Results 11 to 20 of about 327,560 (267)
Vibration control with thin-film-coil actuator for head-positioning system in hard disk drives
Journal of Advanced Mechanical Design, Systems, and Manufacturing, 2015 In a head-positioning system of hard disk drives, various mechanical resonances may degrade performance or stability of the control system. In these mechanical resonances, a torsional mode of a head-stack assembly (HSA), in which a resonant frequency is ...
Takenori ATSUMI +3 more
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Journal of Advanced Mechanical Design, Systems, and Manufacturing, 2018 In this paper, we present a robust controller design method for a magnetic-head positioning system in a hard disk drive (HDD) based on the H∞ control theory and the Robust Controller Bode (RCBode) plot.
Jun ITO, Takenori ATSUMI
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Flying-height and tracking-position controls with thermal-positioning actuator in hard disk drives
Journal of Advanced Mechanical Design, Systems, and Manufacturing, 2017 To improve positioning accuracy of a magnetic head in hard disk drives (HDDs), a triple-stage-actuator system was developed with a thermal-positioning actuator for a magnetic-head-positioning system.
Takenori ATSUMI
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Head-Positioning Control Using Virtual Resonant Modes in a Hard Disk Drive
Journal of Advanced Mechanical Design, Systems, and Manufacturing, 2007 In conventional control systems in hard disk drives, it is difficult to compensate for disturbances above the primary mechanical resonance. In this paper, a design method that uses a virtual resonant mode in head-positioning systems of hard disk drives ...
Takenori ATSUMI
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Relative positioning control of flexible structure for precise positioning stage
Mechanical Engineering Journal, 2020 Precise positioning technologies are widely used in industrial machines such as device manufacturing equipment. Many studies have been done on feedback control systems for precise positioning stages that improve accuracy by using sensor signal feedback ...
Hironori OGAWA +2 more
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Frontiers in Plant ScienceAs a vital component of the desert ecological protection system, the edge-locked forests of the Kubuqi Desert play a crucial role in mitigating wind erosion, stabilizing sand, maintaining soil and water, and restricting desert expansion.
Xue Chen +8 more
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MachinesThe robotic arm is a critical component of modern industrial manufacturing. However, its positioning performance can be hindered by overshooting and oscillation.
Yuyang Zhang +9 more
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Synchronization Control of Dynamic Positioning Ships Using Model Predictive Control
Journal of Marine Science and Engineering, 2021 Underway replenishment is essential for ships performing long-term missions at sea, which can be formulated into the problem of leader-tracking configuration. Not only the position and orientation but also the velocities are required to be controlled for
Cheng Liu, Ting Sun, Qizhi Hu
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Distributed control of positive systems [PDF]
IEEE Conference on Decision and Control and European Control Conference, 2011 A system is called positive if the set of non-negative states is left invariant by the dynamics. Stability analysis and controller optimization are greatly simplified for such systems. For example, linear Lyapunov functions and storage functions can be used instead of quadratic ones.
openaire +3 more sources
Ship Dynamic Positioning Control Based on Active Disturbance Rejection Control
Journal of Marine Science and Engineering, 2022 Nowadays, Dynamic Positioning (DP) is applied to various tasks such as subsea pipeline laying and the requirements for the positioning performance in marine operations are higher and higher.
Hongliang Li +5 more
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