Stroke Oriented Controller Design for Dual-stage Actuator of Head Positioning Control System in Hard Disk Drives

Yabui, Shota; Atsumi, Takenori; Inoue, Tsuyoshi

doi:10.1016/j.ifacol.2019.11.737

Cited by 3 publications

(3 citation statements)

References 6 publications

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“…For example, macromotion is generated by a coarse stage consisting of leadscrews or ball screws, micromotion is usually actuated by the piezoelectric actuator, the voice coil motor, or the microelectromechanical systembased actuator, which can compensate for positioning errors resulting from the coarse stage. Yabui et al proposed a dual-stage actuator of head positioning control system in hard disk drives, [29] which was composed of a voice coil motor for macromotion and a piezo actuator for micromotion. Kwon et al proposed a coarse/fine dual-stage manipulator, [30] which achieved the 200 Â 100 mm macromotion with large stroke characteristic based on the servomotor and the 100 Â 100 μm micromotion with nano-scale resolution characteristic based on the piezoelectric actuation platform.…”

Section: Cross-scale Piezoelectric Actuation 21 Cross-scale Character...mentioning

confidence: 99%

Review on Multiple‐Degree‐of‐Freedom Cross‐Scale Piezoelectric Actuation Technology

Chang,

Chen,

Zhang

et al. 2024

Advanced Intelligent Systems

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Piezoelectric actuation technology has been widely used in various precise‐oriented fields. Its notable advantages include high resolution, rapid response speed, output force with high density, and immunity to electromagnetic interference. Characteristics of cross‐scale and multiple‐degree‐of‐freedom (multi‐DOF) output motions are of utmost importance in the context of micro‐/nanopositioning technology. For decades, researchers have been working to develop various piezoelectric devices that exploit these important properties. In this review, a comprehensive review of recent research efforts in the field of cross‐scale multi‐DOF piezoelectric drive technology is provided. To commence, it provides an in‐depth exploration of the unique advantages associated with piezoelectric actuation, demonstrating them through comparative analyses with alternative actuation methods. Subsequently, the complexity of piezoelectric cross‐scale motion is introduced, and the multi‐DOF piezoelectric motion is classified in detail. Furthermore, the practical applications of multi‐DOF cross‐scale piezoelectric actuation technology are systematically elucidated, highlighting its versatility and suitability in real‐world environments. Finally, an in‐depth discussion that addresses the challenges encountered in the field is provided, and the prospective directions for further developments in piezoelectric actuation technology are outlined. This scholarly contribution plays an important role in guiding future research and innovative initiatives.

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Section: Cross-scale Piezoelectric Actuation 21 Cross-scale Character...mentioning

confidence: 99%

Review on Multiple‐Degree‐of‐Freedom Cross‐Scale Piezoelectric Actuation Technology

Chang,

Chen,

Zhang

et al. 2024

Advanced Intelligent Systems

View full text Add to dashboard Cite

show abstract

“…The stroke requirement of the micro-actuator is then increased to suppress low-frequency vibration (Ding et al, 2018), which is critical for overcoming the stroke limitation of the micro-actuator. The authors have reported on the controller design method and the stroke limitations of milli-actuators in a previous study (Yabui et al, 2019a; Yabui et al, 2019b).…”

Section: Introductionmentioning

confidence: 99%

High-bandwidth controller design for dual-stage actuator system in hard disk drives

Yabui

Atsumi

2022

Journal of Vibration and Control

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Large-capacity hard disk drives are important for the development of an information society. The capacities of hard disk drives depend on the positioning accuracy of magnetic heads, which read and write digital data, in disk-positioning control systems. Therefore, it is necessary to improve positioning accuracy to develop hard disk drives with large capacities. Hard disk drives employ dual-stage actuator systems to accurately control the magnetic heads. A dual-stage actuator system consists of a voice coil motor and micro-actuator. In micro-actuators, there is a trade-off between head-positioning accuracy and stroke limitation. In particular, in a conventional controller design, the micro-actuator is required to actuate such that it compensates for low-frequency vibration. To overcome this trade-off, this study proposes a high-bandwidth controller design for the micro-actuator in a dual-stage actuator system. The proposed method can reduce the required stroke of the micro-actuator by increasing the gain of the feedback controller of the voice coil motor at low frequencies. Although the voice coil motor control loop becomes unstable, the micro-actuator stabilizes the entire feedback loop at high frequencies. As a result, the control system improves the positioning accuracy compared to that achieved by conventional control methods, and the required micro-actuator stroke is reduced.

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“…Since 2000, the dual-stage actuator system has been widely implemented in HDDs [28], [29]. In a previous study [30], [31], we proposed a controller design method to increase the performance of the dual-stage actuator. Although the control bandwidth of the control system is approximately 4 kHz, it cannot cover the frequency range of acoustic vibrations.…”

mentioning

confidence: 99%

Servo Controller Design for Triple-Stage Actuator in HDD to Compensate for High-Frequency Fan Vibration

2022

Self Cite

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Stroke Oriented Controller Design for Dual-stage Actuator of Head Positioning Control System in Hard Disk Drives

Cited by 3 publications

References 6 publications

Review on Multiple‐Degree‐of‐Freedom Cross‐Scale Piezoelectric Actuation Technology

Review on Multiple‐Degree‐of‐Freedom Cross‐Scale Piezoelectric Actuation Technology

High-bandwidth controller design for dual-stage actuator system in hard disk drives

Servo Controller Design for Triple-Stage Actuator in HDD to Compensate for High-Frequency Fan Vibration

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