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Published in: Arabian Journal for Science and Engineering 7/2022

10-01-2022 | Research Article-Mechanical Engineering

An Interval Discretization Method for Workspace Determination of Parallel Mechanisms

Authors: Pengda Ye, Jingjing You, Fengfeng Xi, Jieyu Wang, Yu Ru

Published in: Arabian Journal for Science and Engineering | Issue 7/2022

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Abstract

An interval discretization method (IDM) is proposed for the workspace determination of parallel mechanisms to address the fundamental problems of unreliable prediction and missing-points existing in the traditional point discretization method (PDM). The IDM involves two parts: the workspace prediction using interval analytical forward kinematics (AFK) and the workspace correction using interval analytical inverse kinematics (AIK). Three typical parallel mechanisms are adopted as illustrative examples, i.e., the planar four-bar mechanism, the spatial 9–3 and 12–6 parallel mechanisms. Firstly, the AFK and AIK of the mechanisms are derived and extended into interval-valued form. Then, the position and orientation workspaces are predicted and corrected in sequence. Finally, numerical behaviors of the proposed and traditional methods are compared. The numerical simulations in Matlab show that: (i) IDM is about 5.34 times faster than PDM; (ii) IDM is about 45.50 times more accurate than PDM; (iii) IDM is about 1.01 times more stable than PDM; and (iv) IDM can realize the prediction of position and orientation workspaces and has no missing-points, thereby demonstrating the effectiveness of the proposed method.

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Literature
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go back to reference You, J.J.; Zuo, F.Y.; Yan, F.; Wang, J.; Wang, L.J.; Yan, P.F.: In-parallel platform and solution method of forward kinematics. China. Patent CN106142051A You, J.J.; Zuo, F.Y.; Yan, F.; Wang, J.; Wang, L.J.; Yan, P.F.: In-parallel platform and solution method of forward kinematics. China. Patent CN106142051A
Metadata
Title
An Interval Discretization Method for Workspace Determination of Parallel Mechanisms
Authors
Pengda Ye
Jingjing You
Fengfeng Xi
Jieyu Wang
Yu Ru
Publication date
10-01-2022
Publisher
Springer Berlin Heidelberg
Published in
Arabian Journal for Science and Engineering / Issue 7/2022
Print ISSN: 2193-567X
Electronic ISSN: 2191-4281
DOI
https://doi.org/10.1007/s13369-021-06310-2

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