Institute of Machine Tools and ManufacturingOpen OpportunitiesGears are the backbone of the aircraft transmission systems, facilitating critical power transfer and speed adjustments for various components. Their flawless operation is the key to the seamless flight of lightning-fast fighter jets, commercial airliners, and agile helicopters.
As the demand for precise, robust, and dependable gears continues to rise, addressing production bottlenecks becomes increasingly crucial in meeting aviation's evolving needs. A significant contributor to these bottlenecks is the grinding operation, the final step in production. In the pursuit of achieving higher production efficiency by pushing the limits of process parameters, grinding burns often appear on the workpiece surface. These grinding burns are undesirable. They occur due to excess heat accumulation which impacts residual stresses and metallurgical structures, potentially leading to component cracks and failures. The rejection of such workpieces wastes time and resources, ultimately diminishing production efficiency.
The primary focus of this thesis is the early detection of grinding burns within the manufacturing process, achieved through the utilization of acoustic emission and current sensors in combination with critical process parameters. A mathematical model will be developed based on machine learning modeling techniques combining the sensors data, process parameters and evaluated surface quality. The objectives are prediction of grinding burn, and subsequently, optimization of the grinding process for higher productivity. - Interdisciplinary Engineering, Mechanical and Industrial Engineering, Statistics
- Master Thesis, Semester Project
| Walking has been proven to create the best sense of presence while exploring
virtual environments. However, walking in virtual environments comes with the
constraint that the virtual and the physical space must have the same
dimensions. This limitation restricts the size of the virtual spaces. Various techniques have been developed to overcome this issue, such as RDW and impossible spaces. Although significant progress has been made with these methods, exploring large virtual environments can still lead the user to reach the boundaries of the physical space. Therefore, a safety mechanism is needed to prevent the user from colliding with the walls. The most popular safety mechanism is having resets, which are messages displayed to the user asking them to stop and perform a certain action that turns them away from the wall before continuing the exploration. However, resets reduce immersion and thus should be avoided as much as possible. - Computer-Human Interaction
- Bachelor Thesis, ETH Zurich (ETHZ), Semester Project
| see attachment - Engineering and Technology
- Other specific labels
| The process forces during machining with abrasives is critical for efficiency of the process and quality of the final product. The forces arise from different mechanisms like sliding, plowing and cutting. Although material removal occurs mostly by chip formation, a considerable portion of grinding energy goes to sliding between workpiece and dulled abrasive particles. This project aims to create a sliding force model to accurately predict forces with changing contact conditions in an abrasive process simulation. - Manufacturing Engineering, Mechanical Engineering
- Bachelor Thesis, Semester Project
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