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No. of bitstreams: 1 Dissertacao_Agência-Barco-Aprovada.pdf: 4270624 bytes, checksum: cafe099ca1c9d7e52e77a38bea7575fc (MD5) Previous issue date: 2015-11-19 / The challenge in offering public services infrastructure in less developed areas in Brazil, often furthest from the large urban centers, mobilizes society sectors in search of new and creative approaches that can reduce large interregional disparities. One of the shortcomings faced by some brazilians is the lack of access to the financial system, compromising their capacity of full insertion in the economy and making it more difficult to create and accumulate wealth, prevailing situation in Ilha de Marajó, in the state of Pará, which most of its sixteen municipalities presents low or very low Human Development Index (HDI). In order to change this reality, a traveling bank branch installed on a boat was designed in an innovative way, for the purpose of meeting the needs of the riverside people that lives in vast territorial extension, low population density, transportation difficulties and limited supply of information and communication technology (ICT). Thereby, through an exploratory and descriptive approach, this research aims to identify, from the ICT perspective, how the financial inclusion indicators are influenced by the Agência Barco (bank branch on a boat) in Ilha de Marajó. In addition to the theoretical study, empirical research was carried out by means of direct observation and semistructured interviews applied to users and employees of the Agência Barco (bank branch on a boat), over four days in two cities of Ilha de Marajó. Interviews content analysis techniques were applied in order to data analysis and identify financial inclusion elements, transposing the results to a heuristic model of dynamic infoinclusion (2iD), which was adapted to comprise inclusion financial constructs. The research outcome shows that the Agência Barco (bank branch on a boat) can provides the necessary access to financial services and products for Ilha de Marajó inhabitants, at the same time identifies opportunities to expand aspects related to financial education, enabling strengthen the dynamic components of the financial inclusion process, increasing awareness and, then, increasing demand for financial services and products. / O desafio de ofertar infraestrutura de serviços públicos nas regiões menos desenvolvidas do Brasil, geralmente mais afastadas dos grandes centros urbanos, mobiliza setores da sociedade na busca de abordagens novas e criativas que possam diminuir as grandes disparidades inter-regionais. Uma das carências vivenciadas por parte da população brasileira é a falta de acesso ao sistema financeiro, comprometendo a capacidade de plena participação dessas pessoas na economia, dificultando a geração e acúmulo de riqueza, situação essa presente na Ilha de Marajó, no estado do Pará, cuja maioria de seus dezesseis municípios apresenta Índice de Desenvolvimento Humano (IDH) baixo ou muito baixo. Para mudar essa realidade, uma iniciativa inovadora é a agência bancária itinerante instalada em barco, para atendimento a populações ribeirinhas de regiões com vasta extensão territorial, baixa densidade demográfica, dificuldades de transporte e limitações na oferta de tecnologia da informação e comunicação (TIC). Assim, essa pesquisa, com propósito exploratório e descritivo, tem como objetivo principal identificar, sob o ponto de vista das TIC, como os indicadores de inclusão financeira são influenciados pela atuação da Agência Barco na Ilha de Marajó. Além do estudo teórico, foi realizada investigação empírica, por meio de observação direta e entrevistas semiestruturadas com clientes e funcionários da Agência Barco, realizadas ao longo de quatro dias, em duas cidades da Ilha de Marajó. Para análise dos dados, foram aplicadas técnicas de análise de conteúdo às entrevistas, com objetivo de identificar a presença de elementos de inclusão financeira, transpondo os resultados para um modelo heurístico de infoinclusão dinâmica (2iD), o qual foi adaptado para contemplar constructos de inclusão financeira. O resultado da pesquisa demonstra que a Agência Barco consegue suprir as necessidades de acesso a serviços e produtos financeiros pela população da Ilha de Marajó, ao mesmo tempo em que se identifica oportunidades para ampliação de aspectos relacionados à educação financeira, possibilitando fortalecer os componentes dinâmicos do processo de inclusão financeira, com aumento da conscientização e consequente aumento da demanda por serviços e produtos financeiros.

