Blar i forfatter Artikler, rapporter og annet (elektroteknologi) "Gravdahl, Jan Tommy"

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    • A Comparative Study of Different Control Structures for Flight Control with New Results 

      Oland, Espen; Kristiansen, Raymond; Gravdahl, Jan Tommy (Peer reviewed; Book; Chapter, 2018-10-24)
      This paper presents several different control structures that facilitate flight control and does a comparison between them. Specifically, this paper considers command-filtered backstepping, nonlinear dynamic inversion (NDI), and a new decoupled approach that decouples the rotational and translational dynamics by estimating the higher order derivatives of the angle of attack and sideslip angle. The ...

    • Modelling and simulation of interaction forces in tugboat-assisted docking of large marine vessels 

      Kristiansen, Raymond; Ørke, Henning; Gravdahl, Jan Tommy (Journal article; Tidsskriftartikkel; Peer reviewed, 2023-11-22)
      In this paper, we address modelling and simulation of dynamics involved in docking of large marine vessels with aid of tugboats, with the aim of providing a tool for improved design of control algorithms for autonomous docking operations. Mathematical models of the docking vessel and tugboats in 3DOF are derived, with a special focus on realistic interactions through towline, contact and friction ...