Automatisk övervakning och diagnos av pappersmaskin

Robust On-Line Estimation

In the presence if poor excitation and abrupt changes of a time-varying system the Recursive least square (RLS) with forgetting factor is not able to track the parameters in a suitable way. The purpose of this thesis is to investigate different kinds of proposals of algorithms to deal with the phenomenons arising, such as estimator windup or too slow convergence of the estimations. Attention is al

Motion Control with Slosh Suppression

Analog and Digital Signal Processing in an Optical Application

The thesis consists of two parts. Registration of Digital Images: Registration of images is a fundamental task in image processing. This is to match two or more images taken, for example, at different times, from different sensors or from different points of view. The methods used to register images are striving for a similarity metric indicating when the images are correctly registered. A similar

Modeling and Control of the Quadruple-Tank Process

Digital Control of a Gantry Crane with Unconventional Sampling

Automatic Tuning of Multivariable PID controllers

Effects of Friction on the Furuta Pendulum

Object Oriented Simulation of a Paper Machine

Controlling a Ball and Plate Process Using Computer Vision

Tuning of Gain Parameters in Commercial Servo Controllers

Analysis of Time Delays in Synchronous and Asynchronous Control Loops

Interlinked control loops with asynchronous sampling can give rise to a time varying time delay which varies irregularly. Here we examine ways to model these effects for an arbitary number of control loops, and to build up a probability density function, and current delay, before implementing a controller.

Dual Control of an Integrator Using Neuro-Dynamic Programming

The dual control problem for an integrator with time-varying gain is reviewed. The neuro-dynamic programming technique of approximate policy iteration is explained. It is shown how a version of this technique, which employs a Gaussian radial basis function network, can be used to calculate a good sub-optimal dual controller for the integrator. This controller performs much better than the certaint

Control of Chromatography Column in Production Scale

Modeling of a Tetra Pak deaeration process

Modeling and Control of a Continuous Stirred Tank Fermenter with Cell Recycle

A model for a CSTF with a cell recycle unit was identified in collaboration with Nestlé. Simulations of the model showed that it is possible to control the system in order to concentrate the biomass to 10-13 g/l with an overall dilution rate set to 1 1/h. The bacterium studied was Lactobacillus johnsonii LJ1, which produces lactic acid from lactose. The filter in the cell recycle unit was a cross-

Methods for Tone-Suppression in Sigma-Delta Modulators

Adaptive Eccentricity Compensation—An Experimental Study

Remote Control of a Mobile Robot Using Petri Nets

Reglering av siktesplattform med asynkronmotor

The task of this masters thesis is to investigate the properties of Natural Field Orientation, NFO, a new patented method for controlling the asynchronous motor. The intention is to see whether NFO would make it possible to, in the future, replace the expensive hydraulic motors that are being used in CelsiusTech Electronics' radar directors today with inexpensive hydraulic motors that are bein