Cette thèse vise à une meilleure compréhension de la dynamique du voilier et à la validation des outils numériques de prédiction de performances et d’optimisation par l'étude expérimentale in situ du problème aéro-élastique d'un gréement. Une instrumentation est développée sur un voilier de 8m de type J80 pour la mesure dynamique des efforts dans le gréement, de la forme des voiles en navigation, du vent et des attitudes du bateau. Un effort particulier est apporté à la mesure des caractéristiques géométriques et mécaniques des éléments du gréement, la calibration des capteurs et au système d'acquisition des données. Les principaux résultats montrent que le voilier instrumenté est un outil adapté pour les mesures instationnaires et soulignent l'amplitude de variation d'effort rencontrée en mer (20 à 50% de l'effort moyen dans une houle modérée). En outre, les variations du signal d'effort sont déphasées avec l'angle d'assiette, créant un phénomène d'hystérésis. Le comportement dynamique d'un voilier en mouvement diffère ainsi de l'approche quasi-statique. Les simulations numériques proviennent du code ARAVANTI, couplage implicite d’un code structure éléments finis ARA et d’un code fluide parfait, limitant son domaine de validité aux allures de près Les résultats de simulation sont très proches des cas stationnaires et concordent bien avec les mesures en instationnaire dans une houle de face. L'expérimentation numérique d'un gréement soumis à des oscillations harmoniques en tangage souligne l'importance de l'approche Interaction Fluide Structure (IFS) et montre que l’énergie échangée par le système avec la houle est reliée à la fréquence réduite et l'amplitude du mouvement. Certaines informations n'étant pas disponibles sur le voilier instrumenté, une expérience contrôlée en laboratoire est développée. Elle consiste en un carré de tissu tenu par deux lattes en oscillation forcée. Les mesures sur cette « voile oscillante » permettent d'étudier les phénomènes IFS avec décollement et sont utilisées pour la validation du couplage ARA-ISIS entre un code fluide Navier-Stokes (RANS) et le même code structure. / This work presents a full scale experimental study on the aero-elastic wind/sails/rig interaction in real navigation condition with the aim to give a reliable database of unsteady measurement. This database is used for the investigation of the dynamic behavior and loads in the rigging and for an experimental validation of an unsteady Fluid Structure Interaction (FSI) model. An inboard instrumentation system has been developed on a 8 meter yacht (J80 class) to simultaneously and dynamically measure the navigation parameters, yacht's motion, sails flying shape, wind and loads in the rigging. A special effort is made on mechanical and geometrical characteristics measurement, sensors calibration and data acquisition system synchronization. Results show that the instrumented boat is a reliable tool to measure the unsteady phenomena in navigation. Dynamic measurements at sea underline the load variation encountered, which represent 20 to 50% of the mean value in a moderate sea state. Oscillations of loads exhibit phase shift with the trim angle, reason for an hysteresis phenomenon, which shows that the dynamic behavior of a sail plan subject to yacht motion clearly deviates from the quasi-steady theory. Simulations are made with ARAVANTI, an implicit coupling of a Finite Element Method structural model ARA and an inviscid fluid model which restricts the simulation domain to upwind conditions. The simulation results compare very well with the experimental data for steady sailing conditions and show a good agreement in unsteady conditions (head swell). Numerical investigation of a sail plan submitted to harmonic pitching motion underlines the importance of FSI modeling and shows that the energy exchanged by the system with the swell increases with the motion reduced frequency and amplitude. Some information is not accessible on the instrumented boat and requires developing a controlled test case in laboratory. The experiment consists of a spinnaker fabric square mounted on two carbon battens moved in forced oscillation. This test case is used to study FSI phenomena with a separated flow and gives experimental results for the validation of the coupling ARA-ISIS of a RANS fluid model with the same structure model.

