“Kinematic and Elastostatic Design Optimisation of the 3-DOF Gantry-Tau Parallel Kinematic Manipulator”

Authors: Ilya Tyapin and Geir Hovland,
Affiliation: University of Queensland and University of Agder
Reference: 2009, Vol 30, No 2, pp. 39-56.

Keywords: parallel manipulator, statics, design optimisation

Abstract: One of the main advantages of the Gantry-Tau machine is a large accessible workspace/footprint ratio compared to many other parallel machines. The Gantry-Tau improves this ration further by allowing a change of assembly mode without internal link collisions or collisions between the links and end-effector. The reconfigurable Gantry-Tau kinematic design obtained by multi-objective optimisation according to this paper gives the following features: 3-D workspace/footprint ratio is more than 3.19, lowest Cartesian stiffness in the workspace is 5N/mu and no link collisions detected. The optimisation parameters are the support frame lengths, the actuator positions and the robot´s arm lengths. The results comparison between the evolutionary complex search algorithm and gradient-based method used for the Gantry-Tau design in the past is also presented in this paper. The detailed statics model analysis of the Gantry-Tau based on a functionally dependency is presented in this paper for the first time. Both the statics model and complex search algorithm may be applied for other 3-DOF Hexapods without major changes. The existing lab prototype of the Gantry-Tau was assembled and completed at the University of Agder, Norway.

PDF PDF (2029 Kb)        DOI: 10.4173/mic.2009.2.1

DOI forward links to this article:
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  title={{Kinematic and Elastostatic Design Optimisation of the 3-DOF Gantry-Tau Parallel Kinematic Manipulator}},
  author={Tyapin, Ilya and Hovland, Geir},
  journal={Modeling, Identification and Control},
  publisher={Norwegian Society of Automatic Control}