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60 Uppsatser om Modular Fixture (ModFix) - Sida 4 av 4

Implementation of a Data Handling System for a Scientific  Magnetometer on a CubeSat

Since their invention in 1999, CubeSats have become a widespread standard for small picosatellite missions. CubeSats allow for quick development of satellite payloads and launch in space without the high costs of a normal satellite. Emphasis during the CubeSat design process is placed on use of commercialoff- the-shelf (COTS) components and reuse of previously-designed units.This report describes the interfacing of a scientific magnetometer, the Small Magnetometer in Low-Mass Experiment (SMILE) to such a CubeSat mission, the Space Weather using Ion spectrometers and Magnetometers (SWIM). Design of a complete platform for use in multiple such missions is presented here.Modularity is one of the key aspects followed in the course of the work. A new board containing the analog pick-up and compensation circuitry for SMILE has been designed to fit inside a CubeSat frame.

En studie av en industrirobots beteende vid borrning

In the assembly process of airframe structures there are many drilled holes and on some parts the holes are mainly drilled manually with pneumatic handheld drilling machines. During conventional drilling in metal, burrs appear. To remove these burrs the parts of the structure must be separated and deburred before they can be put together for fastening. This is a time consuming measure and therefore expensive. To facilitate this process and lower production costs some parts of the process needs to be automated.A part of this thesis was a project in co-operation with Saab, Novator, Specma Automation and the University of Linköping.

Alla ska va med... : En essä om storarbetslag, modularbete och dess förutsättningar och konsekvenser

I begin my essay with a story that illustrates how a preschool activity organized on a modular work can be perceived. I describe how the environment has been rebuilt and modified to accommodate one large group of children instead of two smaller groups as before. Management´s justification for the change is that it is carried out to give the children better conditions for their learning, but my understanding is that it also hampers preschool-teachers´ abilities to implement their assignment.I try to understand what benefits module work by examining what well-known researchers believe is important for children´s learning in environmental and preschool teacher´s importance. When I use what I have learned to analyze my story, my opinion is that the change of the preschool activity not have just a positive impact but also entails that preschool teachers find it difficult to be present and in interaction with the children as several well-known researchers notes is important for children´s learning. I discuss how a large and rich environment at the same time can be perceived as incalculable for teachers, which can result in not all of the children being paid attention to in the preschool activity.

Central Peripheries: speculation and strategy for a land less mentioned

As the contemporary discourse surrounding urbanism is almost exclusively focusing on aspects of density and traditional urban qualities, it entrenches notions of what constitutes a proper city and countryside. But beyond this urban-rural dichotomy is another highly contemporary landscape. A territory usually mentioned as sprawl, peri-urban, wasteland, edge city, etc. Although its existence is due to mobilization, telecommunications, globalization and other phenomena of modern life, it is a landscape without an own name or place in public awareness.This thesis provides a case study of how to map and intervene in such a landscape, specifically along the border between Malmö and Burlöv municipalities in southern Sweden. Its structure is composed of a sequence of three parts:1 Spatial Conditions:Divided up in the sections Network, Fringe and Void.

Styrsystem : För en forskningsutrustning

The division of Engineering Materials at Linköping University, department of Management and Engineering, conducted a research project concerning Fatigue life of thermal barrier coatings during 2009. During this project equipment to provoke these fatigue failure by rapidly heating and cooling test subjects in cycles, was ordered.Design and manufacturing of the equipment was handled internally at LIU.The equipment was built using a furnace that is lowered and raised over the table where the test subject is placed. To keep the temperature of the furnace a lid slides in place to close the downward facing opening of the furnace when it is in the raised position. On this door there is nozzle that is used to cooling of the test subject by air.To make sure that the equipment can work independently you need an automation controller that can evaluate if movement can occur without danger of collisions. The control system also needs to monitor that all elements are performed according to plan.This degree project is based on a modular system from OPTO 22 and includes the configuration of a PLC that will be supplied with logic and a user interface.The degree project resulted in a graphic interface in which a user can set desired values for different parameters and get information about current values for them.