Ce travail s’inscrit dans le projet VOILENav qui vise à améliorer la compréhension des phénomènes d’Interaction Fluide-Structure appliqués aux voiles. Des comparaisons numériques expérimentales sont réalisées sur des mesures « in situ » au près à l’aide d’un code fluide parfait. Un critère, fondé sur l’équilibre du couple aérodynamique avec le couple de redressement, est proposé, permettant de vérifier l’hypothèse d’un écoulement attaché. Les précédentes études sur un voilier instrumenté ont montré les limites d’une approche « in situ » de par l’instationnarité naturelle liée aux évolutions du vent et de l’état de mer. Les autres limites résident dans la mesure de ces dernières – et tout particulièrement la mesure du vent réel – ainsi que dans le spectre des conditions rencontrées au réel. Des essais en soufflerie sont ainsi réalisés dans le cadre de ces travaux pour répondre, par une approche systématique et contrôlée, aux interrogations soulevées par les mesures « in situ ». Deux campagnes expérimentales successives, soutenues par le programme d’échange Sailing Fluids ont été menées dans la soufflerie du Yacht Research Unit de l’Université d’Auckland se focalisant sur les essais de voiles au près puis au portant. Les essais au près sont réalisés sur trois modèles réduits de grand-voiles d’IMOCA60 dans des conditions de réglages statiques et dynamiques. Le meilleur réglage statique est obtenu grâce à l’utilisation d’un algorithme d’optimisation original puis l’influence de l’amplitude et de la fréquence du « pumping » sont étudiés. Les performances aérodynamiques du système soumis à un réglage dynamique sont supérieures à celles du réglage optimum statique et un maximum est observé autour d’une fréquence réduite de 0.25 à 0.3. Au portant, les effets de l’instationnarité naturelle du spinnaker connue sous le terme « curling » (repliement du bord d’attaque) sont étudiés. Quatre modèles de spinnakers de J80 de forme identique sont testés pour différents matériaux et différentes coupes. Les mesures en soufflerie montrent que, pour des angles de vent apparent supérieurs à 100°, l’apparition du « curling » conduit à une augmentation de la force propulsive pouvant atteindre 10%. Les effets de la vitesse et de l’angle de vent apparent sont également étudiés et permettent d’extraire une fréquence réduite de curling indépendante de la vitesse de l’écoulement de 0.4 pour un vent apparent de 120°. L’étendue de la gamme de mesures explorées et le soin particulier apporté aux données expérimentales font de ces travaux une base de données remarquable pour des comparaisons avec des simulations de l’Interaction Fluide-Structure. / This work is part of the VOILENav project which aims to improve the understanding of Fluid-Structure Interaction applied to sails. Full-scale numerical experimental comparisons are achieved in upwind conditions with an inviscid flow code. A criterion using the equilibrium between the righting and heeling moment is suggested to check the attached flow hypothesis. Previous fullscale studies on instrumented boat are limited by the natural unsteadiness of wind and sea conditions and the measurement of these conditions. True wind computation and the wide range of encountered sailing conditions are still challenging. Complementary wind tunnel tests are carried out in this PhD project, using controlled conditions, to address some issues observed at full-scale. Thanks to the Sailing Fluids collaboration, two experimental campaigns in the Twisted Flow Wind Tunnel of the Yacht Research Unit of the University of Auckland have investigated upwind and downwind conditions. Upwind tests investigate static and dynamic trimming on three model IMOCA60 mainsails. The optimum static trim is determined thanks to an innovative optimization algorithm then the pumping amplitude and frequency are investigated. Aerodynamic performances under dynamic trimming are better than the optimum static trim with a maximum located for a reduced frequency about 0.25 to 0.3. For the downwind test, the natural unsteadiness known as curling (repeated foldingunfolding of leading edge) is studied. Four model J80 spinnakers with identical design shape are tested with different materials and cuts. Wind tunnel measurements show that for apparent wind angles higher than 100°, the curling apparition increases the drive force by up to 10%. Wind speed and wind angle effects are investigated and show a reduced curling frequency of 0.4 independent from the flow velocity for an apparent wind angle of 120°. The variety of the experimental conditions tested makes this work a precious database for Fluid Structure Interaction numerical-experimental comparison in the future.

