Logical control of a model railway is presented. The model railway is controlled by a PDP 8/s minicomputer. By energizing tracksections and switching turnouts the trains can be controlled.

The purpose of this report has been to find suitable methods and programs for simulation, in particular of production flow systems. Only few methods of this subject have been developed, and therefore a considerable time has been used to find the basic facts. The problem has been attacked with two different methods. The first one is a simulation program which has all decision rules mathematically d

Membranpotentialen hos en cell härledes som en funktion av membranens selektiva permeabilitet och koncentrationsgradienter över membranen. Hodkin-Huxleys nervmodell introduceras och med hjälp av digital simulering visas att den inte kan beskriva en lågfrekvent fyrande nerv. Enkla moditiferingar med bibehållen tolkning av ekvationerna ger en mer realistisk modell. Den modifierade modellen analysera

Different models of the solids-liquid separation in an activated sludge system are presented. The influence from the solids-liquid separator on the biological activities in the aeration tank is examined. The dynamics of the different separator models is discussed. Two simple control strategies for sludge removal has been tried out.

This report of master thesis describes two programming languages for micro processors namely: MLP for Intel 8008 developed at CERL, Great Britain and HILP 80 for Intel 8080 developed as master thesis at Lund Institute of Technology. The compilers generate assembly code and are intended to be implemented on a host computer. The compilers are based on the macro processor STAGE 2, and need about 15 K

This report provides results of simulations and a few different methods of designing controllers for sampled data systems. In the report a mathematical model of the exhaust nozzle control of a turbofan engine is shown. During the simulations great attention has been paid to the sensitivity of the regulators against variations of the parameters in the system, and the behaviour of control signal an

The goal of this work is to build a dynamic model for a steam power plant, using frequency and step-response analysis and use it for construction of an automatic controlling system. The model is to simulate all the variables necessary for controlling with reasonable accuracy. By using measurements at a power plant in x 14rebro, the transfer functions for the most important steam pressures and pro