Now showing items 1752-1771 of 3697

    • Inertial Navigation — Theory and Applications 

      Gade, Kenneth (Doctoral theses at NTNU;2018:38, Doctoral thesis, 2018)
      Navigation is defined as the process of estimating the six degrees of freedom. We have seen an increased demand for navigation the last decade, and important reasons for the growth are the increased availability of low ...
    • Inertial Sensors for Risk-Based Redundancy in Dynamic Positioning 

      Bryne, Torleiv Håland; Rogne, Robert Harald; Fossen, Thor I.; Johansen, Tor Arne (Chapter, 2017)
      In this paper we present an alternative configuration of sensors, position and heading reference systems for dynamically positioned (DP) vessels. The approach uses a sensor structure based on low-cost inertial measurements ...
    • Infinite-Dimensional Observer for Process Monitoring in Managed Pressure Drilling 

      Hasan, Agus Ismail (Journal article; Peer reviewed, 2015)
      Utilizing flow rate and pressure data in and out of the mud circulation loop provides a driller with real-time trends for the early detection of well-control problems that impact the drilling efficiency. This paper presents ...
    • Inflight Estimation of Airflow Variables, Wind Velocities and Aerodynamic Coefficients for Unmanned Aerial Vehicles 

      Wenz, Andreas Wolfgang (Doctoral theses at NTNU;2018:349, Doctoral thesis, 2018)
      This thesis focuses on the estimation of wind velocities, angle of attack and aerodynamic coefficients for small unmanned aerial vehicles (UAVs) and in addition, the use of these estimates for two different applications. ...
    • Influence of Viscosity and Non-Linearities in Predicting Motions of a Wind Energy Offshore Platform in Regular Waves 

      Ferrandis, José del Águila; Bonfiglio, Luca; Rodríguez, Ricardo Zamora; Chryssostomidis, Chryssostomos; Faltinsen, Odd Magnus; Triantafyllou, Michael (Peer reviewed; Journal article, 2018)
      Motion prediction of floating bodies in waves represents one of the most challenging problems in naval hydrodynamics. The solution of the seakeeping problem involves the study of complex non-linear wave-body interactions ...
    • Influence of Weight-on-Bit on Percussive Drilling Performance 

      Song, Xianfeng; Aamo, Ole Morten; Kane, Pascal-Alexandre; Detournay, Emmanuel (Peer reviewed; Journal article, 2020)
      A phenomenological model for percussive drilling systems is proposed in this paper to explain the experimentally demonstrated existence of an optimal weight-on-bit (WOB), for which the rate of penetration (ROP) is maximized. ...
    • Information model for functional safety 

      Hauge, Stein; Lundteigen, Mary Ann; Ottermo, Maria Vatshaug; Lee, Shenae; Petersen, Stig (Research report, 2023)
      A main objective of this report has been to contribute toward further digitalisation and standardisation of the petroleum industry. In particular, the report explores: • How ideas from Industry 4.0 and the AAS (asset ...
    • Information-driven robotic sampling in the coastal ocean 

      Fossum, Trygve Olav; Eidsvik, Jo; Ellingsen, Ingrid H.; Alver, Morten; Fragoso, Glaucia Moreira; Johnsen, Geir; mendes, renato; Ludvigsen, Martin; Rajan, Kanna (Journal article; Peer reviewed, 2018)
      Efficient sampling of coastal ocean processes, especially mechanisms such as upwelling and internal waves and their influence on primary production, is critical for understanding our changing oceans. Coupling robotic ...
    • Infrared Object Detection & Tracking in UAVs 

      Leira, Frederik Stendahl (Master thesis, 2013)
      The present thesis describes the design and implementation of a small, light weight and power efficient payload system for the use in unmanned aerial vehicles (UAVs). The primary application of the payload system is that ...
    • Infrastructure for Collecting and Analysing near Real-Time Data from Several Water Meters Using Wireless M-Bus 

      Skjæveland, Christofer Gilje (Master thesis, 2021)
      Bruken av smarte vannmålere blir mer populært, og flere norske kommuner, inkludert Trondheim, ønker at det tas i bruk for alle husstander. Wireless Meter-Bus (wM-Bus) har vist seg å være en populær standard i denne prosessen ...
    • Inhibits and Overrides: Applications Seen in a Safety Perspective 

