Browsing NTNU Open by Author "Jørgensen, Ulrik"
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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 ... -
Online reconstruction of drifting underwater ice topography: The 2D case
Jørgensen, Ulrik; Skjetne, Roger (Journal article; Peer reviewed, 2015)An online estimation design for a drifting two dimensional ice topography is presented. Under the assumption that the topography can be accurately represented by a truncated Fourier series, and given a moving window of ... -
Synchronization and Control of Attitude for Spacecrafts:: Design, Analysis and Experiments
Jørgensen, Ulrik (Master thesis, 2010)The topic of this paper is to control and synchronize sphere-shaped spacecrafts in a leader-follower synchronization scheme. In order to achieve this objective, a nonlinear mathematical model of the vehicles has been ...