Francesco Morfea
Design and Implementation of 3-RRR Spherical Parallel Robot with Three Coaxial Actuators.
Rel. Stefano Paolo Pastorelli. Politecnico di Torino, Corso di laurea magistrale in Ingegneria Meccanica, 2019
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Abstract
This work, entitled "Design and Implementation of 3-RRR Spherical Parallel Robot with Three Coaxial Actuators" has had the scope to analytically study the kinematics (both inverse and forward one), the workspace and the singularities of a coaxial configuration of a spherical manipulator. The complete 3D design of the robot has been realised, building it thanks to a 3D printing process called FDM Technology (fused deposition modelling). Moreover, it has been modeled a Feed-Forward Position Control, by an external closed-loop in which the motor has been considered as a black-box. In this way, motors have showed less tracking error to follow the cubic position timing law, in Matlab environment.
As for the state of the art, this thesis has distanced itself from the literature before, not using a Denavith-Hartenberg's formulation or a loop equation process, in order to describe the kinematics, but investigating on new method, that could be more efficient in a computational terms, and exploiting its peculiar characteristics and functioning
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