Trends in USV research will continue on the path toward a fully autonomous USV capable of troop transport or enemy engagement. Imaging sonar will be an integral part of this development. However, due in part to sonar's inherent physical limitations, as well as its sensitivity to environmental factors, sonar technology represents a bottleneck to the development of situationally aware USVs capable of high-speed maneuvers. The work presented in this thesis is intended to provide a platform to bridge this gap, which is the design, analysis, and field testing of a mount for an imaging sonar intended as a retrofit for an existing vessel. The result of this work represents a step toward the ultimate goal of a fully autonomous USV, and will enable the advancement of research in the use of imaging sonar on surface vehicles. This thesis examines the problem of mounting a sonar on a surface vehicle from a fundamental perspective. It describes the development of a list of customer needs, presents a prototype design, and presents the important analyses for the prototype. The prototype mount was built, and field testing for proof of concept was carried out on the Virginia Tech USV, which is a Rigid Hull Inflatable Boat (RHIB), and the Navy Special Operations Craft - Riverine (SOC-R) on the Pearl River at Stennis Space Center. Testing showed the mount to be highly effective at limiting risk to personnel and equipment while operating in difficult environments like swamps. However, it also exposed some limitations associated with the mount's breakaway device, and the mounting location at the side in 2012, and at the stern in 2013. Based on experience gained from testing, a new mount design is presented for use at the bow. The bow location offers better impact protection to the sonar as long as the sonar can be positioned above the boat's draft. Field tests also exposed the need for an omnidirectional breakaway device which limits impact loads on the sonar during collisions. The Ball and Socket Breakaway (BSB) device was designed to satisfy this need. The BSB is acts as a "mechanical fuse," which holds the sonar rigidly under normal operating conditions, but will slip and rotate when the sonar strikes an object. It is designed to respond to impact loads on the sonar from the front, sides, or back, resulting in improved sonar protection during the varied maneuvers necessary for operation in shallow, narrow passageways. The expected moment holding capacity of the BSB as it is currently designed is 300 N-m (2650 lb-in), which should allow for speeds up to 3 m/s (6 kt) before drag-induced breakaway. / Master of Science

This report presents a thesis work on advanced level in the course PPU502 – Product development. The thesis work has investigated the outcome of applying the Product Development Process in the development of a production system, through a case study at Munters Europe AB. The case study aimed to examine, map, analyze and develop a manufacturing process that currently consists of manual and time consuming operations. The purpose of this thesis was to investigate the versatility of the knowledge obtained during the MSc program Innovation and Product Design, as a result of the markets expectations of engineering graduates to be generalists with good ability to apply their skills in more than one area. The methodological approach in this thesis is based on the research process that Kothari (2004) presents and are modified in to 4 phases. Phase 1 defines the project and establishes research questions that are used as guidelines for the work. Phase 2 includes the case study, where the Product Development Process was implemented in the development a manufacturing process. Phase 3 consists of data collection, where quality assuring and general methods for developing production systems were identified. Phase 4 compares the empirical results from the case study with the collected data, describes differences of the methods and analyzes the outcome. / Denna rapport presenterar ett examensarbete på avancerad i kursen PPU502 – Produktutveckling. Examensarbetet har undersökt utfallet av att tillämpa produktutvecklingsmetoder vid utveckling av ett produktionssystem, genom en fallstudie vid Munters Europe AB. Fallstudien syftade till att granska, kartlägga, analysera och utveckla en tillverkningsprocess som, i dagsläget, består av en del manuella operationer. Syftet med examensarbetet var att undersöka mångsidigheten av den erhållna kunskap från civilingenjörsutbildningen Innovation och Produktdesign då marknaden förväntar sig att civilingenjörer ska vara generalister med god förmåga att tillämpa sin kompetens på fler än ett område. Metodiken i detta arbete grundar sig i forskningsprocessen som Kothari (2004) presenterar och är modifierad till 4 faser. Fas 1 definierar projektet och upprättar frågeställningar som sedan styr arbetet. Fas 2 innehåller fallstudien, där produktutvecklingsprocessen har följts för att utveckla en tillverkningsprocess. Fas 3 består av datainsamling där kvalitetssäkra, allmänna metoder för utveckling av produktionssystem har identifierats. Fas 4 jämför empirin från fallstudien med de insamlade data och redogör skillnader samt analyserar utfallet.