Cette thèse présente une étude expérimentale sur un voilier instrumenté, menée pour décrire le comportement aéro-élastique des voiles et du gréement pour des navigations au portant. Les formes des voiles utilisées sont des surfaces non développables avec de fortes courbures provoquant une séparation massive de l’écoulement. De plus, les spinnakers sont des voiles fines et souples rendant l’interaction fluide-structure fortement couplée. A cause du non-respect de certaines règles de similitude, le comportement dynamique d’un spinnaker se prête mal à l’étude en soufflerie et nécessite une comparaison avec des mesures in-situ. Les simulations numériques instationnaires modélisant le comportement aéro-élastique des voiles et du gréement doivent être qualifiées et demandent également des validations. C’est pourquoi un système d’instrumentation embarquée est mis en place sur un J/80, un voilier de huit mètres de long. Il s’agit de mesurer dynamiquement la forme en navigation du spinnaker, les efforts dans les gréements dormant et courant, la répartition de pression sur la voile ainsi que le vent et les attitudes du bateau. La forme du spinnaker en navigation est obtenue grâce à un système de mesure photogrammétrique développé pendant la thèse. La précision de ce système, meilleure que 1,5%, permet de mesurer la forme générale de la voile ainsi que les déformations importantes telles que celles liées au faseyement du guindant. L’effort aérodynamique produit par le spinnaker est obtenu grâce à la mesure de l’intensité des efforts et de leurs directions aux trois extrémités (drisse, amure, écoute) ainsi que par la mesure des pressions sur la voile. Le comportement général du spinnaker est analysé en fonction de l’angle du vent apparent. Une nouvelle représentation utilisant les surfaces de Bézier triangulaires est développée pour décrire la forme tridimensionnelle du spinnaker. Quelques points de contrôles suffisent pour représenter la voile et caractériser le type de voile. Un comportement dynamique propre au spinnaker est également étudié. Le réglage supposé optimal d’un spinnaker est à la limite du faseyement, en laissant le guindant se replier légèrement. Cependant ce réglage n’a jamais été scientifiquement étudié auparavant. Nous avons montré qu’il s’agit d’une forte interaction fluide-structure tridimensionnelle où une importante dépression apparaît au bord d’attaque, qui augmente temporairement les efforts, ce qui n’est pas observé avec un réglage plus bordé. / A full-scale experimental study on an instrumented sailing yacht is conducted to better assess the aero-elastic behaviour of the sails and rigging in downwind navigations. The downwind sail shape is a non-developable surface with high curvature leading to massive flow separation. In addition, spinnakers are thin and flexible sails leading to a strongly coupled Fluid-Structure Interaction. Due to the non-respect of some rules of similitude, the unsteady behaviour of downwind sails cannot be easily investigated with wind tunnel tests that would need comparison with full-scale experiments. Moreover unsteady numerical simulations modelling the aero-elastic behaviour of the sails and rigging require validations. An inboard instrumentation system has been developed on a 8 meter J/80 sailboat to simultaneously and dynamically measure the flying shape of the spinnaker, the aerodynamic loads transmitted to the rigging, the pressure distribution on the sail as well as the boat and wind data. The shape of the spinnaker while sailing is acquired by a photogrammetric system developed during this PhD. The accuracy of this new system, better than 1.5%, is used to measure the global shape and the main dynamic deformations, such as the flapping of the luff. The aerodynamic load produced by the spinnaker is assessed by the measurements of the load magnitudes and directions on the three corners of the sail (head, tack and clew), and also by the pressure distribution on the spinnaker. The global behaviour of the spinnaker is analysed according to the apparent wind angle. A new representation using Bézier triangular surfaces defines the spinnaker 3D shape. A few control points enable to represent the sail and can easily characterise the type of sail. A typical unsteady behaviour of the spinnaker is also analysed. Letting the luff of the sail flap is known by sailors as the optimal trim but has never been scientifically studied before. It is found that it is a complex three dimensional fluid-structure interaction problem where a high suction near the leading edge occurs, producing a temporary increase of the force coefficient that would not be possible otherwise.

