Presentado al 2nd International Workshop on: "Fundamental Issues and Future Research Directions for Parallel Mechanisms and Manipulators" celebrado en Montpellier (Francia) del 21 al 22 de septiembre de 2008. ; The direct position analysis (DPA) of a manipulator is the computation of the end-effector poses (positions and orientations) compatible with assigned values of the actuated-joint variables. Assigning the actuated-joint variables corresponds to considering the actuated joints locked, which makes the manipulator a structure. The solutions of the DPA of a manipulator one-to-one correspond to the assembly modes of the structure that is generated by locking the actuated-joint variables of that manipulator. Determining the assembly modes of a structure means solving the DPA of a large family of manipulators since the same structure can be generated from different manipulators. This paper provides an algorithm that determines all the assembly modes of two structures with the same topology which are generated from two families of mechanisms: one planar and the other spherical. The topology of these structures is constituted of nine links (one quaternary link, four ternary links and four binary links) connected through twelve revolute pairs to form four closed loops. ; This work has been partially supported by the Spanish Ministry of Education and Science, under the I+D project DPI2007-60858, by the I3P program with a short stay grant, and by funds of the Italian MIUR. ; Peer reviewed


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    Title :

    Direct Position Analysis of a Large Family of Spherical and Planar Parallel Manipulators with Four Loops


    Contributors:

    Publication date :

    2008-09-01


    Type of media :

    Conference paper


    Type of material :

    Electronic Resource


    Language :

    English


    Classification :

    DDC:    629



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