Now showing items 1-20 of 161

    • 3D AUV Collision Avoidance 

      Engelhardtsen, Øystein (Master thesis, 2007)
      An underlying requirement for any Autonomous Underwater Vehicle (AUV) is to navigate through unknown or partly unknown environments while performing certain user specified tasks. The loss of an AUV due to collision is ...
    • 3D Coordinated Path Following with Disturbance Rejection for Formations of Under-actuated Agents 

      Belleter, Dennis Johannes Wouter; Pettersen, Kristin Ytterstad (Proceedings of the IEEE Conference on Decision & Control, including the Symposium on Adaptive Processes 2015;CDC 2015, Conference object; Journal article; Peer reviewed, 2015)
      In this paper coordinated path following for formations of under-actuated agents in three dimensional space is considered. The agents are controlled to follow a straight-line path whilst being affected by an unknown ...
    • A 3D motion planning framework for snake robots 

      Liljebäck, Pål; Pettersen, Kristin Ytterstad; Stavdahl, Øyvind; Gravdahl, Jan Tommy (Chapter, 2014)
      This paper presents a motion planning framework for three-dimensional body shape control of snake robots. Whereas conventional motion planning approaches define the body shape of snake robots in terms of their individual ...
    • A 3D Reactive Collision Avoidance Algorithm for Nonholonomic Vehicles 

      Syre Wiig, Martin; Pettersen, Kristin Ytterstad; Krogstad, Thomas Røbekk (Chapter, 2018)
      This paper presents a 3D reactive collision avoidance algorithm for vehicles with nonholonomic constraints. The algorithm steers the heading and pitch angle of the vehicle in order to maintain a constant avoidance angle ...
    • A 3D Reactive Collision Avoidance Algorithm for Underactuated Vehicles 

      Syre Wiig, Martin; Pettersen, Kristin Ytterstad; Krogstad, Thomas Røbekk (Chapter, 2018)
      This paper presents a 3D reactive collision avoidance algorithm for vehicles with underactuated dynamics. The underactuated states cannot be directly controlled, but are controlled indirectly by steering the direction of ...
    • A Benchmarking Framework for Control Methods of Maritime Cranes Based on the Functional Mockup Interface 

      Sanfilippo, Filippo; Hatledal, Lars Ivar; Pettersen, Kristin Ytterstad; Zhang, Houxiang (Journal article, 2017)
      A benchmark framework for advanced control methods of maritime cranes is presented based on the use of the functional mockup interface. The system integrates different manipulator models, all the corresponding hydraulic ...
    • A control framework for biologically inspired underwater swimming manipulators equipped with thrusters 

      Sverdrup-Thygeson, Jørgen; Kelasidi, Eleni; Pettersen, Kristin Ytterstad; Gravdahl, Jan Tommy (IFAC Proceedings series;, Journal article; Peer reviewed, 2016)
      In this paper we present a control framework for a novel biologically inspired underwater swimming manipulator (USM) equipped with thrusters. The framework consists of a kinematic part and a dynamic part. The kinematic ...
    • A control framework for snake robot locomotion based on shape control points interconnected by Bézier curves 

      Liljeback, Pål; Pettersen, Kristin Ytterstad; Stavdahl, Øyvind; Gravdahl, Jan Tommy (Journal article; Peer reviewed, 2012)
      This paper presents a control framework for shape control of snake robots for the purpose of locomotion. An advantage of the framework is that it allows the macroscopic shape of a snake robot to be controlled explicitly ...
    • A Control–Oriented Model of Underwater Snake Robots 

      Kelasidi, Eleni; Pettersen, Kristin Ytterstad; Gravdahl, Jan Tommy (Conference Publications;ROBIO 2014, Conference object; Journal article; Peer reviewed, 2014)
      In this paper we consider swimming underwater snake robots that are fully immersed in water and moving in a virtual horizontal plane. The main objective of the paper is to develop a model that is well suited for control ...
    • A control-oriented model of underwater snake robots exposed to currents 

      Kohl, Anna M.; Kelasidi, Eleni; Pettersen, Kristin Ytterstad; Gravdahl, Jan Tommy (Conference object; Journal article; Peer reviewed, 2015)
      This paper presents a control-oriented model of a neutrally buoyant underwater snake robot that is exposed to a constant irrotational current. The robot is assumed to move in a horizontal, fully submerged plane with a ...
    • Active camera control with obstacle avoidance for remote operations with industrial manipulators: Implementation and experimental results 