The hotel is located on Skatholmen in the archipelago of Stockholm, Värmdö county. The hotel building has an open structure characterized by hospitality and the nature outside. The rooms have stunning views of the island landscape and lush forest. With biodiversity and valuable nature in mind, the building has been designed with a structure that should not be too intrusive in the surrounding landscape. The building is meant to blend into the dark silhouette of the island and to give a light footprint on the topography of the landscape. The use of well-chosen materials and similar design, both in plan and facade, creates a consistent building despite the building's somewhat playful expression. The hotel rooms are arranged linearly along three shafts, which aim to maximize the exposure of sunlight throughout the day, as well as to create large open spaces. The design makes it possible for the hotel guests to choose what type of sunlight they prefer. The large glass area also functions as large mirrors and will make the building reflect the surrounding environment, which gives a less prominent appearance in the surrounding. / Hotellet ligger på Skatholmen i Stockholms mellanskärgård, Värmdö kommun. Hotell-byggnaden har en öppen struktur präglad av gästfrihet och naturen utanför. Hotellrummen har slående utsikt över ölandskapet och lummiga skogar. Med tanke på den biologiska mångfalden och värdefull natur har byggnaden utformats med en struktur som inte ska vara för påträngande på omgivande landskap. Byggnaden är tänkt att smälta in i den mörka siluetten av ön och ge ett lätt fotavtryck på topografin i landskapet. Den slutliga strukturen, främst mot vattnet, för tanken till en båt med en kommandobrygga. Trots byggnadens något lekfulla utformning skapas en helhet med hjälp av materialval och liknande formspråk, både i plan och fasad. Hotellrummen är ordnade och placerade linjärt längs med tre axlar, som syftar till att maximera exponeringen av solljus under hela dagen, samt att skapa stora öppna ytor. Utformningen gör att hotellgästen kan välja vilken typ av solljus hen föredrar. Stora glaspartier ramar in skärgården utanför. De stora glaspartierna fungerar även som stora speglar och gör att byggnaden reflekterar den omgivande miljön, vilket resulterar i att byggnaden, till synes, ger ett mindre markant avtryck på platsen.

When the famous African-American actor and singer Paul Robeson played the lead in Shakespeare's Othello in London in 1930, tickets were in high demand during the production's first week. The critical response, however, was less positive, although the reviews unanimously praised his bass-baritone delivery. When Robeson again played Othello on Broadway thirteen years later, critics praised not only his voice but also his acting, the drama running for 296 performances. My argument concerning Robeson uses elements first noted by Henri Lefebvre in his seminal work, The Production of Space, while I also draw on Paul Connerton's work on commemorative practices. Using spatial and memorial theories as a backdrop for examining his two portrayals, I suggest that Robeson's nascent geopolitical awareness following the 1930 production, combined with his already celebrated musical voice, allowed him to perform the role more dramatically in 1943.

The plot is 9 houses designed with different functions. The main function of the home storage vessels. Other additional functions are a café, gym, spa, garage, car, boat garage, offices, locker rooms and club athletes.Houses are made of glued trusses shaped house with a gable roof. The facade is composed of titanium zinc surface. The glass facade is just in front of a house. The houses are oriented differently. Shielding is provided by means of sliding shutters.

What would happen if the outskirts and endings of our towns receive the same affection as their cores? This diploma project will tend to one of these forgotten sites. The shoreline of Ekerö Centrum - A site longing for identity, to become more than it is today. The park by this shoreline, which unintentionally has become the back end of the town center, has the potential to be elevated into a key node for Ekerö. This project looks to the existing assets of the site - it’s water contact, the view over the fields and forests of Lovön and the connection to Stockholm City via commuter boat, and suggests three additions to the site to activate it and let people enjoy these elements. By looking closer at the site three different points spread out in the park was identified. These points each received an addition. The first - a waiting hall for the boat station. Second,a marketplace - which essentially is a piece of park furniture that can be used in multiple ways. And third - a sauna to experience the water.

