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Samkörning av motorer

In this report studies have been done on two engines driving a common load via a mechanical gear. The engines are presumed to be linear within their working range. The aim is independently of load variations to get the engines' outgoing angular frequency to be equal to a given reference and to distribute the power between the engines in a given proportion. The report shows that certain arrange

Självlärande klassificering

Consider a system recieving signals from a signal-source. The signals describe different input situations. The purpose of the system is to classify the current situation. This can be obtained by means of recursive algorithms. The problem of finding such algorithms can be approached in many different ways. In this report we will assume a minimum of apriori information about the signals and the clas

Utmatning på plotter

The task was to write a program for plotter output on a ink jet plotter built at Inst. för Elmät, LTH. This plotter puts dots of ink on a paper fastened to a rotating drum and it must have, for every x-coordinate in its turn, the y-coordinates in rising order where it shall put a dot. 0

Numerisk behandling av Kalmans ekvationer för tidsdiskreta system

In this report are discussed different algorithms for the state estimation problem according to the Kalman theory. It is shown that the highest accuracy is obtained with av algorithm consisting of three non-negative definite parts, but that shorter algorithms may be sufficient for certain systems. The necessity of enforcing symmetry on the algorithms is discussed together with different methods fo

Matematisk modell för sjön Trummen

The purpose with mathematical models in ecology is 1) to help to create better understanding of ecological systems behaviour and 2) to make it possible to estimate more accurately the effects of human interference in nature.

Om regulatorer för maximalekonomisk styrning av fartyg

This paper deals with optimal long-distance steering of large vessels. The purpose of the paper is to design a regulator, that keeps a vessel, when affected by different disturbances, on an economical course. The vessel is supposed to have constant speed forward and therefore the only steering variable is the rudder angle. From a mathematical model of the vessel, the equations of motion are calcul