Analytical Investigation on Torque of Three-Degree-of-Freedom Electromagnetic Actuator for Image Stabilization

Liu, Chien-Sheng; Lin, Yi‐Hsuan; Yeh, Chun-Chieh

doi:10.3390/app11156872

Cited by 5 publications

(2 citation statements)

References 26 publications

(58 reference statements)

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“…Electromagnetic actuators may have a compact size, however, they are difficult to scale up, have high energy consumption, and produce heat [ 3 ]. The application of several electromagnetic actuators and motors for multi-DOF systems increases structural complexity, and the control of such systems becomes more complicated [ 5 , 6 ]. Therefore, new precise motion devices must be developed to overcome the aforementioned drawbacks.…”

Section: Introductionmentioning

confidence: 99%

Ring-Shaped Piezoelectric 5-DOF Robot for Angular-Planar Motion

et al. 2022

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This paper provides numerical and experimental investigations of a ring-shaped piezoelectric 5-DOF robot that performs planar and angular motions of spherical payload. The robot consists of a piezoelectric ring glued on a special stainless-steel ring with three spikes oriented in the radial direction of the ring. The spherical payload is placed on top of the piezoelectric ring and is moved or rotated when a particular excitation regime is used. An alumina oxide ball is glued at the end of each spike of the steel ring and is used as contacting element. The spikes are used to transfer vibrations of the piezoelectric ring to contacting elements and to induce the planar motion of the payload. Additionally, three alumina oxide balls are glued on the top surface of the piezoelectric ring and are used to generate rotational motion of the spherical payload by impacting it. Finally, the top electrode of the piezoceramic ring is divided into six equal sections and is used to control the direction of angular and planar motion of the payload. Numerical modeling of the robot showed that vibration modes suitable for angular and planar motions are obtained at a frequency of 28.25 kHz and 41.86 kHz, respectively. Experimental investigation showed that the maximum angular velocity of the payload is 30.12 RPM while the maximum linear motion of the robot is 29.34 mm/s when an excitation voltage of 200 Vp-p was applied and a payload of 25.1 g was used.

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Section: Introductionmentioning

confidence: 99%

Ring-Shaped Piezoelectric 5-DOF Robot for Angular-Planar Motion

et al. 2022

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“…Moreover, the synchronization of several actuators is a challenging control task that requires expensive and complex control electronics and software. In addition, synchronization and control of the system consisting of several actuators decrease the accuracy and reliability of positioning systems [7,8]. Therefore, multi-DOF actuators must be used to simplify control of multi-degree of freedom positioning systems and to reduce the size and complexity of the mechatronic systems.…”

Section: Introductionmentioning

confidence: 99%

Development of 5-DOF Piezoelectric Actuator for Planar—Angular Positioning

2022

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A novel five degrees of freedom (5-DOF) piezoelectric actuator is proposed and analyzed in this paper. The actuator can provide unlimited self-motion in the plane and angular positioning of the spherical payload. The actuator is composed of a cylindrical bronze frame and a piezo ceramic ring glued on top of the cylinder. The cylinder has three cut-outs used to form three supports. The top electrode of the piezo ceramic ring is divided into six equal sections. Three electrodes are used to control the direction of the planar motion, while the remaining three electrodes allow controlling angular motion. The planar motion of the actuator is induced by employing radial vibrations of the supports, while the rotational motion of the sphere is obtained when radial vibrations of the corresponding sections of the piezo ceramic ring are excited. The proposed design of the actuator allows reducing coupling between vibrations of the different segments and ensures the possibility to obtain 5-DOF motion. The piezoelectric actuator is excited using a single harmonic signal switched between electrodes via a digitally controlled switch box. The numerical and experimental studies of the actuator were performed, and the operating principle was validated. The maximum linear velocity of 19.8 mm/s and angular speed of 31.3 RPM were obtained when the payload of 55.68 g and excitation voltage of 200 Vp-p was applied.

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