By enhancing a real scene with computer generated objects, Augmented Reality (AR), has proven itself as a valuable Human-Computer Interface (HCI) in numerous application areas such as medical, military, entertainment and manufacturing. It enables higher performance of on-site tasks with seamless presentation of up-to-date, task-related information to the users during the operation. AR has potentials in design because the current interface provided by Computer-aided Design (CAD) packages is less intuitive and reports show that the presence of physical objects help design thinking and communication. This research explores the use of AR to improve the efficiency of a design process, specifically in mechanical design. / Singapore-MIT Alliance (SMA)

Este trabalho apresenta um estudo de caso na indústria de implementos e veículos rodoviários para solução do processo específico de movimentação de veículos e carrocerias rodoviárias nas linhas de montagem. A solução é o desenvolvimento do projeto de uma ferramenta pneumática para atender os parâmetros identificados no processo de movimentação utilizando uma metodologia de projeto. A metodologia adotada é uma composição de modelos sugeridos por autores mostrando uma sequência clara e objetiva do ciclo de vida do projeto, estruturada em quatro fases principais: Projeto Informacional, Projeto Conceitual, Projeto Executivo e Otimização de Projeto. A identificação das informações relevantes ao processo de movimentação dos produtos deu início ao Projeto Informacional. Com a finalidade de conhecer melhor as características dos processos dos potenciais usuários da ferramenta, foram levantadas as características e os parâmetros do processo. Os parâmetros abordam as principais grandezas envolvidas no sistema e suas limitações. Os dados resultantes do levantamento foram analisados gerando uma síntese de todos os parâmetros identificados para o desenvolvimento das próximas fases. No projeto conceitual, houve a evolução da solução através do detalhamento de um conceito, escolhido mediante a proposição de alternativas durante a geração de conceitos. O detalhamento é apresentado através de desenhos, segundo a diretriz de projeto orientado ao computador, com base na estrutura funcional de funcionamento da ferramenta, salientando os principais sistemas e suas configurações. Os dimensionamentos são apresentados no projeto executivo e contemplam dois tipos de análise: a análise cinemática e a análise estrutural do sistema. Na análise cinemática são apresentadas duas propostas de configuração para o motor pneumático que será utilizado na ferramenta. As propostas são expostas através de desenhos de montagem, desenhos explodidos e gráficos dos parâmetros do motor pneumático para cada uma das configurações adotadas. Nesta fase também é mostrada a construção do protótipo. Os resultados do projeto são obtidos através da realização de teste em bancada e em campo para confirmação dos parâmetros estabelecidos. Completando o ciclo de vida do projeto, propõem-se as tendências evolutivas, analisando as possíveis melhorias para a ferramenta. As conclusões do trabalho são baseadas nos resultados apresentados nos testes realizados com a ferramenta, na eficiência da metodologia adotada para o desenvolvimento do projeto e na análise do cumprimento dos objetivos definidos no trabalho. / This paper presents a case study in industry of road road vehicles for solution of the specific handling of road vehicles and truck trailers in assembly lines. The solution is to develop the design of a pneumatic tool to meet the criteria identified in the move process using a design methodology. The methodology used is a composite of models suggested by the authors showed a clear sequence and objective of the life cycle of the project, divided into four main phases: Informational Design, Conceptual Design, Executive Design and Optimization Project. The identification of information relevant to the process of transferring products initiated the Informational Design. In order to better understand the nature of the processes of potential users of the tool has been raised the characteristics and process parameters. The parameters to approach the main quantities involved in the system and its limitations. Data from the survey were analyzed by generating a synthesis of all parameters identified for the development of the next phases. In conceptual design, was the evolution of the solution through the details of a concept, chosen by proposing alternatives for the generation of concepts. The detail is presented through drawings, according to the guideline of design aided computer based functional structure operating the tool, highlighting the major systems and their configurations. The detail is presented in the executive project and includes two types of analysis: kinematic analysis and structural analysis of the system. In the kinematic analysis are presented two proposals for setting for the air motor to be used in the tool. The proposals are exposed through the assembly drawings, exploded drawings and graphics of the parameters of the air motor for each of the configurations adopted. This stage is also shown a prototype. The project results are obtained by performing test bench and field tests to confirm the established parameters. Completing the life cycle of the project, propose to the changing trends, and review possible improvements to the tool. The conclusions of the study are based on the results presented in the tests with the tool, the efficiency of the methodology used to develop the design and analysis of compliance with the defined objectives at work.

