This thesis of 15 hp has been implemented at Halmstad University, incollaboration with Saab Dynamics in Linköping. Saab Dynamics is a companyoperating in the defence industry where competition is tough. This necessitatesnew ways to increase efficiency in the company, which is the basis for this thesis.Saab Dynamics wants to introduce simulation driven design. Since SaabDynamics engineers have little experience of simulation, required a usermethodology with clear guidelines. Due to lack of time, they chose to assign thetask to students, which resulted in this thesis.The aim of the thesis is to develop a methodology in mechanical design, wherethe designer uses the FE analysis early in the design process to develop thestructures' mechanical properties.

This master thesis consists of the creation of shock absorber models for percussive rock drills. A model of the rock was also developed. These models were connected to existing models of the rock drill to create a complete simulation of the rock drilling process.When the models had been created the rock model was evaluated by comparison with measured values from lab tests. The verified rock model was then used to evaluate the shock absorber models.Four new shock absorber concepts have been developed. Three of these have been modelled, while the fourth have only been sketched and described.The evaluation of the models showed the following:? Simulations of the single shock absorber don?t correlate to reality very well.

In this final thesis two simulation models have been integrated. The simulation models are models of JAS 39 Gripen?s fuel system, software and hardware. The time consuming and costly work to develop software has made the department of fuel system to build two models in Xmath/Systembuild. The software model also simplifies the comprehension of how the software in the control computer of the fuel system works.

The purpose of this thesis has been to build a parameterized model of a prototype motor in the program Solidworks, to use in future optimization of aspects of effectiveness and weight. The result were two models. The first model were one minor part of the whole design in 2D, to be able to optimize and study the minor part with a faster loss simulation. The second model was the whole design in 3D. The whole model were done with the three programs Solidworks, Comsol and Matlab.

En historisk fallstudie om strukturförändringar i Matsushita Electric Industrial Co, Ltd under 1933- 2003..

This paper is the result of a case study conducted at Uppåkra Mekaniska AB during the spring of 2006. The task that was presented by Uppåkra was to develop a basis for a decision for the planning activities at the company, so that in the future they can create lot-sizes which are based upon a total cost perspective. Total cost in regards to lot-sizing is defined as the sum of the administrative reordering costs and warehousing cost per stock keeping unit.To collect data a series of interviews and observations were conducted. This data was then used during the lot-sizing simulation and analysis. The 15 units that the simulation was conducted on were grouped into three item classes depending how many different machine setups they required during the production process.

Tanken med studien var att försöka få en uppfattning om och problematisera kring hur elever tänker om och upplever historisk populärfilm. Vidare var syftet att utröna huruvida populärfilm i klassrummet är till gagn för historieundervisningen och om den kan bidra till elevers kritiska tänkande. Jag fann att historisk populärfilm hör hemma i historieundervisningen förutsatt att den följs upp med en klassdiskussion som syftar till att gemensamt lyfta fram kritiskt tänkande och aktiv bedömning av filmens innehåll. En annan slutsats jag drar av undersökningen är att lättsam, historisk populärfilm, gärna med komiska inslag, är att föredra vid filmvisning för yngre mellanstadieelever då denna typ av film underlättar processen av kritiskt tänkande och bedömning. Min tredje och sista slutsats är att filmvisning skapar en plattform för klassdiskussioner där alla med utgångspunkt från en gemensam referensram kan lyfta fram individuella erfarenheter, kunskaper eller felskaper vilket bäddar för ett ökat kunskapande i gruppen..

Ocean Thermal Energy Conversion, OTEC, is a sustainable energy conversion technology that is not yet commercialized. OTEC is a technology that utilizes the temperature difference in oceans between the warm surface water and the cold water at 1 000 m depth to run a Rankine Cycle. This technology can produce electricity and provide synergies like fresh water, air conditioning and aquaculture. A simulation program for three alternative OTEC systems has been created in order to decide which OTEC system is most profitable; closed, open or hybrid system. In this simulation a production cost analysis is performed in order to investigate and decide which one of the three systems that has the lowest production cost. The production cost analysis also analyzes if the profitability is affected by the size of the facility. After these analyzes, the most profitable of the three different OTEC-systems is expanded by an installation of solar collectors in order to see if the thermal efficiency is improved. The result shows that the most profitable system varies with the size of the facility.