      Bjerkeng, Magnus; Transeth, Aksel Andreas; Pettersen, Kristin Ytterstad; Kyrkjebø, Erik; Fjerdingen, Sigrud Aksnes (Conference object, 2011)
      Remote controlled robots on offshore oil and gas platforms can potentially reduce costs and improve environment, health and safety issues. A key to successful remote control is to provide onshore operators with a sufficient ...
    • Adaptive feed-forward hysteresis compensation for piezoelectric actuators 

      Eielsen, Arnfinn Aas; Gravdahl, Jan Tommy; Pettersen, Kristin Ytterstad (Journal article; Peer reviewed, 2012)
      Piezoelectric actuators are often employed for high-resolution positioning tasks. Hysteresis and creep nonlinearities inherent in such actuators deteriorate positioning accuracy. An online adaptive nonlinear hysteresis ...
    • A hybrid approach to underwater docking of AUVs with cross-current 

      Henriksen, Vegard F; Brekke, Edmund Førland; Pettersen, Kristin Ytterstad; Sans-Muntadas, Albert (Conference object; Journal article; Peer reviewed, 2016)
      This paper proposes a docking maneuver for an underactuated autonomous underwater vehicle (AUV) to dock into a funnel shaped docking station. The novelty of the proposed approach is enabling an underactuated AUV that is ...
    • A hybrid model of obstacle-aided snake robot locomotion 

      Liljeback, Pål; Pettersen, Kristin Ytterstad; Stavdahl, Øyvind; Gravdahl, Jan Tommy (Conference object, 2010)
      A snake can traverse cluttered and irregular environments by using irregularities around its body as push-points to aid the propulsion. This characteristic feature of biological snake locomotion, denoted obstacle-aided ...
    • A Modified Dynamic Window Algorithm for Horizontal Collision Avoidance for AUVs 

      Eriksen, Bjørn-Olav Holtung; Breivik, Morten; Pettersen, Kristin Ytterstad; Syre Wiig, Martin (Chapter; Peer reviewed, 2016)
      Much research has been done on the subject of collision avoidance (COLAV). However, few results are presented that consider vehicles with second-order nonholonomic constraints, such as autonomous underwater vehicles (AUVs). ...
    • A modular and waterproof snake robot joint mechanism with a novel force/torque sensor 

      Liljebäck, Pål; Stavdahl, Øyvind; Pettersen, Kristin Ytterstad; Gravdahl, Jan Tommy (IEEE International Conference on Intelligent Robots and Systems. Proceedings;2012, Conference object, 2012)
      This paper presents the design of a waterproof and mechanically robust joint module for the snake robot Mamba. The main contribution of the module is a custom-designed force/torque sensor based on strain gauges, which ...
    • Analysis of underwater snake robot locomotion based on a control-oriented model 

      Kohl, Anna M.; Pettersen, Kristin Ytterstad; Kelasidi, Eleni; Gravdahl, Jan Tommy (Proceedings of the 2015 IEEE Conference on Robotics and Biomimetics;, Journal article; Conference object; Peer reviewed, 2015)
      This paper presents an analysis of planar underwater snake robot locomotion in the presence of ocean currents. The robot is assumed to be neutrally buoyant and move fully submerged with a planar sinusoidal gait and limited ...
    • An Experimental Investigation of Path Following for an Underwater Snake Robot with a Caudal Fin 

      Kelasidi, Eleni; Pettersen, Kristin Ytterstad; Kohl, Anna M; Gravdahl, Jan Tommy (Journal article; Peer reviewed, 2017)
      In this paper, we present a bioinspired underwater snake robot (USR) equipped with a passive caudal (tail) fin. In particular, a highly flexible configuration of a USR is presented, which is capable of locomotion both on ...
    • An Integral Line-of-Sight Guidance Law with a Speed-dependent Lookahead Distance 

      Syre Wiig, Martin; Pettersen, Kristin Ytterstad; Ruud, Else-Line Malene; Krogstad, Thomas Røbekk (Chapter, 2018)
      This paper presents an algorithm that makes an underactuated marine vehicle follow a straight line path while in the presence of a constant ocean current. When following the path, the vehicle maintains a desired surge speed ...
    • A Reactive Collision Avoidance Algorithm for Nonholonomic Vehicles 

      Syre Wiig, Martin; Pettersen, Kristin Ytterstad; Savkin, Andrey (Journal article; Peer reviewed, 2017)
      This paper presents a reactive collision avoidance algorithm for vehicles with unicycle-type nonholonomic constraints. Static and dynamic obstacles are avoided by keeping a constant avoidance angle to the obstacle. The ...