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    • Object Detection and Tracking With UAVs: A Framework for UAV Object Detection and Tracking Using a Thermal Imaging Camera 

      Leira, Frederik Stendahl (Doctoral theses at NTNU;2017:1, Doctoral thesis, 2017)
      In recent years there has been a drastic increase in the commercial availability of small UAVs for civil and commercial applications. These applications includes, but are not limited to, inspections of structures, search ...

    • Object Detection in Maritime Environments 

      Grini, Simen Viken (Master thesis, 2019)
      Maskinlæringsmetoder basert pa konvolusjonelle nevrale nettverk (CNNs) har i senere år tatt over som den dominerende teknikken innenfor objektdeteksjon. Store forskningsressurser blir brukt på å utvikle dette feltet videre, ...

    • Object Detection in Point Clouds for Augmented Reality 

      Mysen, Mats Meier (Master thesis, 2019)
      Denne rapporten dekker arbeid på et 3D object detection rammeverk basert på Vote3Deep arkitekturen. Nevrale nettverk basert på dette rammeverket er trent opp til å detektere objekter i genererte punktskyer. Dette gjøres ...

    • Object Detection, Recognition and Tracking from UAVs using a Thermal Camera 

      Leira, Frederik Stendahl; Helgesen, Håkon Hagen; Johansen, Tor Arne; Fossen, Thor I. (Peer reviewed; Journal article, 2020)
      In this paper a multiple object detection, recognition, and tracking system for unmanned aerial vehicles (UAVs) has been studied. The system can be implemented on any UAVs platform, with the main requirement being that the ...

    • Object Tracking for Fine-Tuning of Robot Positions 

      Brekke, Tore (Master thesis, 2009)
      In many complex applications an accurate model of the plant is not known. Consequently, complementary methods are needed to automatically achieve accurate dynamical positioning of a robot in relation to its surroundings. ...

    • Observer and IMU-based Detection of Faults in Position Reference Systems and Gyrocompasses with Dual Redundancy in Dynamic Positioning 

      Rogne, Robert Harald; Johansen, Tor Arne; Fossen, Thor I. (Journal article; Peer reviewed, 2014)
      Faults in position reference systems and vessel sensors pose a serious hazard during dynamic positioning, and vessel drive-offs because of erroneous data may have dire consequences. The classification society standards ...

    • Observer Backstepping Control for Variable Speed Wind Turbine 

      Galeazzi, Roberto; Gryning, Mikkel; Blanke, Mogens (Chapter; Peer reviewed, 2013)
      This paper presents an observer backstepping controller as feasible solution to variable speed control of wind turbines to maximize wind power capture when operating between cut-in and rated wind speeds. The wind turbine ...

    • Observer based path following for underactuated marine vessels in the presence of ocean currents: A global approach 

      Belleter, Dennis Johannes Wouter; Maghenem, Mohamed; Paliotta, Claudio; Pettersen, Kristin (Journal article; Peer reviewed, 2019)
      In this paper a solution to the problem of following a curved path in the presence of a constant unknown ocean current disturbance is presented. We introduce a path variable that represents the curvilinear abscissa on the ...

    • Observer Based Path Following for Underactuated Marine Vessels in the Presence of Ocean Currents: A Local Approach 

      Maghenem, Mohamed; Belleter, Dennis Johannes Wouter; Paliotta, Claudio; Pettersen, Kristin Ytterstad (Journal article; Peer reviewed, 2017)
      In this article a solution to the problem of following a curved path in the presence of a constant unknown ocean current disturbance is presented. The path is parametrised by a path variable that is used to propagate a ...

    • Observer Based Sliding Mode Attitude Control: Theoretical and Experimental Results 

      Jørgensen, Ulrik; Gravdahl, Jan Tommy (Journal article; Peer reviewed, 2011)
      In this paper we present the design of a sliding mode controller for attitude control of spacecraft actuated by three orthogonal reaction wheels. The equilibrium of the closed loop system is proved to be asymptotically ...