The objective of this thesis is to generate and enhance technical specifications for mooring equipment designated for the Swedish Navy, as commissioned by the Swedish Defence Materiel Administration. The technical specifications will primarily emphasize the capacity to endure various load scenarios imposed by the Swedish Defence on the mooring equipment. This technical report constitutes a preliminary investigation in collecting technical requirements where the mechanical characteristics will be of focus. The investigation assessed the elasticity characteristics of mooring ropes, considering their dependence on length and loading rate. As the mooring ropes are exposed to large forces and environmental circumstances, this study focused on investigating the impact of a used and worn rope, with the conclusive finding that the worn rope exhibited a substantial decline in its strength characteristics.  The thesis work will examine the different load cases, encompassing both slow and shock loadings, with the result that Young's modulus does depend on the loading rate and that the magnitude of damping in the rope holds notable significance. The mooring goods must also endure extreme conditions without failing prematurely while still conforming to the performance requirements of the personnel handling the ropes. Therefore, a study is included regarding how much impact the weather conditions may have on the mooring ropes and which parameters are important. The thesis also outlines the importance of considering similar handling standards for new mooring goods, given the expectation of future procurement. It is crucial to avoid certain mistakes during handling, which can severely damage personnel and equipment. Therefore, it is necessary to ensure that the new mooring ropes meet the current handling standards to maintain safety and avoid costly accidents. This report emphasizes the significance of adhering to proper handling standards in procuring and deploying mooring goods for the Swedish marine. / Syftet med detta arbete är att utveckla samt förbättra de tekniska specifikationer som FMV idag besitter angående de tampar \& förtöjningsgods som är avsedda för den svenska flottan, på uppdrag av Försvarets Materielverk, FMV. Denna rapport är en förstudie för samlandet av tekniska krav där fokuset främst ligger på de mekaniska egenskaperna ur ett hållfasthetsmässigt perspektiv. Undersökningen bedömde elasticitetsegenskaperna hos förtöjningsrep med hänsyn till deras beroende av längd och belastningshastighet. Eftersom dessa förtöjningsrep utsätts av diverse stora krafter och miljöförhållanden så undersöktes även vilken påverkan detta har på repen. Detta undersöktes genom att jämföra ett nytt mot ett gammalt och slitet rep. Båda av samma modell och tillverkare. Denna jämförelse ledde till slutsatsen att det använda repet besatt en betydande nedgång i samtliga sina egenskaper ur ett förtöjningsperspektiv. Avhandlingen kommer undersöka repens, främst amfibiebataljonens, olika belastningssituationer, inklusive både långsamma och plötsliga belastningar för att utvärdera de olika lastfallen de kan tänkas utsättas för. Detta resulterade i att elasticitetsmodulen verkar ha ett beroende av lastningshastigheten och visar på viskoelastiska egenskaper samt att dämpningsfaktorn har en betydande storlek hos tampen. Förtöjningsutrustningen måste även klara en rad olika miljöförhållanden utan att plötsligt ge vika, samtidigt som de uppfyller prestandakraven hos besättningen. Därför följer även en utredning kring hur mycket väderförhållandena kan påverka repen samt vilka parametrar som är viktiga att ta hänsyn till. Rapporten syftar även till att betona vikten av standardisering för ny förtöjningsutrustning med tanke på eventuell framtida upphandling. Det kan vara avgörande att undvika misstag vid hantering, vilket kan resultera i skador på besättning och utrustning. Därför är det viktigt att se till att nya förtöjningsrep uppfyller och upprätthåller de aktuella standarder som finns.

