Open-Loop Control of Voice Coil Motor With Magnetic Restoring Force Using High-Low Frequency Composite Signals

Chang, Yu-Hao; Liu, Chien-Sheng; Chen, I‐Wei; Tsai, Meng-Shiun; Tseng, Hsiang-Chun

doi:10.1109/access.2019.2945882

Cited by 6 publications

(8 citation statements)

References 18 publications

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“…These actuators, such as voice coil motors (VCM), can produce relatively large force and displacement and are widely used for autofocus (AF) and optical image stabilization (OIS) in compact camera modules in modern consumer electronics (smartphones, tablets, etc.) 17 – 19 . However, the need for high-turn coils and magnets makes such actuators difficult to miniaturize and batch fabricate by micromachining.…”

Section: Introductionmentioning

confidence: 99%

Cellular shape micromachined actuator ribbons

et al. 2022

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This work presents a new class of micromachined electrostatic actuators capable of producing output force and displacement unprecedented for MEMS electrostatic actuators. The actuators feature submicron high aspect ratio transduction gaps lined up in two-dimensional arrays. Such an arrangement of microscale actuator cells allows the addition of force and displacements of a large number of cells (up to 7600 in one demonstrated array), leading to displacements ranging in the hundreds of microns and several gram forces of axial force. For 50 µm thick actuators with horizontal dimensions in the 1–4 millimeter range, an out-of-plane displacement of up to 678 µm at 46 V, a bending moment of up to 2.0 µNm, i.e., 0.08 N (~8 gram-force) of axial force over a 50 µm by 2 mm cross-sectional area of the actuator (800 kPa of electrostatically generated stress), and an energy density (mechanical work output per stroke per volume) up to 1.42 mJ/cm3 was demonstrated for the actuators.

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Section: Introductionmentioning

confidence: 99%

Cellular shape micromachined actuator ribbons

et al. 2022

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“…The rotor coil is a single-phase winding, which is supplied with direct current according to the demand, so the steering and output torque of the RVCA is determined by the direction and magnitude of the coil current. Because the moving parts are generally made of light materials such as aluminium alloy (instead of iron core), this kind of actuator has outstanding advantages such as small inertia, fast dynamic response, linearisation of torque and current, small volume and high precision [2][3][4].…”

Section: Introductionmentioning

confidence: 99%

Calculation, simulation and fast estimation of thermal resistance of rotary voice coil actuators

Chen

et al. 2022

IET Electric Power Appl

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Rotary voice coil actuator (RVCA) is mainly used for reciprocating drive of small inertia loads in a limited range of angle, which is widely used in aerospace and other fields. Thermal resistance is one of the most important parameters of RVCAs, which is directly related to the steady‐state temperature rising and operation reliability. Because the thermal resistance cannot be measured directly, the analytical method is usually used to calculate the thermal resistance of the RVCA. However, due to the particularity of the thermal circuit calculation, the calculation is complicated and the result is not accurate. It is not conducive for engineering applications of this kind of actuator. In this paper, a series of rotary voice coil motor is selected as the research object. Through analytical calculation and thermal simulation, a more accurate thermal resistance calculation correction model and thermal resistance value of RVCAs are obtained, and the accuracy of the estimation results is verified by experiments. On this basis, the effective volume of the coil frame of the RVCA is selected as the variable, and the concise variation law of the series thermal resistance data is obtained. This paper provides a fast and accurate estimation method for the thermal resistance of RVCA, which has an important reference value for expanding the engineering applications of RVCAs.

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“…A linear voice coil motor (VCM) is a direct drive and hysteresis-free device, which utilizes a magnetic field generated by a permanent magnet with a coil wire to produce an electric driving force [17,18]. is device has a compact structure, high acceleration, and no hysteresis features, so it has been extensively used in various small range positioning applications, such as servo valves [17], hard disk drives [19,20], automatic transmitters [21], autofocus actuators [22], and ultrasound scanners [23], which demand highprecision and high-speed control levels. However, effective controls for this device should be designed because external disturbances and operational changes instantly act on a direct drive system.…”

Section: Introductionmentioning

confidence: 99%

“…On the other hand, any change or disturbance in the payload will be directly reflected back to the VCM. Although many control methods have been proposed to control the single-axis VCM systems [17,18,[21][22][23][24], designing effective and robust control methods to meet highprecision requirements for the multi-axis VCM systems is still required. As a result, this study aims to develop a variable-order FFPID (VOFFPID) control strategy for controlling the mover position of a VCM-based dual-axis positioning stage with a high-precision contouring performance.…”

Section: Introductionmentioning

confidence: 99%

Nonlinear Contour Tracking of a Voice Coil Motors-Driven Dual-Axis Positioning Stage Using Fuzzy Fractional PID Control with Variable Orders

Chen

Yang²

2021

Mathematical Problems in Engineering

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This study aims to develop a variable-order fuzzy fractional proportional-integral-differential (VOFFPID) control system for controlling the mover position of a newly designed voice coil motors- (VCMs-) driven dual-axis positioning stage. First, the operation principle and dynamics of the stage are analyzed. After that, the design of a fuzzy fractional proportional-integral-differential (FFPID) control system is introduced on the basis of a fractional calculus and fuzzy logic system. With an additional degree of freedom to the control parameters and fuzzy operation, the FFPID control system can upgrade the contour tracking performance of a conventional proportional-integral-differential (PID) control system with respect to the specified dynamics of the stage. Moreover, the VOFFPID control system is designed to further improve the tracking responses of the FFPID control system. In this system, the five control parameters are optimized with the cuckoo search algorithm via an adaptive strategy. Lastly, nominal and payload conditions attributed to two nonlinear contour demands are provided to evaluate the contouring performance of the PID, FFPID, and VOFFPID control systems. The experimental results subjected to different performance measures demonstrate that the proposed VOFFPID controller outperforms PID and FFPID controllers in terms of the designed VCMs-driven dual-axis positioning stage under both conditions.

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Open-Loop Control of Voice Coil Motor With Magnetic Restoring Force Using High-Low Frequency Composite Signals

Cited by 6 publications

References 18 publications

Cellular shape micromachined actuator ribbons

Cellular shape micromachined actuator ribbons

Calculation, simulation and fast estimation of thermal resistance of rotary voice coil actuators

Nonlinear Contour Tracking of a Voice Coil Motors-Driven Dual-Axis Positioning Stage Using Fuzzy Fractional PID Control with Variable Orders

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