    • Observer Design for a Class of Semilinear Hyperbolic PDEs with Distributed Sensing and Parametric Uncertainties 

      Holta, Haavard H. F.; Aamo, Ole Morten (Peer reviewed; Journal article, 2022)
      We study a class of heterodirectional semilinear hyperbolic partial differential equations, where the distributed state vector is partially measured. An observer estimating the unmeasured part of the state vector is designed. ...

    • Observer Design For Fault-Tolerant Dynamic Positioning Using MEMS Inertial Sensors 

      Rogne, Robert Harald (Doctoral theses at NTNU;2017:86, Doctoral thesis, 2017)
      The contribution of this disseration is threefold. First, it provides insight into the use of a certain type of nonlinear observers (NLO) for platform independent position, velocity and attitude estimation, exemplified by ...

    • Observer Design for Mechanical Systems described by Semilinear Partial Differential Equations 

      Nguyen, Tu Duc (Doktoravhandlinger ved NTNU, 1503-8181; 2004:86, Doctoral thesis, 2004)
      This doctoral thesis presents new analysis tool for observer design of flexible mechanical systems described by partial differential equations (PDEs). This work focuses especially on designing of natural observers. ...

    • Observer design for underwater vehicles with position and angle measurement 

      Refsnes, Jon E Gorset; Pettersen, Kristin Ytterstad; Sørensen, Asgeir Johan (Journal article, 2006)
      In this paper we propose a new observer system for underwater vehicles. The main design objective behind this strategy is to reduce the destabilizing effect of the Coriolis and centripetal forces and moments in the observer. ...

    • Obstacle Detection and Avoidance in a 3D Environment 

      Lindefjeld, Magnus Flaten (Master thesis, 2022)
      Målet med denne masteroppgaven var å utvikle en metode for deteksjon og kollisjonsunngåelse av hindringer som f.eks. lave åpninger, hull eller små gjenstander på gulvet. En robot basert på nRF52840 DK ble nylig ferdigstilt, ...

    • Obstacle detection and avoidance system for USV FishOtter 

      Dragesund, Herman Kulild (Master thesis, 2022)
      Denne avhandlingen har som målsetning å utvikle og implementere en algoritme for kollisjonsunngåelse for et lite ubemannet marint fartøy (USV). Fartøyet brukes i et prosjekt ved Norges Teknisk-Naturvitenskapelige Universitet ...

    • Obstructive sleep apnea detection using discrete wavelet transform-based statistical features 

      Rajesh, Kandala.N.V.P.S.; Dhuli, Ravindra; Setti, Sunilkumar Telagam (Peer reviewed; Journal article, 2021)
      Motivation and objective Obstructive sleep apnea (OSA) is a sleep disorder identified in nearly 10% of middle-aged people, which deteriorates the normal functioning of human organs, notably that of the heart. Furthermore, ...

    • Ocean Surface Pickup with Multirotor Drone 

      Eskedal, Marius (Master thesis, 2020)
      Autonome droner er i økende grad brukt til å utføre oppdrag som er vanskelig for mennesker å utføre selv. Droner tilbyr høy sikkerhet og effektivitet, men nøyaktighet i landingsfasen er en vanskelig utfordring. Denne ...

    • Off-Shore Robotics: Robust and Optimal Solutions for Autonomous Operation 

      From, Pål Johan (Doktoravhandlinger ved NTNU, 1503-8181; 2010:96, Doctoral thesis, 2010)
      The vast majority of research in the field of robotics has over the last few decades shifted from industrial robots—in the sense of robots mounted in a structured environment such as a factory floor—to robots operating in ...

    • Offshore Pipelaying Dynamics 

      Jensen, Gullik Anthon (Doktoravhandlinger ved NTNU, 1503-8181; 2010:28, Doctoral thesis, 2010)
      This thesis considers three issues regarding modeling of oshore pipelaying dynamics. These are: (i) the formulation of an oshore pipeline installation operation as a control problem, (ii) the development and passivity ...