Blar i NTNU Open på forfatter "Stakvik, Jon Åge"
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Control Design for Backstepping and Adaptive Backstepping Controllers in MPD
Johansen, Martin Bergene (Master thesis, 2017)In the field of oil drilling there is a concept known as Managed Pressure Drilling. In Managed Pressure Drilling one relies on pumps in combination with chokes (valves) in order to maintain a certain pressure at the bottom ... -
Identification, Inversion and Implementaion of the Preisach Hysteresis Model in Nanopositioning
Stakvik, Jon Åge (Master thesis, 2014)Atomic force microscopes offer the possibility for imaging a sample topography with accuracy in the nanometer scale. This kind of performance is impossible without actuators enabling a certain accuracy. A frequently used ... -
On implementation of the Preisach model identification and inversion for hysteresis compensation
Stakvik, Jon Åge; Ragazzon, Michael Remo Palmén; Eielsen, Arnfinn Aas; Gravdahl, Jan Tommy (Peer reviewed; Journal article, 2015)A challenge for precise positioning in nanopositioning using smart materials is hysteresis, limiting posi-tioning accuracy. The Preisach model, based on the delayed relay operator for hysteresis modelling, isintroduced. ... -
Pressure wave propagation in Managed Pressure Drilling- model comparison with real life data
Berg, Christian; Stakvik, Jon Åge; Lie, Bernt; Vågsæther, Knut; Kaasa, Glenn-Ole (Journal article; Peer reviewed, 2019)Drilling for oil and gas is a complex process, involving pumping of fluid through kilometers of pipes. Even though the drilling fluid has a high speed of sound (˜1000 m/s), the large lengths involved make pressure wave ...