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Kockums Mekaniska Verkstad, Malmö, is building a submarine rescue vehicle (URF) for military and civilian purposes. The theoretical and experimental background for the dynamics of the submarine is incomplete. One miss is for example a total model for the submarine, that is, what happens when you pull the control lever. We have constructed such a model suitable for simulations on a computer in the
Our task has been to design a dynamic model for a super heater of a marine steam boiler on a turbine vessel. We have also investigated different methods for control of the temperature of the outflowing steam by computer simulation. The aim has been to make the regulation faster at different load and disturbance.
In our models we have described characteristics for valves, regulators and st
A simple flight simulator has been built up, using an analog computer to simulate the aircraft dynamics.
The dynamics model used, does not represent any particular aircraft. It is nevertheless representative of a large group of conventional aircraft. Simulations clearly show an increased ease in handling the flight simulator, if the pilot has flying experience. This indicates a similarity betw
The main purpose of this investigation was to compare, by simulations, the ability of an adaptive regulator and a PID-regulator to keep a ship on desired course with small rudder deflections. Manual steering in confined waters of the simulated ship was also performed. Recordings of delivery tests from real ships were compared to simulations. The non-linear mathematical model of the ship, which was
Our task has been to compare the ability of three different regulators to control some single-input single-output systems with unknown parameters. The regulators were a minimal variance regulator, the Self-TUning REgulator STURE and an active suboptimally dual regulator. No simulations with the minimal variance regulator are shown since it turned out that it performs as STURE on systems with const
In this report we present a non-linear mathematical model of the feed water system onboard a 250 000 ton dwt turbine tanker in the Kockum Hull 540-series (Esso Dalriada). Well-known relations from the theory of fluid mechanics give the main part of the model. A few equations are approximations of the manufacturer's data curves. The most important dynamical equations embrace acceleration of the
