The division of Electricity at Uppsala University runs a project called Lysekil project, they have designed a Buoy that uses the waves to create electric power from a generator attached to the bottom of the sea.Uppsala University is closely connected with the company Seabased and the university makes use of their facilities in Lysekil. When they designed the Buoy issues occurred, the geometric design was flawed, brackets with a short shelf life and it is generally uneconomic.A study visit was done in Lysekil on Seabased facility. With this visit the project started, which is to improve the design of the Buoy and the attachment of wires leading to the generator. In this project we have chosen to use a beam system with three beams that are attached to the Buoy. Then a wire attached to a plate that sits between the beams will be leading to the generator. Two proposals for construction are created, what distinguishes them are the brackets between the beams and the Buoy.From these constructions, the design that is considered most optimal for our project is chosen.All parts of the Buoy have been modeled and the drawings are designed in ProEngineer software.The two constructions are compared with each other, but the whole focus is on the second and final structure. The report begins with an introduction describing Lysekil project, and a task description of our project.The project aims to produce an optimal Buoy that will be easy to design, materials restrictive with good durability and an economical solution.Wave power true function has been studied, mechanical and finite element analysis of beams, Buoy and plate design.This has been presented in this report, where in the various chapters can read more about the processes. Although the relevant facts and information on this project and Buoy development is included.

This report investigates a possible solution to the problem with adapting wave powerplants to work in countries with tidal water. The wire connecting the Buoy at the surface with the generator at the bottom needs to adjust to the varying water depth. Our solution to this problem is to attach the wire to a jack which is then placed inside the Buoy. The jack is then powered by an electric engine. The report discuss what forces the Buoy will be exposed to and then the structural integrity of the design is evaluated through simulations.

The division of Electricity at Uppsala University runs a project called Lysekil project, they have designed a Buoy that uses the waves to create electric power from a generator attached to the bottom of the sea.Uppsala University is closely connected with the company Seabased and the university makes use of their facilities in Lysekil. When they designed the Buoy issues occurred, the geometric design was flawed, brackets with a short shelf life and it is generally uneconomic.A study visit was done in Lysekil on Seabased facility. With this visit the project started, which is to improve the design of the Buoy and the attachment of wires leading to the generator. In this project we have chosen to use a beam system with three beams that are attached to the Buoy. Then a wire attached to a plate that sits between the beams will be leading to the generator. Two proposals for construction are created, what distinguishes them are the brackets between the beams and the Buoy.From these constructions, the design that is considered most optimal for our project is chosen.All parts of the Buoy have been modeled and the drawings are designed in ProEngineer software.The two constructions are compared with each other, but the whole focus is on the second and final structure. The report begins with an introduction describing Lysekil project, and a task description of our project.The project aims to produce an optimal Buoy that will be easy to design, materials restrictive with good durability and an economical solution.Wave power true function has been studied, mechanical and finite element analysis of beams, Buoy and plate design.This has been presented in this report, where in the various chapters can read more about the processes. Although the relevant facts and information on this project and Buoy development is included.

This thesis gives suggestions as to how to design a wooden-based wave-power Buoy. The thesiswas carried out at Uppsala University in collaboration with the Division of Electricity and AppliedMechanical Engineering. The product was conceived and developed taking into consideration anumber of requirements put forward by the supervisor, Magnus Rahm. The most importantdemands were that the material used should be able to withstand pressure from the sea withoutbeing damaged and that the production costs should be low.Department of Engineering Sciences, Division of Electricity at Uppsala University was visitedseveral times to discuss issues including the various ideas with the supervisor Magnus Rahm, andwith several people in the department.The work started by studying available literature in order to get background information aboutsuitable methods available for the project and to see how similar projects were carried out. Thereason for this was to get a better understanding of this particular problem and how to solve it.After consulting the supervisor, the group decided to construct four different Buoys using fourdifferent materials.

This thesis gives suggestions as to how to design a wooden-based wave-power Buoy. The thesiswas carried out at Uppsala University in collaboration with the Division of Electricity and AppliedMechanical Engineering. The product was conceived and developed taking into consideration anumber of requirements put forward by the supervisor, Magnus Rahm. The most importantdemands were that the material used should be able to withstand pressure from the sea withoutbeing damaged and that the production costs should be low.Department of Engineering Sciences, Division of Electricity at Uppsala University was visitedseveral times to discuss issues including the various ideas with the supervisor Magnus Rahm, andwith several people in the department.The work started by studying available literature in order to get background information aboutsuitable methods available for the project and to see how similar projects were carried out. Thereason for this was to get a better understanding of this particular problem and how to solve it.After consulting the supervisor, the group decided to construct four different Buoys using fourdifferent materials.

Examensarbetets mål är att hitta möjligheter till förbättring av navigeringsprestandahos en undervattensfarkost med hjälp av bojar utrustade med GPS. Dessabojar skickar positionsdata till farkosten som med hjälp av ett extended kalmanfilter(EKF) integrerar denna information till att förbättra sin navigering.Ett ytterligare mål med examensarbetet har även varit att skapa en simuleringsmiljöför en liten farkost, där eventuella nya algoritmer eller sensorer, vidframtida behov, på ett smidigt sätt skall kunna integreras för utprovning. Dettahar i arbetet inneburit en anpassning av en fysikalisk 6-DOF modell till enliten undervattensfarkost samt en reglerdesign för detta system i form av kaskadkoppladePI-regulatorer och parameterstyrning. Simuleringsmiljön är skapad medhjälp av Matlab och Simulink..