Examensarbeten för masterexamen


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    The Fashion Industry and Textile Recycling: A Service Design Project from a Recycler’s Point of View
    (2023) Karlsson, Anna; Larsson, Jonas; Chalmers tekniska högskola / Institutionen för industri- och materialvetenskap; Chalmers University of Technology / Department of Industrial and Materials Science; Strömberg, Helena; Strömberg, Helena
    Fashion consumption is at an all time high, leading to a substantial negative environmental impact. Textile recycling is one of the solutions necessary for a more sustainable textile industry, but currently a very small share of textiles produced are recycled into new fabrics. The project initiator Stena Recycling has been working with waste management, recycling and sustainability for decades in a wide range of industries. The aim of this project was to explore the needs and sustainability processes of fashion companies and through that create a service concept that Stena Recycling could offer to become a partner to fashion companies, providing support through the entire product lifecycle. The project was conducted using service design methodology, focused on including stakeholders and users. This was achieved through an interview study, a market analysis, concept development, internal and external evaluations, and finalization of a service portfolio. To create a foundation for understanding fashion companies, company personas were created and their customer journey was mapped along with needs, objectives and goals for each section of the journey. The customer journey consists of five sections: Sustainability Goals, Design, Sales, Disposal and Circularity, of which Sustainability Goals and Circularity span across the entire journey. Further, gaps between producers and recyclers were identified, the main ones being knowledge and intermediaries. A service portfolio consisting of three concepts was developed to meet the needs and gaps identified. Stena Collect connects producers and recyclers through textile collection and logistics, making it easier for fashion companies to recycle textile waste. Stena Consulting helps fashion companies plan and execute sustainability work. Finally, Design for Recycling is a digital tool supporting fashion companies in creating garments that can be recycled.
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    Enabling Effective Data Collection for Industry 4.0: Technical Solution for Collecting and Transferring Shop Floor Data
    (2023) Andersson, Alexander; Lund, Carl; Chalmers tekniska högskola / Institutionen för industri- och materialvetenskap; Chalmers University of Technology / Department of Industrial and Materials Science; Despeisse, Mélanie; Chen, Xiaoxia
    The manufacturing industry is moving towards Industry 4.0, this requires that the right information is available to reach the full potential of the various Industry 4.0 technologies such as Digital Twin, Cloud computing, advanced analytics, Artificial Intelligence, Internet of Things, and Machine Learning. To obtain the right infor mation, a system for gathering and transferring data in real time is required. To be able to make this connection, Edge device is usually used. Edge devices are devices that can collect data in production. The purpose of this thesis is to find and evaluate suitable technical solutions to collect and transfer data. The work is carried out in three steps, identifying the data collection challenges, a literature study to find technical solutions, and evaluating technical solutions. The findings show that there are technical solutions on the market to collect and transfer the data that the case company request. Further research should ensure that the technical solutions work by doing tests in a lab environment or by trying to implement them on a workstation.
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    The Key to Boating for Everyone: Designing New Means of Accessing Marine Vessels
    (2023) Eriksson, Johan; Otterlind, Pia; Chalmers tekniska högskola / Institutionen för industri- och materialvetenskap; Chalmers University of Technology / Department of Industrial and Materials Science
    The point of interest of this project was to develop a new means of onboarding marine vessels. The thesis has been done in collaboration with Volvo Penta. The aim has been to evaluate how a vessel equipped with their propulsion and electronic vessel control system’s method of unlocking can be developed for the next generation of boating. Upon examining the marine market as well as neighboring markets it was discovered that connectivity and Internet of Things are fields which can elevate the experience of onboarding, therefore, the thesis sought to develop a new unlocking system that gave users an expanded access to their marine vessel. The design process of the project has been done by gathering insight from different stakeholders and potential users. After the user research was compiled, it was applied in a design process where concepts for a new system were ideated. The process resulted in a new proposed system for unlocking marine vessels. The new system includes both a digital interface and a new physical key fob. The two represented artefacts for front end interaction in the system and were designed based on usability theory. Further, they were developed in an iterative, human-based design process, where continuous evaluations with potential users were a key deciding factor
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    Quantifying production complexity in the assembly of industrial robots: Does everyday complexity affect the quality of your product?
    (2023) Maslekar, Arun; Le, Dat Trong Thanh; Chalmers tekniska högskola / Institutionen för industri- och materialvetenskap; Chalmers University of Technology / Department of Industrial and Materials Science; Stahre, Johan; Ninan Theradapuzha, Mathew
    With the advancements of Industry 4.0 being rapidly achieved, Industry 5.0 aims to create a sustainable and socially responsible industrial practice. The framework of Industry 5.0 centrally aims to integrate the human workforce with advanced digital technologies thereby striving for inclusive growth and societal acceptance. Understanding the current state of a production system helps relevant stakeholders to focus on key areas to improve and achieve a smooth integration between humans and digital tools. Complexity affects daily production activities in numerous ways. Understanding the causes of complexity helps in tackling the perceived problems of the workforce and finding deviations in production activities. This thesis project explores the ways to define and quantify complexity in a produc tion line using an objective and subjective method. The results show that out of the 6 assigned assembly lines for the study, 4 lines were concluded to be complex for the operators and from a general overview. The possibilities to manage complexity have also been discussed for application in a similar research environment in the future.
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    Design of an Auto-pointing System for a Geostationary Earth Orbit Application
    (2023) Jarnestål, Eric; Staf, Staffan; Chalmers tekniska högskola / Institutionen för industri- och materialvetenskap; Chalmers University of Technology / Department of Industrial and Materials Science; Isaksson, Ola; Brahma, Arindam
    This report documents a masters thesis in which a systematic product development process was applied to create an auto-pointing subsystem for a satellite internet user terminal. The current product of Satcube AB is a manually operated termi nal, hence the need for an automated alternative. The aim of the project was to explore the undiscovered solution space of minimally actuated, automated antenna pointers. The sub-system should only utilise two actuators for the antenna’s three axes of rotation requiring a state-of-the art design. Furthermore, to be inline with Satcubes product portfolio and the market trend, the product should be compact and light weight to ensure high portability. From conceptualisation to detailed design, an agile prototyping approach was imple mented with additions of rapid prototyping, mainly with 3D-printers, which proved to be important. The design process progressed in iterative cycles which provided rapidly produced prototypes at the end of each cycle, this made sure the project moved in the right direction. Since the surfaced challenges largely were related to complex mechanisms with several constituent parts, iterative development of the in dividual components provided results at a smaller scale, from which improvements could be made to the product as a whole. With the inclusion of rapid prototyping during the final design phase, quick design choices could be made and this ensured the best possible outcome. The thesis presents a detailed account of the process, which includes the challenges faced and solutions adopted. The resulting auto-pointer prototype confirms the hy pothesis and demonstrates the feasibility of the two actuator concept. The final prototype is able to rotate the azimuth, polarisation and elevation with only two actuators. It does this by utilising a clutch mechanism between azimuth and polar isation which disengages after the antenna has been elevated enabling the azimuth to be rotated individually. However, it is important to notice that since the purpose of the prototype was to prove the clutch as a concept, further development of the auto-pointer is needed for a final product to emerge. However, the prototype pro vides a reliable foundation for future work in this area. Overall, the thesis highlights the importance of a systematic product development approach in tackling complex engineering problems.