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When controlling the drum water level of marine boilers the rolling of the ship may cause problems. The drum water level gets a sinusoidal disturbance, which causes a disturbance of the feed water control valve. This disturbance may proceed through the feed water pump to other steam consumers. The rolling inflates other boiler parameters too. It will be shown that stability problems may appear if
The main part of this work consists of the developing of software support. The lack of such support is the main problem with micro computers, independent of the hardware realization. The cross assembler developed, having a PDP 11 as host computer and KMV-version 2 as target computer, will be a great help when writing assembler programs, while the macro assembler raises the language to a higher lev
This MS thesis report provides documentation of results and experience obtained during the spring 1974. The main purpose is to show the construction of an interactive program package, which is used for simulations of some special types of adaptive controllers, called self-tuning regulators. According to the experience at the division, the program package is command driven. A part of the report pre
This treatise gives constructing principles, hardware ones as well as software ones, for an operator's console adapted to the process computer and DDC software package of the Division of Automatic Control. The console is implemented with a micro computer trademark TRANSINTRO with CPU INTEL 8008. The display unit consists of four registers: "node identity", "parameter identity&qu
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 wri
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