How should information be handled to facilitate and benifit from modularity? A case study of Clarkson Inc.

Problem discussion: How should information be handled to facilitate and benefit from modularity? How should Clarkson Inc. adapt their information handling to modularity and what benefits can be reaped by doing this? Purpose: The purpose of this master thesis is to help Clarkson Inc. adapt their information handling to modularity and to extract theories, methods and tools to guide companies in similar situations.

Trapphus i träplattform för CBBT

Industrialization of construction is by some considered to be a solution to the building industry's problems about the lack of quality, high production costs, low productivity and poor environmental adaptation. Meanwhile, industrialized construction partly earned a bad reputation after the million housing program. As large-scale projects where promoted during this period, it worked very well to use the technique of construction elements. In the mid seventies though, criticism arose which claimed that the aesthetic qualities had been deprived in the corporates effort to make housing production as efficient as possible.Tyréns, Derome and CBBT (centre for building and housing in wood) cooperates in a development project to develop a building system for 4-8-storey buildings, consisting of three platforms: a technology platform, an IT platform and a processing platform. The technology platform consists of flexible, industrially built flat modules of wood and from this platform the subsystem stairwells, is broken out.

Utveckling av en dynamisk Simuleringsmodell av en skotare

The predominant forestry harvesting method is based on the harvester-forwarder method, theharvester folds, branches and cuts trees, and sorts the logs into piles, while a forwarder transportsthe logs to a landing area.This master thesis work is about realization of a dynamic forwarder simulation model, and itspurpose is to provide an integrated forwarder simulation model in MATLAB/SimMechanicswhere the forwarder is based on a concept using pendulum arms to connect wheels and chassis.Active suspension control is developed and implemented into the simulation model, and finallycompared in simulation with passive suspension.In a first step, an integrated forwarder simulation model is developed, containing a simplifiedforwarder model, a tire-to-ground interaction model and a test track model. The simplifiedforwarder model is based a rigid multi-body system with a spring-damper suspension of thependulum arms. The tire-to-ground interaction model calculates the reaction forces, friction fromthe ground and applies the propulsion force. The test track model is a simplified version of thereal test track in Skogforsk. The propulsion wheel torque control is used to regulate theforwarder speed.

Dagens och morgondagens studentbostäder : Hur kommer studenter bo och hur vill de bo?

Ett samhällsproblem i Sverige under de senaste åren har varit antalet studentbostäder på landets lärosäten. Idag kan enbart fyra studieorter erbjuda bostadsgaranti för sina nytillkomna studenter, där bostadsgaranti innebär bostad inom 30 dagar. Byggandet av studentbostäder stannade av helt år 2010 då endast 125 stycken blev byggda. Från 2012 och framåt har trenden börjat vända och framtiden ser bättre ut men det är inte i närheten av att kunna mätta det behov som finns. Idag bor cirka 25-30 procent av Sveriges studenter i studentbostäder.

Hydraulisk och termisk grundvattenmodellering av ett geoenergilager i Stockholmsåsen

Geothermal energy can be extracted from an aquifer, where the groundwater is used as heatexchange medium while heat and cold are stored in the surrounding material in the aquiferand to some extent in the groundwater. Application of aquifer storage for the use ofgeothermal energy is mainly used in large scale facilities and is limited to sites with suitableaquifers in the form of ridges, sandstone and limestone aquifers.Löwenströmska hospital in the municipality of Upplands Väsby, north of Stockholm, islocated nearby the northern part of the Stockholm esker. This means that it can be profitableand environmentally beneficial for the hospital to examine the possibilities of aquifer storagein the esker material next to its property.The purpose of this master thesis has been to investigate if geothermal energy storage with aseasonal storage of heat and cold can be applied within Löwenströmska hospital?s propertyarea using groundwater modeling. A hydraulic groundwater model was constructed inMODFLOW based on a simplified conceptual model of the groundwater system.

