• Development of a Life-cycle Cost Framework for Retrofitting Marine Engines towards Emission Reduction in Shipping 

      Bui, Khanh Quang; Perera, Lokukaluge Prasad; Emblemsvåg, Jan (Peer reviewed; Journal article, 2021)
      The shipping industry is striving to reduce its negative environmental footprint and become more energy-efficient. In order to achieve this, undergoing the transition towards innovative engine and propulsion systems is ...
    • Digital Transformation of Care in Lifetime Neighbourhoods 

      Rogelj, Valerija; Temeljotov Salaj, Alenka; Bogataj, David (Peer reviewed; Journal article, 2022)
      Abstract: If we want to achieve an effective digital transformation of neighborhoods, we need to understand the interaction between social determinants of health and emerging ambient technologies. Older adults suffer from ...
    • Digital transformation of community health and social services for ageing cohorts 

      Rogelj, Valerija; Temeljotov Salaj, Alenka; Bogataj, David (Peer reviewed; Journal article, 2021)
      Municipalities in the European Union are ageing fast. However, achieving societal and environmental change with a focus on the development of an age-friendly environment, ambient assisted living, eHealth, public spaces ...
    • Dither signals optimization in constrained multi-agent extremum seeking control 

      Silva, Thiago Lima; Pavlov, Alexey (Peer reviewed; Journal article, 2021)
      In this paper we consider the problem of optimization of a multi-agent system with constraints through perturbations-based extremum seeking control. We demonstrate that for such systems, effects of dither signals applied ...
    • Dynamic Bayesian Networks for Reduced Uncertainty in Underwater Operations 

      Skaldebø, Martin Breivik; Schjølberg, Ingrid (Peer reviewed; Journal article, 2022)
      This paper presents a novel framework for modelling dynamic Bayesian belief networks (BBNs) for online risk assessment in underwater operations. Existing frameworks spans from commercial software with restricted code access ...
    • Enhanced Hydroacoustic Range Robustness of Three-Stage Position Filter based on Long Baseline Measurements with Unknown Wave Speed 

      Jørgensen, Erlend Kvinge; Johansen, Tor Arne; Schjølberg, Ingrid (Journal article; Peer reviewed, 2016)
      This paper considers the problem of constructing a globally convergent position-and velocity estimator with close-to-optimal noise properties using hydroacoustic long baseline measurements. Three ways of improving the range ...
    • Exploring the challenges with applying tracking and tracing technology in the dairy industry 

      Høyer, Madeleine Ruiz; Oluyisola, Olumide Emmanuel; Strandhagen, Jan Ola; Semini, Marco (Journal article; Peer reviewed, 2019)
      The purpose of this research is to identify the various challenges encountered when using tracking and tracing technology in the dairy industry. Based on a systematic literature review, the challenges are reviewed from the ...
    • Force actuated real-tme hybrid model testing of a moored vessel: A case study investigating force errors 

      Ueland, Einar Skiftestad; Skjetne, Roger; Vilsen, Stefan Arenfeldt (Journal article; Peer reviewed, 2018)
      This paper presents a study where real-time hybrid testing is used to emulate a moored barge. The barge is modelled physically while the mooring forces are simulated numerically and actuated onto the physical substructure. ...
    • Grocery retail supply chain planning and control: Impact of consumer trends and enabling technologies 

      Vallandingham, Logan Reed; Yu, Quan; Sharma, Nakul; Strandhagen, Jo Wessel; Strandhagen, Jan Ola (Journal article; Peer reviewed, 2018)
      Grocery retail supply chains have in the past decades increased their efficiency which has led to cost-focused supply chains that are able to deliver high volumes of products at low prices. There is still continual pressure ...
    • Hybrid Collision Avoidance with Moving Obstacles 

      Chai, Yi; Hassani, Vahid (Journal article; Peer reviewed, 2019)
      This paper proposes a hybrid collision avoidance (COLAV) approach based on the integration of a global path planning algorithm and a reactive collision avoidance technique. This combination provides a robust path planning ...
    • Hybrid marine power plants model validation with strategic loading 

