Design, modelling and characterization of a 2-DOF precision positioning platform

Yanling Tian, Chunfeng Liu, Xianping Liu, Fujun Wang, Xiaochen Li, Yanding Qin, Dawei Zhang, Bijan Shirinzadeh

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13 Citations (Scopus)


This paper presents the mechanical design, parameter optimization and experimental tests of a 2-degree-of-freedom (DOF) flexure-based precision
positioning platform, which has great potential application in many scientific and engineering fields. During the mechanical design, the leaf parallelogram
structures provide the functions of joint mechanisms and transmission mechanisms with excellent decoupling properties. The dynamic model of the
developed positioning platform is established and analysed using pseudo rigid body model methodology. A particle swarm algorithm optimization
approach is utilized to perform the parameter optimization and thus improve the static and dynamic characteristics of the positioning platform. The prototype of the developed 2-DOF positioning platform has been fabricated using a wire electric discharge machining technique. A number of experimental
tests have been conducted to investigate the performance of the platform and verify the established models and optimization methodologies. The experimental results show that the platform has a workspace range in excess of 8.038.0 mm with a stiffness of 4.97 N/mm and first-order natural frequency of 231 Hz. The cross-axis coupling ratio is less than 0.6%, verifying the excellent decoupling performance.
Original languageEnglish
Pages (from-to)396 - 405
Number of pages10
JournalTransactions of the Institute of Measurement and Control
Issue number3
Publication statusPublished - 2015

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