Blar i NTNU Open på forfatter "Johansen, Tor Arne"
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Cartesian thrust allocation algorithm with variable direction thrusters, turn rate limits and singularity avoidance
Veksler, Aleksander Vladimirovitsj; Johansen, Tor Arne; Borrelli, Francesco; Realfsen, Bjørnar (Proceedings of the IEEE Conference on Control Applications;2014, Journal article, 2014)The literature on thrust allocation algorithms that is currently available usually focuses on solving only a few of the many facets of the thrust allocation problem at a time. This paper presents a unified thrust allocation ... -
Cascade Attitude Observer for the SLAM filtering problem
Bjørne, Elias; Johansen, Tor Arne; Brekke, Edmund Førland (Journal article; Peer reviewed, 2017)This article presents an attitude observer that exploits both bearing and range measurements from landmarks, in addition to reference vectors such as magnetometer and accelerometer. It is a gyro bias observer in cascade ... -
Characterizing Spectral Response in Thermal Environments, the HYPSO-1 Hyperspectral Imager
Prentice, Elizabeth; Henriksen, Marie Bøe; Johansen, Tor Arne; Navarro Medina, F; Gomez San Juan, A (Journal article; Peer reviewed, 2022) -
A closer look at a spectrographic wavelength calibration
Henriksen, Marie Bøe; Sigernes, Fred; Johansen, Tor Arne (Peer reviewed; Journal article, 2022)Methods to spectrally calibrate imaging spectrographs, also known as Hyperspectral Imagers (HSIs), are common and known, but few look into how well the wavelength calibration performs. When building hyperspectral instruments ... -
Clustering and Classification of hyperspectral images on the HYPSO CubeSat
Danielsen, Aksel (Master thesis, 2021)NTNU SmallSat Lab utvikler HYPSO, en kubesatellitt som skal overvåke havet ved bruk av et hyperspektralt kamera. Prosesseringen av hyperspektrale bilder ombord blir gjort serielt i en prosesseringskjede som ble utviklet ... -
Collaborative Collision Avoidance for Autonomous Ships Using Informed Scenario-Based Model Predictive Control
Akdag, Melih; Fossen, Thor I.; Johansen, Tor Arne (Peer reviewed; Journal article, 2022)There exist several collision avoidance algorithms for autonomous ships. But the majority of them do not utilize information about other ships’ intentions, except for observed position and velocity. As the attention for ... -
Collaborative collision avoidance for Maritime Autonomous Surface Ships: A review
Akdag, Melih; Solnør, Petter; Johansen, Tor Arne (Peer reviewed; Journal article, 2022)Collision avoidance algorithms for autonomous ships are frequently proposed, but very few studies consider the interaction and information exchange between ships, and if they do, this is usually limited to only between ... -
A collision avoidance algorithm with intention prediction for inland waterways ships
Tran, Hoang Anh; Johansen, Tor Arne; Negenborn, Rudy (Chapter, 2023)Collision avoidance is one of the most challenging problems in developing a Maritime Autonomous Surface Ship. This paper proposes a new collision avoidance algorithm for inland waterway ships. The algorithm addresses the ... -
A collision avoidance algorithm with intention prediction for inland waterways ships
Tran, Hoang Anh; Johansen, Tor Arne; Negenborn, Rudy (Chapter, 2023)Collision avoidance is one of the most challenging problems in developing a Maritime Autonomous Surface Ship. This paper proposes a new collision avoidance algorithm for inland waterway ships. The algorithm addresses the ... -
Collision Avoidance for ASVs Using Model Predictive Control
Hagen, Inger Berge (Master thesis, 2017)If an Autonomous Surface Vehicle (ASV) is to be operated at sea in the proximity of other vessels it must be equipped with a Collision Avoidance System (CAS). This system must comply with the rules for avoiding collision ... -
Collision Avoidance for Multirotor Inspection
Bjelland, Vetle Andre (Master thesis, 2018)During the last couple of years, the goal of using unmanned aerial vehicles (UAV) for inspection purposes has become within reach. This thesis considers the different algorithms for implementing a high level controller for ... -
Collision avoidance of autonomous ships in inland waterways – A survey and open research problems
Tran, Hoang Anh; Johansen, Tor Arne; Negenborn, Rudy (Peer reviewed; Journal article, 2023)Promoting autonomous surface ships in inland waterways traffic (IWT) is a potential solution towards reducing road traffic and transport emission footprints. Over the last decade, there has been a growing research on ... -
Colored-Noise Tracking of Floating Objects using UAVs with Thermal Cameras
Helgesen, Håkon Hagen; Leira, Frederik Stendahl; Johansen, Tor Arne (Chapter, 2019)Tracking of floating objects using a fixed-wing UAV equipped with a thermal camera requires precise knowledge about the position and attitude of the UAV. Errors in the navigation estimates reduce the accuracy of the tracking ... -
COLREGS compliant Collision Avoidance System for a Wave and Solar Powered USV
Sæter, Sølve Dahlin (Master thesis, 2018)Autonomous ships are the future of modern maritime traffic, but in order to operate in the vicinity of other vessels, Autonomous Surface Vehicles (ASV) must be equipped with a collision avoidance system (CAS). This system ... -
Combinatorial approach toward multiparametric quadratic programming based on characterizing adjacent critical regions
Ahmadi Moshkenani, Parisa; Johansen, Tor Arne; Olaru, Sorin (Journal article; Peer reviewed, 2018)Several optimization-based control design techniques can be cast in the form of parametric optimization problems. The multiparametric quadratic programming (mpQP) represents a popular class often related to the control of ... -
Combining Methods of Mathematical Optimization and Artificial Intelligence for Autonomous UAV Mission Planning and Execution
Åsgård, Henning Andre (Master thesis, 2017)In this thesis, different solutions for autonomous mission planning and execution aimed at Unmanned Aerial Vehicles (UAV) is investigated using methods of Artificial Intelligence (AI) and Mathematical Optimization. Different ... -
Combining model-free and model-based angle of attack estimation for small fixed-wing UAVs using a standard sensor suite
Wenz, Andreas Wolfgang; Cristofaro, Andrea; Johansen, Tor Arne (Chapter, 2016)We propose to estimate steady and turbulent wind velocities and aerodynamic coefficients of a fixed-wing Unmanned Aerial Vehicle (UAV) by using frequency separation as well as kinematic, aerodynamic and wind models combined ... -
Comparing Filters for Correction of Second Order Diffraction Effects in Hyperspectral Imagers
Henriksen, Marie Bøe; Sigernes, Fred; Johansen, Tor Arne (Journal article; Peer reviewed, 2023)Second order diffraction effects often occur in hyperspectral instruments with dispersive elements. These second (and higher) order diffractions are typically unwanted, and should therefore be removed. One way of achieving ... -
Comparing pre- and post-launch images from the HYPSO-1 cubesat hyperspectral imager
Henriksen, Marie Bøe; Garrett, Joseph; Johansen, Tor Arne; Sigernes, Fred (Journal article, 2022)HYPSO-1, a 6U cubesat carrying a hyperspectral imaging payload for ocean color observation, was launched in January 2022. During the commissioning and validation phases, the satellite and payload performance were tested. ... -
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 ...