- Published 2010 in 2010 International Conference on Computer…

This paper proposed a new method, i.e., Z-plane, for the property identification of the position-singularity loci of the 6/6-SPS Stewart manipulators. After constructing the Jacobian matrix of the 6/6-SPS Stewart manipulator, a cubic polynomial expression in the mobile platform position parameters, which represents the constant-orientation position-singularity locus of the manipulator, is derived. Graphical representations of the position-singularity locus of the parallel manipulator for different orientations are illustrated with examples to demonstrate the theoretical results. In order to analyze the property of position-singularity loci of the 6/6-SPS Stewart manipulator in three-dimensional space, a novel method called Z-plane is proposed. Based on the above-mentioned analytical expression, a quadratic expression that represents the position-singularity locus of the manipulator in Z-plane is derived, and further the property of position-singularity loci of the manipulator in parallel Z-planes is identified in detailed. It is shown that position-singularity loci of 6/6-SPS Stewart manipulators in parallel Z-planes are all quadratic expressions including infinite hyperbolas, four pairs of intersecting lines and a parabola.

@article{Hu2010NoticeOR,
title={Notice of Retraction

A new method for the property identification of the position-singularity loci of the Stewart parallel manipulator}, author={Shaogang Hu and Yi Cao and Hui Zhou and Baokun Li}, journal={2010 International Conference on Computer Application and System Modeling (ICCASM 2010)}, year={2010}, volume={3}, pages={V3-151-V3-155} }

A new method for the property identification of the position-singularity loci of the Stewart parallel manipulator}, author={Shaogang Hu and Yi Cao and Hui Zhou and Baokun Li}, journal={2010 International Conference on Computer Application and System Modeling (ICCASM 2010)}, year={2010}, volume={3}, pages={V3-151-V3-155} }