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Improvement and Validation of a Spring-Based Pelvis Module for the Lokomat Exoskeleton: Control, Sensors, and Human-Robot Interaction.
Rel. Alessandro Rizzo. Politecnico di Torino, Master of science program in Mechatronic Engineering, 2023
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Abstract
The main objective of this thesis was to improve the interaction between the exoskeleton and the human.   Initially, the Lokomat system did not provide a rigid connection at the pelvis, as it was only connected to the user's legs. This resulted in a lack of synchronization between the exoskeleton user's pelvic movements and the exoskeleton's pelvis plate movements, leading to delays and incongruence.  To address this issue, the focus of the study was to enhance the connection between the user's pelvis and the Lokomat system, enabling rigid and synchronized interaction. The integration of a new design aimed to enhance the system's ability to accurately track and replicate the user's movements without any noticeable delays.  This required a careful assessment of the existing system and the identification of areas for improvement.  The initial phase of my research involved designing and implementing the new connection mechanism, which focused on optimizing the coupling between the robot and the user's body.  The new design incorporated elements such as the C-shaped structure, which provided enhanced stability and improved alignment between the user and the Lokomat.
To ensure the effectiveness of the design, testing, and validation of the integrated sensors were conducted
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