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Nonlinear Control of Fixed-Wing Unmanned Aerial Vehicles
(Doktoravhandlinger ved NTNU, 1503-8181; 2014:326, Doctoral thesis, 2014) -
Nonlinear control of Tethered Airfoils: Path-following control of Tethered Airfoils
(Master thesis, 2011)This master thesis contains modeling, analysis and control design for atethered airfoil. A path-following controller has been developed and provenlocally asymptotically stable. The guidance law is general, and applicableto ... -
Nonlinear Control with Swing Damping of a Multirotor UAV with Suspended Load
(Journal article; Peer reviewed, 2017)In this paper, we consider the problem of trajectory tracking of a multirotor Unmanned Aerial Vehicle carrying a suspended payload. The movement of the suspended payload influences the dynamics of the multirotor, which ... -
Nonlinear estimation and control in the iron ore pelletizing process: An application and analysis of the Extended Kalman Filter
(Doktoravhandlinger ved NTNU, 1503-8181; 2004:94, Doctoral thesis, 2004)This thesis deals with estimation and control of the balling drums used in the iron ore pelletizing process. First a conceptually new control scheme for balling drums is proposed. In this control scheme a cluster of drums ... -
Nonlinear Estimation with Applications to Drilling
(Doctoral Theses at NTNU, 1503-8181; 2011:60, Doctoral thesis, 2011)This thesis addresses the topic of nonlinear estimation and its applications. Particular emphasis is given to downhole pressure estimation for Managed Pressure Drilling (MPD), but due to the mathematical similarities of ... -
Nonlinear Identification of Ship Autopilot Models
(Master thesis, 2009)The purpose of this thesis has been to develop methods for identification of nonlinear models to be used in ship autopilots. An accurate model is essential when developing autopilot systems. Although a number of identification ... -
Nonlinear Manoeuvring Models for Ships: A Lagrangian Approach
(Doktoravhandlinger ved NTNU, 1503-8181; 2008:114, Doctoral thesis, 2008)his thesis analyses manoeuvring ships. Good modelling is vital for effective control system design and simulation. Such models are invaluable tools in areas such as training and decision support. This thesis prioritises ... -
Nonlinear Model Predictive Attitude Control for Fixed-Wing Unmanned Aerial Vehicle
(Chapter, 2019)Exploiting the physical limitations on the maneuverability of a fixed-wing Unmanned Aerial Vehicle (UAV) and simultaneously respecting its flight envelope and actuator constraints is a demanding task, for which Nonlinear ... -
Nonlinear Model Predictive Control (NMPC) of Separation Trains
(Master thesis, 2009)An evaluation of Modelica Fluid Library 1.0 has been performed and the new library has been found to be more efficient both during modelling and during computations than the beta version of the library. The separator model ... -
Nonlinear Model Predictive Control of Electrical Submersible Pumps based on Echo State Networks
(Peer reviewed; Journal article, 2022)Employed for artificial lifting in oil well production, Electrical Submersible Pumps (ESP) can be operated with Model Predictive Control (MPC) to drive an optimal production, while ensuring a safe operation and respecting ... -
Nonlinear Model Predictive Control of Offshore Hybrid Power Systems
(Master thesis, 2021)Produksjon av olje og gass på utaskjærs plattformer er en viktig industri for mange land over hele verden. Uheldigvis medfører den nåværende produksjonen høye utslipp av drivhusgasser. En løsning som allerede er i gang ... -
A nonlinear model predictive control scheme for sensor fault tolerance in observation processes
(Peer reviewed; Journal article, 2020)This article addresses the problem of designing a sensor fault‐tolerant controller for an observation process where a primary, controlled system observes, through a set of measurements, an exogenous system to estimate the ... -
Nonlinear Model Predictive Control using Derivative-Free Optimization
(Master thesis, 2013)Today it is common to solve the Non-Linear Programming (NLP) problem arising in NMPC by the use of gradient-based optimization. However, these techniques may not be suited if the prediction model, and thus the optimization ... -
Nonlinear model predictive control with explicit back-offs for Gaussian process state space models
(Chapter, 2019)Nonlinear model predictive control (NMPC) is an efficient control approach for multivariate nonlinear dynamic systems with process constraints. NMPC does however require a plant model to be available. A powerful tool to ... -
Nonlinear Model Predictive Path-Following Control for fixed-wing Unmanned Aerial Vehicles
(Master thesis, 2021)Denne masteroppgaven studerer path problemet. Path problem refererer til å styre et kjøretøy og deretter holde det nær en forhåndsdefinert geometrisk kurve i et Euclidean space. I motsetning til trajectory tracking er ... -
Nonlinear Model Predictive Pressure Control during Drilling Operations
(Master thesis, 2008)Drilling into mature, depleted fields is often difficult because of tight pressure margins. Increasing the pressure control will enable wells that previously were considered undrillable, to be drilled. Enabling drilling ... -
Nonlinear model-based control of two-phase flow in risers by feedback linearization
(Journal article, 2013)Active control of the production choke valve is the recommended solution to prevent severe slugging flow conditions at offshore oilfields. The slugging flow constitutes an unstable and highly nonlinear system; the gain of ... -
Nonlinear Modeling, Controller and Observer Design for Roll Damping on a Surface Effect Ship with Split Air Cushion
(Master thesis, 2017)For the first time, a controller is presented for roll motion damping, exclusively by the use of air cushion pressure, on a surface effect ship (SES) with a longitudinally split air cushion. The Wave Craft, manufactured ... -
Nonlinear modelling and control of underwater vehicles
(Dr. ingeniøravhandling, 0809-103X; 1999:39, Doctoral thesis, 1991)