Zero defect manufacturing based on thermal-related phenomena simulations

• Κύριος συγγραφέας: Μότση, Κατερίνα
• Άλλοι συγγραφείς: Μουρτζής, Δημήτριος
• Μορφή: Thesis
• Γλώσσα: English
• Έκδοση: 2019
• Θέματα: Zero defect; Thermal expansion; Digital twin; Reduced order models; Θερμική παραμόρφωση; Ψηφιακό δίδυμο; Θερμικές κατεργασίες; 620.004 5

The quality of a product is depended on both resources and materials of production. Thus, failures and defects are expected to happen. In this work, the focus will be on defects in measurements due to processing side-effects. This study presents a complete analysis revolving around the near zero-defect manufacturing at thermal-related phenomena. Zero-defect techniques are considered within the manufacturing system to increase the quality metrics values of the process and reach near zero-defect quality of products. In particular, this work concerns modeling of the thermal expansion after the grinding process of bearings and the adaption of the model with measurements. The purpose is also to solve the model in near real time. This will allow adaptive control of the process and corrective actions, as the computation time for the model will be reduced. A particular method, reduced order modeling aims to lower the computational complexity of problems in simulations of large-scale dynamical systems and control systems. This reduced-order model can then be evaluated with acceptable accuracy and much less time. This reduced-order model (ROM) can then be evaluated with acceptable accuracy and a significantly less time.