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Micromachines 2018, 9(11), 578; https://doi.org/10.3390/mi9110578

Research on a 3-DOF Motion Device Based on the Flexible Mechanism Driven by the Piezoelectric Actuators

Tianjin Key Laboratory for Advanced Mechatronic System Design and Intelligent Control, Tianjin University of Technology, Tianjin 300384, China
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Received: 5 September 2018 / Revised: 25 October 2018 / Accepted: 29 October 2018 / Published: 6 November 2018
(This article belongs to the Section A:Physics)

Abstract

This paper describes the innovative design of a three-dimensional (3D) motion device based on a flexible mechanism, which is used primarily to produce accurate and fast micro-displacement. For example, the rapid contact and separation of the tool and the workpiece are realized by the operation of the 3D motion device in the machining process. This paper mainly concerns the device performance. A theoretical model for the static performance of the device was established using the matrix-based compliance modeling (MCM) method, and the static characteristics of the device were numerically simulated by finite element analysis (FEA). The Lagrangian principle and the finite element analysis method for device dynamics are used for prediction to obtain the natural frequency of the device. Under no-load conditions, the dynamic response performance and linear motion performance of the three directions were tested and analyzed with different input signals, and three sets of vibration trajectories were obtained. Finally, the scratching experiment was carried out. The detection of the workpiece reveals a pronounced periodic texture on the surface, which verifies that the vibration device can generate an ideal 3D vibration trajectory. View Full-Text
Keywords: flexible mechanism; three degrees of freedom; matrix-based compliance modeling; piezoelectric actuator flexible mechanism; three degrees of freedom; matrix-based compliance modeling; piezoelectric actuator
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).

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Lv, B.; Wang, G.; Li, B.; Zhou, H.; Hu, Y. Research on a 3-DOF Motion Device Based on the Flexible Mechanism Driven by the Piezoelectric Actuators. Micromachines 2018, 9, 578.

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