Modelling and Control of an Electric Arc Furnace

Comparison of two Friction Models

Friction modelling is a delicate problem which poses several challenges to control engineers. This work focuses on two recent models which describe friction with nonlinear dynamical systems: The Lugre model, and the model of Bliman & Sorine. Comparisons are made concerning friction phenomena captured, computational issues, identification of model parameters and behaviour at zero-crossings of t

Control of Unstable Systems with Input and Rate Saturations

The Effect of Friction on Stabilization of an Inverted Pendulum

This thesis investigates frictional effects on the stabilization of a rotating inverted pendulum. Because of friction, limit cycles arise when trying to stabilize the inverted pendulum. The stabilization is done using linear state feedback. For estimation of the states, Kalman filters are used. Both real-time experiments and simulations are performed. Two friction models are used, one classical wi

Control of Rolling Missile Based on Measurement Information from Accelerometers

This report is a study on placement of accelerometers in a rolling missile. A Kalman filter is used for estimation of some states of the rolling missile. The rolling angle is assumed to be known. The states are fed back to give the missile desired dynamics. Reference signals in the form of desired accelerations are also introduced. The report shows that one transverse measuring accelerometer give

Katalytisk avgasrening av fartygsmotorer

Recent years intensive measures of land-based emissions have increased the share contributed from ships and other marine activities. The main problem here is the nitrogen oxides emitted from today's fuel-optimized diesel engines used by the majority of ships. ABB Fläkt Marine is one of the very few companies that provides a solution to emissions on nitrogen oxides. This is made with a techniqu

Dynamic Picture as a Learning Tool in Control

Robustness Analysis of a Wind Power Plant

Dynamic Virtual Realities with Sound Models

Facilities to present simulation results as animations on the Internet have been developed. They can take simulation results from the modeling and simulation environment Dymola and convert them to a Virtual Reality Model Language (VRML) representation, which is the new Internet protocol for displaying three dimensional graphical worlds with sound effects. Mathematical models for sound have been de

Övervakning av regulatorer via Internet

The possibility of supervising controllers in buildings with the help of Internet and Java is investigated. The task is to develop a computer system with necessary software that enables connection over Internet from a client computer to a server computer that contains information about the controllers in a data base. It should be possible to study values and attributes of the controllers. Java and

Identification and Simulation of Paper Machine

Performance Improvement of PI-Control Using Nonlinear Feedforward

Java Based Picture Editing and Monitoring for Power Control Systems

Nonlinear Frequency of an Ultrasonic Generator

Dynamic Process Simulation of Wet Systems for Flue Gas Cleaning

Modellering av processer i reglersystem för effekt, tryck och matarvatten i kokarvattenreaktorer

Validering och objektorienterad modellering av transformator

Matlab som 'compute server' för inbyggda system -- beräkning av robotrörelser

Öppna regulatorer för inbyggda system

Prediktion av OMX-index med holografiska neurala nätverk