      Johansen, Anders Freddy (Master thesis, 2011)
      The main purpose of this thesis has been to identify the general usage of the applications textit{inhibit} and textit{override} for a collection of installations operated by Statoil ASA. The applications are provided by a ...
    • Inner Loop Adaptive Control of Fixed-Wing Unmanned Aerial Vehicles in Icing Conditions 

      Högnadóttir, Sif (Master thesis, 2022)
      Motivert av økende bruk av små ubemannede luftfartøy utforsker denne oppgaven bruken av MRAC (model reference adaptive control), en type adaptiv regulator, og sammenligner det mot konvensjonelle PID-regulatorer. Begge ...
    • Innovation in Underwater Robots: Biologically Inspired Swimming Snake Robots 

      Kelasidi, Eleni; Liljebäck, Pål; Pettersen, Kristin Ytterstad; Gravdahl, Jan Tommy (Journal article; Peer reviewed, 2016)
      Increasing efficiency by improving locomotion methods is a key issue for underwater robots. Moreover, a number of different control design challenges must be solved to realize operational swimming robots for underwater ...
    • An Input-Voltage-Sharing Control Strategy of Input-Series Output-Parallel Isolated Bidirectional DC/DC Converter for DC Distribution Network 

      Wang, Yu; Guan, Yuanpeng; Fosso, Olav B; Molinas Cabrera, Maria Marta; Chen, Si-Zhe; Zhang, Yun (Peer reviewed; Journal article, 2021)
      Input-series-output-parallel (ISOP) isolated bidirectional direct current (dc)/dc converter (IBdc) becomes a preferred scheme connecting high-voltage and low-voltage bus in dc distribution network. Input-voltage-sharing ...
    • Instability Mode Recognition of Grid-Tied Voltage Source Converters with Nonstationary Signal Analysis 

      Zhang, Yu; Føyen, Sjur; Zhang, Chen; Molinas Cabrera, Maria Marta; Fosso, Olav B; Cai, Xu (Chapter, 2022)
      With the increasing penetration of voltage-source-converter (VSC) -interfaced distributed generations (DGs) in power systems, oscillation issues have been widely concerned whereas the root cause and nature of the oscillation ...
    • Instance Segmentation and Pose Estimation of Assembly Parts Using Deep Learning and Synthetic Data Generation 

      Opheim, Torbjørn; Lecerof, Jonas (Master thesis, 2019)
      Ved å bestemme nøyaktig translasjon og rotasjon av objekter, kan mer sofistikerte hjelpesystemer og roboter utmerke seg i en rekke scenarier og næringer. På fabrikkene i Volvo, foregår det kontinuerlig forskning som ser ...
    • Instantaneous frequency tracking of harmonic distortions for grid impedance identification based on Kalman filtering 

      Broen, Anders Kjeka; Amin, Mohammad; Skjong, Espen; Molinas Cabrera, Maria Marta (Chapter, 2016)
      This paper presents a non-invasive approach for real-time grid impedance identification based on the principle of instantaneous frequency tracking of voltage and current harmonics already present in the system, by the use ...
    • Instrumentation, actuation and software development of Bipedal Robot. 

      Panengstuen, Lars-Erik Nes; Merkesvik, Edvard Brekke; Olsen, Stian Johan; Pedersen, Kristoffer Meggelæ (Bachelor thesis, 2021)
      Tobeinte roboter kan bevege seg i røffere terreng hvor andre roboter ikke kommer til. Disse robotene er ofte avhengige av veldig kompliserte matematiske funksjoner. Det endelige målet med dette prosjektet er å lage en robot ...
    • Instrumentering av autonomt ubemannet fly: CyberSwan 

      Bjørntvedt, Edgar (Master thesis, 2007)
      Målet med CyberSwan er å lage en generell plattform for et autonomt ubemannet fly. Gjennom arbeidet som er beskrevet i denne rapporten er det kommet frem til et egnet instrumenteringsplattform for CyberSwan. Med ...
    • Instrumentering og styring av produksjonsprosess for plankton 

      Gjersdal, Jan (Master thesis, 2011)
      I denne oppgaven er det presentert instrumentering og reguleringssystem av produksjonsprosess for plankton. Systemet er utviklet og implementering med to tanker for produksjon av planktonet rotatorier. PC brukes som ...