The occurrence of singular configurations in parallel mechanisms must be avoided during motion since the actuators cannot control motion even in the neighborhood of these configurations. As a consequence, the knowledge of the singular configurations of the mechanism is important for control purposes, for singularity-free path planning, and also represents basic information for the synthesis of a desired mechanism workspace free from singularities. In this paper the mobility analysis of the 3-UPU parallel mechanism assembled for obtaining a pure translation motion of the output platform is performed and both translation and rotation singularity loci are presented in analytic form and their geometric interpretation is given.
Mobility Analysis of the 3-UPU Parallel Mechanism Assembled for a Pure Translational Motion
Contributed by the Mechanisms Committee for publication in the JOURNAL OF MECHANICAL DESIGN. Manuscript received February 2000. Associate Editor: G. S. Chirikjian.
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Di Gregorio, R., and Parenti-Castelli, V. (May 16, 2002). "Mobility Analysis of the 3-UPU Parallel Mechanism Assembled for a Pure Translational Motion ." ASME. J. Mech. Des. June 2002; 124(2): 259–264. https://doi.org/10.1115/1.1471530
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