      Rejani Miyazaki, Michel; Sørensen, Asgeir Johan; Vartdal, Bjørn J (Journal article, 2016)
      Recent advances in Energy Storage Devices (ESD) technology has enabled new supervisory control strategies for power generation and distribution on hybrid marine power plants, supported by new class society regulations. A ...
    • Hybrid Observer Combining Measurements of Different Fidelities 

      Brodtkorb, Astrid H.; Teel, Andrew R.; Sørensen, Asgeir Johan (Journal article; Peer reviewed, 2016)
      A signal-based hybrid observer combining measurements of different fidelities is proposed for position and velocity estimation of marine vessels. The concept assumes that noisy position measurements are available only ...
    • Hybrid observer for improved transient performance of a marine vessel in dynamic positioning 

      Brodtkorb, Astrid H.; Værnø, Svenn Are Tutturen; Teel, Andrew R.; Sørensen, Asgeir Johan; Skjetne, Roger (Journal article; Peer reviewed, 2016)
      Dynamic positioning (DP) systems are used on marine vessels for automatic station keeping and tracking operations solely by use of thrusters. Observers are key components of DP systems, and two main types are proposed in ...
    • Hybrid Tracking Controller for an ASV Providing Mission Support for an AUV 

      Fyrvik, Torbjørn Reitan; Bremnes, Jens Einar; Sørensen, Asgeir Johan (Peer reviewed; Journal article, 2022)
      Autonomous underwater vehicles (AUVs) rely on surface support for communication with operators and position fixes to bound inertial navigation errors. By installing an acoustic modem on an autonomous surface vehicle (ASV), ...
    • Icing diagnosis in unmanned aerial vehicles using an LPV multiple model estimator 

      Rotondo, Damiano; Cristofaro, Andrea; Hassani, Vahid; Johansen, Tor Arne (Journal article; Peer reviewed, 2017)
      The phenomenon of icing, i.e. ice accretion on aircraft surfaces, affects the flight performance of unmanned aerial vehicles (UAVs). Autonomous icing detection schemes are needed in order to assure high efficiency and limit ...
    • Integration of risk in hierarchical path planning of underwater vehicles 

      Lefebvre, Nicolas; Schjølberg, Ingrid; Utne, Ingrid Bouwer (Journal article; Peer reviewed, 2016)
      This paper focuses on path planning problems integrating the risk of collision. This challenge is crucial regarding the use of autonomous underwater vehicles (AUVs) for inspection, maintenance and repair operations. The ...
    • Kit preparation with cobot-supported sorting in mixed model assembly 

      Sgarbossa, Fabio; Calzavara, Martina; Fager, Patrik (Journal article; Peer reviewed, 2019)
      Kitting is a common approach of materials supply with mixed-model assembly, by which components are supplied to the assembly process in pre-sorted kits. With kitting, the kit preparation is a labour intensive process and ...
    • Managing engineering changes in the engineer-to-order environment: challenges and research needs 

      Iakymenko, Natalia; Romsdal, Anita; Semini, Marco; Strandhagen, Jan Ola (Journal article; Peer reviewed, 2018)
      Engineering changes (ECs) in companies in the engineer-to-order (ETO) production environment are practically unavoidable. It is important for ETO companies to accommodate ECs throughout the project duration, effectively ...
    • Maneuvering with safety guarantees using control barrier functions 

      Marley, Mathias; Skjetne, Roger; Basso, Erlend Andreas; Teel, Andrew R. (Journal article; Peer reviewed, 2021)
      Control barrier functions (CBFs) ensure safety of controlled dynamical systems, by restricting the control inputs to render desired sets forward invariant. In this paper we propose a dynamic guidance scheme for autonomous ...
    • Material Distribution and Transportation in a Norwegian Hospital: A Case Study 

      Fragapane, Giuseppe; Bertnum, Aili Biriita; Hvolby, Hans-Henrik; Strandhagen, Jan Ola (Journal article; Peer reviewed, 2018)
      Automated Guided Vehicles have shown significant importance in material transportation and distribution in today’s hospitals. The increasing trends of shorter hospital stays and increase of treatments and surgeries in ...