This master thesis addresses the control of electric propulsion motors in a marine context. The focus lies mainly on the implementation of field oriented control (FOC) in a field programmable gate array (FPGA). The hypothesis is that FPGAs provide performance advantages over microcontroller-based control solutions by enabling parallel processing. Zparq AB, a startup specializing in electric marine propulsion, serves as the industry partner for this project. They develop sustainable alternatives to traditional fossil fuel powered propulsion, and the aim is to develop every included part of their electric propulsion systems inhouse. That makes the development of an FPGA-based motor control solution relevant to their goal. The research question focuses on how multiple marine propulsion motors can be controlled from a single FPGA. To answer this, the study investigates relevant engineering aspects such as reference frame transformations, motor control strategies, pulse width modulation (PWM) methods and technological aspects of modern FPGA architectures. For developing the motor controller, a Digilent Arty Z7-20 FPGA board is used. In the design process, all included functions are written as code in a hardware description language (HDL). This approach aims at maintaining complete insight in all details of the solution. Two variants of conventional FOC are developed; one with position feedback from an encoder and one sensorless. The developed motor controller is tested by controlling a brushless direct current (BLDC) motor, and the results prove the functionality of the encoder-based variant. They also show a latency of less than 15 microseconds and indicate the feasibility of the chosen approach. The modularity of the FPGA is demonstrated by successfully controlling two motors, using two copies of the developed solution in a single FPGA. A discussion on combining FPGA-based controllers with wide bandgap (WBG) semiconductors is also included, where the main discussed advantage is high switching frequency. In conclusion, the results and insights from the project contribute to future development of FPGA-based motor control solutions, both within Zparq and the research field. The insights regarding the specific chosen approach for the FPGA development can also be useful for similar projects. / Detta masterarbete behandlar styrning av elektriska motorer i ett marint kontext. Fokus ligger huvudsakligen på implementeringen av fältorienterad styrning (FOC) i en ifält-programmerbar grindmatris (FPGA). Hypotesen är att FPGAer erbjuder prestandafördelar jämfört med mikrokontroller-baserade styrlösningar, genom att möjliggöra parallella beräkningsprocesser. Zparq AB, ett startup som specialiserar sig på elektriska marina drivsystem, är industripartner för detta projekt. De utvecklar hållbara alternativ till traditionell fossildriven framdrift och målet är att på egen hand utveckla alla ingående delar i deras elektriska drivsystem. Det gör att utvecklingen av en FPGA-baserad lösning för motorstyrning är relevant inom ramen för deras mål. Forskningsfrågan fokuserar på hur ett flertal motorer för marin framdrift kan styras från en enda FPGA. För att svara på detta undersöks relevanta tekniska aspekter såsom koordinattransformationer, motorstyrningsstrategier, metoder för pulsbreddsmodulering (PWM) samt teknologiska aspekter av moderna FPGA-arkitekturer. För utvecklingen av motorstyrningen används ett Digilent Arty Z7-20 FPGA-kort. I designprocessen formuleras alla inkluderade funktioner som kod i ett hårdvarubeskrivande språk (HDL). Detta tillvägagångssätt syftar till att ha god insyn i hela lösningen, ner på detaljnivå. Två varianter av konventionell FOC utvecklas; en med positionsfeedback från vinkelgivare och en sensorlös. Den utvecklade motorstyrningen testas genom att driva en borstlös likströmsmotor (BLDC) och resultaten visar på den vinkelgivarbaserade variantens funktionalitet. De visar även att fördröjningen är under 15 mikrosekunder, samt på genomförbarheten av det valda tillvägagångssättet. Modulariteten i FPGAn demonstreras genom att framgångsrikt styra två motorer med hjälp av två kopior av den utvecklade lösningen i en och samma FPGA. En diskussion kring att kombinera FPGA-baserad styrning och halvledare med brett bandgap (WBG) är också inkluderad, där den huvudsakliga fördelen som diskuteras är hög switchfrekvens.svis bidrar resultaten och insikterna från projektet till framtida utveckling av FPGA-baserade lösningar för motorstyrning, både inom Zparq och övriga forskningsfältet. Insikterna från det specifika valda tillvägagångssättet för FPGA-utvecklingen kan även de vara användbara i liknande projekt.