Este trabalho apresenta um estudo de caso na indústria de implementos e veículos rodoviários para solução do processo específico de movimentação de veículos e carrocerias rodoviárias nas linhas de montagem. A solução é o desenvolvimento do projeto de uma ferramenta pneumática para atender os parâmetros identificados no processo de movimentação utilizando uma metodologia de projeto. A metodologia adotada é uma composição de modelos sugeridos por autores mostrando uma sequência clara e objetiva do ciclo de vida do projeto, estruturada em quatro fases principais: Projeto Informacional, Projeto Conceitual, Projeto Executivo e Otimização de Projeto. A identificação das informações relevantes ao processo de movimentação dos produtos deu início ao Projeto Informacional. Com a finalidade de conhecer melhor as características dos processos dos potenciais usuários da ferramenta, foram levantadas as características e os parâmetros do processo. Os parâmetros abordam as principais grandezas envolvidas no sistema e suas limitações. Os dados resultantes do levantamento foram analisados gerando uma síntese de todos os parâmetros identificados para o desenvolvimento das próximas fases. No projeto conceitual, houve a evolução da solução através do detalhamento de um conceito, escolhido mediante a proposição de alternativas durante a geração de conceitos. O detalhamento é apresentado através de desenhos, segundo a diretriz de projeto orientado ao computador, com base na estrutura funcional de funcionamento da ferramenta, salientando os principais sistemas e suas configurações. Os dimensionamentos são apresentados no projeto executivo e contemplam dois tipos de análise: a análise cinemática e a análise estrutural do sistema. Na análise cinemática são apresentadas duas propostas de configuração para o motor pneumático que será utilizado na ferramenta. As propostas são expostas através de desenhos de montagem, desenhos explodidos e gráficos dos parâmetros do motor pneumático para cada uma das configurações adotadas. Nesta fase também é mostrada a construção do protótipo. Os resultados do projeto são obtidos através da realização de teste em bancada e em campo para confirmação dos parâmetros estabelecidos. Completando o ciclo de vida do projeto, propõem-se as tendências evolutivas, analisando as possíveis melhorias para a ferramenta. As conclusões do trabalho são baseadas nos resultados apresentados nos testes realizados com a ferramenta, na eficiência da metodologia adotada para o desenvolvimento do projeto e na análise do cumprimento dos objetivos definidos no trabalho. / This paper presents a case study in industry of road road vehicles for solution of the specific handling of road vehicles and truck trailers in assembly lines. The solution is to develop the design of a pneumatic tool to meet the criteria identified in the move process using a design methodology. The methodology used is a composite of models suggested by the authors showed a clear sequence and objective of the life cycle of the project, divided into four main phases: Informational Design, Conceptual Design, Executive Design and Optimization Project. The identification of information relevant to the process of transferring products initiated the Informational Design. In order to better understand the nature of the processes of potential users of the tool has been raised the characteristics and process parameters. The parameters to approach the main quantities involved in the system and its limitations. Data from the survey were analyzed by generating a synthesis of all parameters identified for the development of the next phases. In conceptual design, was the evolution of the solution through the details of a concept, chosen by proposing alternatives for the generation of concepts. The detail is presented through drawings, according to the guideline of design aided computer based functional structure operating the tool, highlighting the major systems and their configurations. The detail is presented in the executive project and includes two types of analysis: kinematic analysis and structural analysis of the system. In the kinematic analysis are presented two proposals for setting for the air motor to be used in the tool. The proposals are exposed through the assembly drawings, exploded drawings and graphics of the parameters of the air motor for each of the configurations adopted. This stage is also shown a prototype. The project results are obtained by performing test bench and field tests to confirm the established parameters. Completing the life cycle of the project, propose to the changing trends, and review possible improvements to the tool. The conclusions of the study are based on the results presented in the tests with the tool, the efficiency of the methodology used to develop the design and analysis of compliance with the defined objectives at work.

