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This master thesis is about the regulation of temperature and flow of a steaming fluid when it passes through a heater. There are problems with the present regulation of temperature when the flow rate varies.
The study has dealt with two control methods to regulate temperature and flow of the infusion fluid. These methods are different from the method to date.
The first method is
The purpose of this work was to investigate if the choice of frequency, on a pulse width modulated control signal to a DC motor, might influence the behaviour of the system, as wall as to see how the system reacts in connection with the controlling by means of such a signal. I came to the conclusion that the frequency was not critical seen from the system's point of view, but should be chosen
The report describes a control system for a new mechanical design of a stabilized platform. The platform design is based on rotation of two medges. It has the advantage that mechanical design is very simple. A key difficulty is that the transformation from platform orientation angles to gimbal angles in nonlinear and that it has a singularity. A control system based on local linearization of the t
In this report heat quantity measuring and temperature regulation of smaller heating networks have been studied. At lower flows, as well as at lower difference temperatures, the accuracy of the measurement is very low. Today's control of a heating plant endeavour to let the temperature of the water into the heating network follow the heat requirement. This control strategy leads to small heat