Reglering av turbins ledskenor i vattenkraftverkmed hjälp av elektriska ställdon

Hydropower is the largest renewable energy source available in today's society. Operation and production is handled by high-tech electronics. This thesis is done on behalf of Statkraft Sweden AB who wants to explore the possibility of replacing the hydraulic cylinder with an electric actuator, generally as well as a case of a small power station on the river Nissan. Whether it is the chaplain or francis turbine vanes are actuated by hydraulic cylinders. Because of Gustavsberg hydropower is inconstant operation, this report is based on power calculations, which are read and computed according to the available hydraulic diagram.

Termisk hantering av litium-jon- batterier i elektriska drivsystem

The automotive market is currently undergoing a historical change where stricter emission legislations and ever increasing fuel costs have intensified the search for effective alternatives to the conventional internal combustion engine, which has resulted in a substantial trend towards electrification of powertrains. Storage of electrical energy is the fundamental component in this technology where the lithium-ion batteries are currently considered as the most appropriate solution. Lithium-ion batteries, however, as other types of batteries, can only be used efficiently and durably within a specific temperature range.This Master thesis has been carried out in collaboration with Electroengine in Sweden AB, situated in Uppsala, which has an ongoing project regarding development of a modular battery system for electric powertrains. The project is at a stage where an initial prototype has been developed which provides the foundation for this thesis. The study has addressed the battery system performance from a thermal perspective, in order to validate the ability of the system to create a thermally serviceable environment for the lithium-ion battery cells.

Förutsättningar för en lyckad lansering av ?Modultrall? : en studie av konsumenter, små byggföretag och bygghandeln

Analytiker betonar att produktutveckling är viktigt för att lyckas i skogsindustrin. De nordiska sågverken fokuserar idag på att förbättra sin marknadsposition genom produktförnyelse, nya marknadsstrategier och omstrukturering av värdesystem. Ett företag som gjort detta är AB Karl Hedin. Företaget har fått stark genomslagskraft genom egna produkter. AB Karl Hedin avser att till byggsäsongen 2013 lansera en ny egen produkt: En färdig ?modultrall? med längden 3,0 m.

Drivanordning för bandtransportör : En förstudie till en modulbaserad drivsektion

Kellve tillverkar transportörer för bulk- och materialhantering och företaget erbjuder specifika lösningar utefter kundens egna önskemål och tycke. Transportören består typiskt av en drivsektion, fackverksram och säkerhetsutrustning. Syftet med examensarbetet är att skapa ett koncept för en ny modulbaserad drivsektion för att kunna fortsätta erbjuda kunden samma utbud som tidigare, fast med färre antal artiklar. Antal varianter av drivsektioner Kellve erbjuder sina kunder idag identifieras och presenteras. Det nya konceptet av drivsektionen visualiseras genom en CAD-modell och en hållfasthetsanalys utförs.

Produktionsförberedelse med avseende på tre nyckelfaktorer: DFA, modularisering, samt monteringssystem : En analys av framtida monteringsmöjligheter för en brandrobot av typ FUMOTM

AB Realisator, ett management consulting företag med fokus på marknads- och affärsutveckling, har tidigare funnit att brandmän i dagsläget inte använder sig av någon form av robotar vid hantering av bränder. Således startades projektet FUMOTM; en robot vars främsta syfte är att gå in i bränder och filma/scanna ytan för att förenkla brandmännens arbete och potentiellt rädda liv. I framtiden har AB Realisator även funnit det möjligt att lägga till någon form av brandsläckningsmöjligheter och en robotarm på FUMOTM. Syftet med föreliggande rapport är att utvärdera vilka framtida produktionsmöjligheter som finns för denna robot. Arbetet innefattar att skapa en modulplattform för roboten, utforma de framtida tekniska lösningarna robotarm och släckanordning på ett monteringsvänligt sätt enligt Boothroyds DFA-metod, samt att ta fram ett monteringssystem som uppfyller den kravspecifikation som AB Realisator har lagt fram.

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