Este trabalho apresenta um estudo de caso na indústria de implementos e veículos rodoviários para solução do processo específico de movimentação de veículos e carrocerias rodoviárias nas linhas de montagem. A solução é o desenvolvimento do projeto de uma ferramenta pneumática para atender os parâmetros identificados no processo de movimentação utilizando uma metodologia de projeto. A metodologia adotada é uma composição de modelos sugeridos por autores mostrando uma sequência clara e objetiva do ciclo de vida do projeto, estruturada em quatro fases principais: Projeto Informacional, Projeto Conceitual, Projeto Executivo e Otimização de Projeto. A identificação das informações relevantes ao processo de movimentação dos produtos deu início ao Projeto Informacional. Com a finalidade de conhecer melhor as características dos processos dos potenciais usuários da ferramenta, foram levantadas as características e os parâmetros do processo. Os parâmetros abordam as principais grandezas envolvidas no sistema e suas limitações. Os dados resultantes do levantamento foram analisados gerando uma síntese de todos os parâmetros identificados para o desenvolvimento das próximas fases. No projeto conceitual, houve a evolução da solução através do detalhamento de um conceito, escolhido mediante a proposição de alternativas durante a geração de conceitos. O detalhamento é apresentado através de desenhos, segundo a diretriz de projeto orientado ao computador, com base na estrutura funcional de funcionamento da ferramenta, salientando os principais sistemas e suas configurações. Os dimensionamentos são apresentados no projeto executivo e contemplam dois tipos de análise: a análise cinemática e a análise estrutural do sistema. Na análise cinemática são apresentadas duas propostas de configuração para o motor pneumático que será utilizado na ferramenta. As propostas são expostas através de desenhos de montagem, desenhos explodidos e gráficos dos parâmetros do motor pneumático para cada uma das configurações adotadas. Nesta fase também é mostrada a construção do protótipo. Os resultados do projeto são obtidos através da realização de teste em bancada e em campo para confirmação dos parâmetros estabelecidos. Completando o ciclo de vida do projeto, propõem-se as tendências evolutivas, analisando as possíveis melhorias para a ferramenta. As conclusões do trabalho são baseadas nos resultados apresentados nos testes realizados com a ferramenta, na eficiência da metodologia adotada para o desenvolvimento do projeto e na análise do cumprimento dos objetivos definidos no trabalho. / This paper presents a case study in industry of road road vehicles for solution of the specific handling of road vehicles and truck trailers in assembly lines. The solution is to develop the design of a pneumatic tool to meet the criteria identified in the move process using a design methodology. The methodology used is a composite of models suggested by the authors showed a clear sequence and objective of the life cycle of the project, divided into four main phases: Informational Design, Conceptual Design, Executive Design and Optimization Project. The identification of information relevant to the process of transferring products initiated the Informational Design. In order to better understand the nature of the processes of potential users of the tool has been raised the characteristics and process parameters. The parameters to approach the main quantities involved in the system and its limitations. Data from the survey were analyzed by generating a synthesis of all parameters identified for the development of the next phases. In conceptual design, was the evolution of the solution through the details of a concept, chosen by proposing alternatives for the generation of concepts. The detail is presented through drawings, according to the guideline of design aided computer based functional structure operating the tool, highlighting the major systems and their configurations. The detail is presented in the executive project and includes two types of analysis: kinematic analysis and structural analysis of the system. In the kinematic analysis are presented two proposals for setting for the air motor to be used in the tool. The proposals are exposed through the assembly drawings, exploded drawings and graphics of the parameters of the air motor for each of the configurations adopted. This stage is also shown a prototype. The project results are obtained by performing test bench and field tests to confirm the established parameters. Completing the life cycle of the project, propose to the changing trends, and review possible improvements to the tool. The conclusions of the study are based on the results presented in the tests with the tool, the efficiency of the methodology used to develop the design and analysis of compliance with the defined objectives at work.

