Settling Control with Reference Redesign for Dual Actuator Hard Disk Drive Systems

Ding, Jiagen; Wu, Chaozhong; Tomizuka, Masayoshi

doi:10.1016/s1474-6670(17)34025-9

Cited by 5 publications

(2 citation statements)

References 13 publications

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“…The evaluation indexes of the stability performance, namely, the gain margin, phase margin, and the maximum gain of the sensitivity function S dual ( z ) are listed in Table . The stability margin should be the gain margin ≥6 dB, the phase margin ≥40°, and the maximum gain of S dual ( z ) ≤ 10 dB .…”

Section: Verification Of Proposed Afcmentioning

confidence: 99%

AFC with gain adjustment in control system in HDDs for compensation of speaker‐induced vibration

Yabui

Atsumi

Inoue

2020

IEEJ Transactions Elec Engng

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In recent years, hard disk drives (HDDs) have been primarily used in data servers. At the data servers, the head positioning accuracy of control systems is influenced by various external vibrations. The deterioration of the positioning accuracy causes degradation of the digital data transfer rate in the data server. To compensate for the external vibrations in the head positioning systems of HDDs, in this research, the authors developed an adaptive feedforward control (AFC) with a gain learning function. The proposed AFC can update the characteristics of the control system to compensate for the external vibrations in real‐time. This paper reports on the results of experiments in which the proposed AFC is employed to compensate for the speaker‐induced vibration due to buzzing of the data server, implemented to act as notification for any issues occurring in the system. It was noted that the proposed AFC can compensate for the vibrations caused by the buzzing. Moreover, the control parameters updated in real‐time can be used to sense the occurrence of buzzing in the system. © 2020 Institute of Electrical Engineers of Japan. Published by John Wiley & Sons, Inc.

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Section: Verification Of Proposed Afcmentioning

confidence: 99%

AFC with gain adjustment in control system in HDDs for compensation of speaker‐induced vibration

Yabui

Atsumi

Inoue

2020

IEEJ Transactions Elec Engng

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“…Based on an H1 loop shaping synthesis procedure, Gouatarbes et al (2007) designed a robust controller for a travelling wave ultrasonic motor (TWUM) operated under extreme environmental conditions such as strong vibrations. To achieve the smooth landing and minimal residual vibration as the recording head approaches the target track, Ding et al (2004)developed a settling controller of a recording head for hard disk drives using a PZT transducer. The fine actuator path is designed by loop shaping for superior performance of the overall system.…”

Section: Introductionmentioning

confidence: 99%

Active multimodal vibration suppression of a flexible structure with piezoceramic sensor and actuator by using loop shaping

Sethi

Franchek

Song

2011

Journal of Vibration and Control

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This paper represents active multimodal vibration control of a flexible beam structure with piezoceramic (PZT) actuators and sensors using the loop shaping method. With surface-bonded PZT patch actuators and sensors, the flexible beam has both sensing and actuating capacities. Due to its flat auto spectrum in the specified frequency range, the Schroeder wave is used as an excitation signal for the non-parametric identification of the flexible beam structure. The identified open loop model is then used for the closed loop design by using the loop shaping method based on the extended sensitivity charts. A loop shaping compensator is designed to achieve multimodal vibration suppression. Numerical results showed a reduction of 8 decibels for the first mode and 12–14 decibels for the second and third modes. Experimental results closely match the simulation results. Furthermore, the results of loop shaping method are compared with those of the methods of linear quadratic regulator and pole-placement control, which are designed based on state space models via the parametric identification of the flexible beam. Comparisons show that the loop shaping method is easier to design since a parametric identification is not required and requires less control effort while maintaining the effectiveness in vibration suppression.

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Motion Control for wafer stage of 0.1μm lithography

Zhou

Shi

2007

2007 IEEE International Conference on Integration Technology

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In this paper, a particular mechanical servo system is presented based on the design requirement of scanning wafer stage of 0.1μm lithography. In order to achieve high accuracy and high speed, linear motor and voice coil motor is employed to control long stroke motions and short stroke motions, respectively. Considering extraneous forces resident in the system, a composite movement model with disturbing compensation employing an open-closed-loop D-type Iterative Learning Controller(ILC) is then given. The results of actual application demonstrate that the given system with better robustness can enhance the real-time tracing ability and can satisfy high accuracy at high speed along specified trajectories.

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Settling Control with Reference Redesign for Dual Actuator Hard Disk Drive Systems

Cited by 5 publications

References 13 publications

AFC with gain adjustment in control system in HDDs for compensation of speaker‐induced vibration

AFC with gain adjustment in control system in HDDs for compensation of speaker‐induced vibration

Active multimodal vibration suppression of a flexible structure with piezoceramic sensor and actuator by using loop shaping

Motion Control for wafer stage of 0.1μm lithography

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Settling Control with Reference Redesign for Dual Actuator Hard Disk Drive Systems

Cited by 5 publications

References 13 publications

AFC with gain adjustment in control system in HDDs for compensation of speaker‐induced vibration

AFC with gain adjustment in control system in HDDs for compensation of speaker‐induced vibration

Active multimodal vibration suppression of a flexible structure with piezoceramic sensor and actuator by using loop shaping

Motion Control for wafer stage of 0.1&#x003BC;m lithography

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Product

Resources

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Motion Control for wafer stage of 0.1μm lithography