develop a cooperative control algorithm for a group of multirotor unmanned aerial vehicles (UAVs) transporting a suspended payload of unknown mass. In addition, the vehicles are subjected to unknown ... -
Cooperative path following of constrained autonomous vehicles with model predictive control and event-triggered communications
Hung, Nguyen T; Pascoal, António M.; Johansen, Tor Arne (Peer reviewed; Journal article, 2020)We present a solution to the problem of multiple vehicle cooperative path following (CPF) that takes explicitly into account vehicle input constraints, the topology of the intervehicle communication network, and time‐varying ... -
Cooperative Remote Sensing of Ice using a Spatially Indexed Labeled Multi-Bernoulli Filter
Olofsson, Jonatan; Brekke, Edmund Førland; Johansen, Tor Arne (Chapter, 2017)In polar region operations, drift ice positioning and tracking is useful for both scientific and safety reasons. Many sensors can be employed to generate detections of sea ice, such as satellite-carried Synthetic Aperture ... -
Cooperative Rendezvous and Docking for Underwater Robots Using Model Predictive Control and Dual Decomposition
Nielsen, Mikkel Cornelius; Johansen, Tor Arne; Blanke, Mogens (Chapter, 2018)This paper considers the problem of rendezvous and docking with visual constraints in the context of underwater robots with camera-based navigation. The objective is the convergence of the vehicles to a common point while ... -
Coordinated maritime missions of unmanned vehicles - network architecture and performance analysis
Zolich, Artur Piotr; Johansen, Tor Arne; Sægrov, Atle; Vågsholm, Erlend; Hovstein, Vegard Evjen (Journal article; Peer reviewed, 2017)Multi-vehicle operations using various types of unmanned vehicles (UVs) can increase efficiency of marine data acquisition, reduce the crew risk and lower mission costs. These types of missions are very complex and often ...