Orientadores: Kátia Lucchesi Cavalca Dedini, Luiz Otávio Saraiva Ferreira / Dissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Engenharia Mecânica / Made available in DSpace on 2018-08-17T15:03:09Z (GMT). No. of bitstreams: 1 Mendes_RicardoUgliara_M.pdf: 2835811 bytes, checksum: c8cae753b116c3893246e25fb64fdf4c (MD5) Previous issue date: 2011 / Resumo: Máquinas rotativas apresentam um vasto campo de aplicação como aeronaves, fábricas, laboratórios e usinas de energia. Estas aplicações contêm eixos girando a altas velocidades que devem ter alto nível de confiabilidade. Assim, a análise do comportamento dinâmico destas bombas e turbinas é necessária para estabelecer padrões de funcionamento do equipamento. Ultimamente, com projetos feitos com auxílio de computador, modelos de elementos finitos de eixos incluindo mancais, discos, selos e acoplamentos têm sido desenvolvidos. Através destes modelos, o comportamento das máquinas pode ser previsto, permitindo projetos otimizados baseados nos cálculos de velocidades críticas e simulações de instabilidades do filme de óleo. Estas informações fornecem a base para o desenvolvimento de controladores para reduzir vibrações durante a partida de máquinas, assim como aceleração ou desaceleração através das velocidades críticas, ou ainda para controlar instabilidades do filme de óleo. Uma das técnicas aplicadas na identificação de parâmetros de máquinas e estruturas é a análise modal, a qual consiste em aplicar uma força de perturbação no sistema e, então, medir sua resposta. Entretanto, há uma dificuldade que traz limitações à excitação de sistemas com eixos rotativos, quando utilizando martelos de impacto ou shakers, uma vez que, devido ao atrito, forças tangenciais e ruídos indesejados podem ser aplicados ao sistema. Portanto, o estudo de uma técnica de excitação externa sem contato se torna de grande interesse. Neste sentido, o presente trabalho trata do estudo e desenvolvimento de um modelo em elementos finitos de máquinas rotativas integrado ao modelo de um atuador magnético como fonte de excitação externa, focando na resposta do modelo e sua interação com o atuador. Também é apresentada uma comparação entre simulações numéricas e testes práticos obtidos de uma bancada experimental / Abstract: Rotating machines have a wide range of application such as airplanes, factories, laboratories and power plants. These applications contain shafts rotating at high speeds that must have high trust levels. Thus, the dynamic behavior analysis of these pumps and turbines is required to establish operational patterns of the equipment. Lately, with computer aid design, shafts finite element models including bearings, discs, seals and couplings have been developed. Through these models the machines behavior can be predicted, allowing optimized design based on the critical speeds calculus and oil instabilities simulations. These informations provide the basis for controller development in order to reduce vibrations during the machines start-up and acceleration or deceleration through the critical speeds, or even to control oil instabilities. One of the technique es applied in parameters identification of machines and structures is the modalanalysis, which con sists of applying a perturbation force into the system and then to measure its response. However, there is a difficulty that brings limitations to the excitation of systems with rotating shafts when using impact hammers or shakers, due to friction, undesired tangential forces and noise that can be applied to the system. Therefore, the study of a non-contact technique of external excitation becomes of high interest. In this sense, the present work deals with the study and development of a finite element model for rotating machines using a magnetic actuator as source of external excitation, focusing on the model response and its interaction with the actuator. It is also presented a comparison between the numerical simulations and practical tests obtained from a rotor test rig / Mestrado / Mecanica dos Sólidos e Projeto Mecanico / Mestre em Engenharia Mecânica

