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Vibration Control of a Planar Parallel Manipulator Using Piezoelectric Actuators

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Abstract

This paper presents an active damping control approach applied to piezoelectric actuators attached to flexible linkages of a planar parallel manipulator for the purpose of attenuation of unwanted mechanical vibrations. Lightweight linkages of parallel manipulators deform under high acceleration and deceleration, inducing unwanted vibration of linkages. Such vibration must be damped quickly to reduce settling time of the manipulator platform position and orientation. An integrated control system for a parallel manipulator is proposed to achieve precise path tracking of the platform while damping the undesirable manipulator linkage vibration. The proposed control system consists of a PD feedback control scheme for rigid body motion of the platform, and a linear velocity feedback control scheme applied to piezoelectric actuators to damp unwanted linkage vibrations. In this paper, we apply the proposed vibration suppression algorithm to two different types of piezoelectric actuators and evaluate their respective performances. The two piezoelectric actuators are (i) a PVDF layer applied to the flexible linkage and (ii) PZT actuator segments also applied to the linkage. Simulation results show that both piezoelectric actuators achieve good performance in vibration attenuation of the planar parallel manipulator. The dynamics of the planar parallel platform are selected such that the linkages have considerable flexibility, to better exhibit the effects of the vibration damping control system proposed.

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Authors and Affiliations

  1. Department of Mechanical Engineering, Hannam University, Ojung-dong 133, Daejeon City, Korea, 306-791

    Bongsoo Kang & James K. Mills

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  1. Bongsoo Kang
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  2. James K. Mills
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Correspondence to Bongsoo Kang.

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Kang, B., Mills, J.K. Vibration Control of a Planar Parallel Manipulator Using Piezoelectric Actuators. J Intell Robot Syst 42, 51–70 (2005). https://doi.org/10.1007/s10846-004-3028-1

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  • DOI: https://doi.org/10.1007/s10846-004-3028-1

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