Modelica is a multi-domain and equation-based modeling language. Modelica is based on object-oriented principles and non-causal modeling. The language is constructed to facilitate reuse and decompose models. The models and the modellibrary can modified to design a new nonlinear components.Object-oriented modeling is an excellent way to analyze and study large complex heterogeneous physical systems. The object-oriented modeling approach build on reusing and decomposition of models and non-causal modeling.Modeling physical systems often leads to a DAE system with index 2 or 3.

This master thesis studies how much the cycle time, i.e. the time it takes for an industrial robot to perform a given task, can be reduced if an extra degree of freedom (DOF) is added to the robot system. The extra DOF consists of a linear track, which is supposed to be used in an optimal way. The problem has been studied using simulations in the robot simulation tool RobotStudio. To be able to run an optimization in Matlab, with the RobotStudio simulation cycle time as the object function, communication between Matlab and RobotStudio has been set up with an interface written in Visual Basic.

Vi ville undersöka några svenska gymnasielärare i historias attityder till att låta sina elever arbeta kontrafaktiskt. Vilka svårigheter de ser med arbetet, hur de arbetar eller kan tänka sig att arbeta med det och om de såg några specifika för- eller nackdelar jämfört med mer traditionell undervisning? För att ta reda på detta utförde vi kvalitativa intervjuer med yrkesverksamma lärare. Vi hörde inte av oss på förhand om huruvida de arbetat kontrafaktiskt tidigare och vi väntade oss en viss skepsis mot arbetssättet. Men vad vi fann var att även om inte alla medvetet arbetat med det så var alla insatta i, och positiva till, metoden.

During year 2004 Ålö AB made significant change in their production process. The production of front loaders is nowadays highly automated with short operation times. To be able to control their process in a better way Ålö recently decided that they needed a tool for simulation of their production and to shift patterns. This final thesis started with a pilot study in Ålö?s factory in Brännland.

?Colosseum- Code of Hammurabi? var titeln på det spelprojekt jag deltog i under kursen ?Spelprojekt II? vårterminen 2006. Spelet är ett fightingspel för upp till fyra spelare som äger rum i en arena i öknen. Då tiden för exjobbet närmade sig bestämde jag mig för att vara med och vidareutveckla spelet till XBox 360.För att få ett proffsigare intryck av arenan till Colosseum valde jag att i en historisk kontext omarbeta arkitekturen efter storyn till ?Colosseum- Code of Hammurabi".I arbetet ingår att finna en lämplig setting och tidpunkt för arenan.Resultatet har blivit en arena som influerats av många olika kulturer, från den babylonska dynastin till Rom och det Parthiska imperiet.Eftersom historien inte alltid erbjudit nakna fakta har jag efter egen förmåga fyllt i de tomrum som uppstått för den kontextuella designen, men även behållit vissa av de stilelement som utmärkte designen i Colosseum- Code of Hammurabi..

This thesis work includes studies and simulation how magnetization of the translator in a linear generator for wave power can be automated. The translator is the moving component in the generator that is "dressed" with permanent magnets. The translator is magnetized with rectangle-shaped permanent magnets that are today's strongest permanent magnet type of neodymium-iron-boron (NdFeB).Eight equivalent metal sheets are mounted around the translator. The plates have milled tracks where 106 permanent magnets per sheet are mounted. Today the assembling of the magnets is done by hand, which is a very tedious and time-consuming work.  This project presents investigations about the automation of the translator magnetization theoretically and simulation results are preformed in ABB's robot simulation software RobotStudio. Even robot-held tool was designed that enables the robot to be able to magnetize the translator in a simple manner.  The investment cost is roughly 1.5 million SEK. With an economic life-time of five years, the investment costs are estimated to 24000 SEK / month.  According to the calculations, this project is very motivated to implement, as it provides savings up to 17 000 SEK per translator which is 10.2 million SEK assuming that the robot cell is operating at full speed the whole year.According to this thesis work the result is a 4x9 meter cell with two industrial robots of the type ABB IRB6650S.The cycle time to magnetize one translator was calculated to about 10 hours.This prototype of project can possibly be implemented in a full-scale production line and performed according to the calculations and simulations presented in the report. Further work is suggested to improve the tool.Lyssna .

This master?s thesis deals with integrating simulations using Agilents Electronic Design Automation tool ADS with customized Matlab scripts, for solving complex analog and digital radio architectures. In particular, it addresses predistortion, realized in the digital domain, of power amplifiers, modeled in the analog domain. The former is implemented in Matlab while the latter is implemented in ADS. Two versions of integrating the two systems have been tested: 1) Iterative approach on sample basis and 2) Scheduled batch solution by matrix inversion.