Dynamic Modeling and Control of Three-Degree-of-Freedom Electromagnetic Actuator for Image Stabilization

Heya, Akira; Hirata, Katsuhiro; Niguchi, Noboru

doi:10.1109/tmag.2018.2845438

Cited by 17 publications

(17 citation statements)

References 10 publications

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“…From the simulation characterization of the proposed 3-DOF spherical VCM, the movable angle of the Xand Y-axes is ±30 • and that of the Z-axis is 360 • . For the conventional 3-DOF spherical VCM proposed in [26], the movable angle of the Xand Y-axes is ±25 • and that of the Z-axis is ±5 • . Consequently, the proposed 3-DOF spherical VCM performs better than the conventional 3-DOF spherical VCM proposed in [26].…”

Section: Discussionmentioning

confidence: 99%

“…We observed the conventional 3-DOF spherical VCM proposed in [26] and found that in some situations, the magnetic field from the radially oriented ring magnet was small in some part of the coils and even changed direction. Therefore, unlike in the conventional structure, we modified the layout of the coils and separated the coils for rotation about the Xand Y-axes.…”

Section: Basic Structurementioning

confidence: 98%

“…Heya et al proposed another type of spherical VCM [25][26][27]. In their structure, the coil was considered one part of the stator and the magnet was considered one part of the rotor.…”

Section: Introductionmentioning

confidence: 99%

“…Section 3 introduces the parameter settings for simulation and results. Section 4 describes the simulation characterization of the proposed 3-DOF spherical VCM and presents a comparison of its performance with that of the conventional 3-DOF spherical VCM proposed in [26]. Finally, Section 5 concludes the study.…”

Section: Introductionmentioning

confidence: 99%

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Design and Simulation of Novel 3-DOF Spherical Voice Coil Motor

2021

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Multi-DOF motion is realized in the eyes and joints of robots mostly through the combination of multiple one-degree-of-freedom (1-DOF) motors. However, this results in reduced efficiency, a large volume, reduced response speed, and inaccurate positioning. To solve these problems, this study proposes a novel 3-DOF spherical voice coil motor (VCM). In this VCM, 16 coils and a radially oriented ring magnet are used to generate a Lorentz force to achieve motion. In particular, coils for Z-axis rotation are sandwiched between the coils for X- and Y-axis rotation. Furthermore, the proposed VCM can achieve 360° rotation about the Z-axis. The commercial software ANSYS was used to design and verify the performance of the proposed VCM. Simulation results indicate that this VCM affords improved power efficiency because only a suitable combination of coils, rather than all coils, needs to be powered on. The results demonstrate the feasibility of the proposed 3-DOF spherical VCM.

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Section: Discussionmentioning

confidence: 99%

Section: Basic Structurementioning

confidence: 98%

“…Heya et al proposed another type of spherical VCM [25][26][27]. In their structure, the coil was considered one part of the stator and the magnet was considered one part of the rotor.…”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Design and Simulation of Novel 3-DOF Spherical Voice Coil Motor

2021

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“…The torque characteristics have been investigated by a magnetic field analysis using a three-dimensional finite element method (3-D FEM) [22]. The dynamic modeling was proposed, and its validity was verified by the comparison with the dynamic analysis using 3-D FEM, and the control performance was verified only by the numerical calculation [23]. However, experimental verification has not been reported.…”

Section: Introductionmentioning

confidence: 99%

Experimental Verification of Three-Degree-of-Freedom Electromagnetic Actuator for Image Stabilization

Heya

Hirata

2020

Sensors

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Image deteriorations due to vibrations have become a problem in autonomous systems such as unmanned aerial vehicles, robots, and autonomous cars. To suppress the vibration, a camera stabilizer using a gimbal mechanism is widely used. However, the size and weight of the system increase because the conventional image stabilization systems require some actuators and links to drive in multi-axes. In order to solve these problems, we proposed a novel three-degree-of-freedom (3DOF) electromagnetic actuator for image stabilization. The actuator can be driven by only three-phase and has a simple structure and control system. This paper describes the experimental verification of the proposed actuator. The torque characteristics are clarified, and the analysis and measured torque characteristics are compared to verify the analysis validity. For verifying the dynamic performance, the frequency characteristics are measured. The effectiveness of the proposed magnetic structure and operating principle are investigated.

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