The goal of this work is to use basic physical laws to construct a model and a controller for an industrial gas turbine. The model shall simulate all of security and controlling interesting process variables, with resonable accurancy. The controller shall use the process up to the limits to get it as fast as possible at load changes. An unlinear model for a gas turbine STAL GT-120b has been establ

The achievable accuracy of models derived by identification depends on a number of factors, e.g. the conditions during the experiments. The accuracy is studied by simulation for a number of different experiments: open loop experiments with different types of input signals and closed loop experiments with different types of regulators. For this purpose a special simulation program has been written

A simple mathematical model has been made for the heat exchange in a freezing chamber. By this the contents of the room have been regarded as a warm and a cold mass. Equations for convection and radiation between these masses, the room air and the cooling pipes have been made from physical data. The heat transference in the articles, which is described by partial differential equations, has been a

The aim of this report is to provide an extensive description of regulator RD100, and its subsystems, from an electrical point of view. The report is written in a step-like manner in order to suit various kinds of readers, from those who only need a basic knowledge about the regulator, to those who will be eventually redesigning the whole regulator or parts thereof, to make it meet future demands

The purpose of this report is to study dynamic models of processes used in waste water treatment. The report consists of a literature study and identification of two different unit processes. The literature study consists of a thorough search of some relevant periodicals, and the result is presented as a collection of abstracts of articles, treating dynamic aspects of waste water treatment techno

This paper deals with different methods for minimum variance control of linear, timeinvariable and sampled single-input single-output systems. Furthermore the amplitude of the control signal will be constrained. The most natural method is to make use of a minimum variance strategy, which minimizes the variance of the output signal. But this only when no saturation is applied. Saturation of the inp

The master thesis intends to investigate the advantages and disadvantages with the simulation language SIMSCRIPT. The programming language was learned from manual and books about SIMSCRIPT (see references). Two models were made ato describe two different systems, one fictive and the other already existing. The first model simulates the work at an assembly line. The model illustrates the use of the

First in this master thesis some classical dynamic models for macroeconomic systems are presented. Then follow comparisons between keynesian and monetarist models. The greatest part of the thesis deals with different constructions of monetarist models for Sweden in the shape of linear difference equations with constant coefficients. The starting-point has been a well-known examination of the U.S.