Abstract: This thesis work was a part of Halmstad University’s Mechanical Masterprogramme curriculum done in favour of ABB Alingsås. Our industrial partnerproduces and manufactures low voltage electrical distribution cabinets, connectorsand switch gears. This project is focused on specific electrical connector used inABB’s trademark cabinets. These electrical connectors serve as both the input and output points for thedistribution cabinets. The product under scope is an extension connector calledADI3M which is used in conjunction with the large sized cable connectors(AD300). This is a sequential design optimization activity performed after theredesigning of the AD300 to ensure interface compatibility and also aimed atopportunistic cost reduction. The ADI3M should provide design compatibility withboth old and new AD300 connector designs along with the comfortable interfacinginside the CDC and SDC cabinets. With the design process and concepting knowledge gained from the course work inHalmstad university along with the ABB’s industrial exposure towards the powersupply networks we proposed four different design concepts. These design conceptswere then evaluated against interface compatibility, cost aspects, manufacturingreadiness, mechanical strength, heat generation and electricity conductionproperties. Among the product development techniques, we applied QFD processto generate the concepts, waterfall method to frame the engineering design processflow and morphological matrix to select the generated concepts. We then changedthe raw material from brass to aluminium and extrusion process due to its beneficialproperties compared to brass and copper with various other reasons explainedclearly in the thesis content. For the plastic cover we preferred poly-carbonate dueto requirements such as transparency, stiffness, etc. Two of the best feasibleconcepts were selected and the design proposals were prototyped using 3D printingtechnology. The 3D printing method used was fused deposition modelling (FDM).Later machined aluminium prototypes were then produced for the metalsubcomponents to do real time strength analysis and interface checks. Weperformed a theoretical product strength analysis using ANSYS19.2. Then resultswere then evaluated, and the final concept was chosen according to the factors suchas cost impact, easy installation and comfortable inter-component clearance.Finally, the prototypes were tested for IP rating fulfilment and compatible interfaceswith adjacent components. The consecutive activities to be done out of thesis scope is to conduct mechanicaland tests and record the performance. The future scope of this project is to developa hybrid design combining the AD300 and ADI3M connectors which would enableeasy product handling, simplified functionality and further reduce cost.

Through the use of generalized spherical harmonic basis functions a spectral representation is used to model the microstructure of cubic materials. This model is then used to predict the macroscopic elastic and plastic properties of materials with cubic crystal symmetry and various sample symmetry including triclinic and axial—symmetric. Building on the work of citeN{Barnett-FractureMechanics} the influence that anisotropy has on the fatigue response of the material is also modeled. This is accomplished through using the effective elastic stiffness tensor in the computation of crack extension force G. The resulting material model and macroscopic property calculations are the foundation for a software package which provides an interface to the microstructure. The Microstructure Sensitive Design interface (MDSi) enables interaction with the material design process and provides tools needed to incorporate material parameters with traditional design, optimization, and analysis software. Therefore the microstructure model can be optimized concurrently with a geometric model to further increase the overall design space. The software is then be used to explore how changes in the microstructure affect the performance of a turbine disc. The additional design space afforded by inclusion of the material parameters show that the total mass of the disk can be lowered by 9.5%. Additionally when the same geometry and loading conditions are considered and only the texture of the material is modified G is reduced be more than an order of magnitude.

No description available.