Results 31 to 40 of about 1,659,328 (166)

Development of a High-Pressure Pneumatic On/Off Valve with High Transient Performances Direct-Driven by Voice Coil Motor

Applied Sciences, 2018
The high-speed pneumatic on/off valve is one of the critical components in pneumatic systems, which has been widely investigated in the last decades. In this research, a new voice coil motor direct drive high-speed pneumatic on/off valve (VCM-DHPV) is ...
Songlin Nie, Xiangyang Liu, Fanglong Yin, Hui Ji, Jingxiu Zhang   +4 more
doaj   +1 more source

Analysis and Optimal Design of a Novel Actuator System for a Camera Module

IEEE Access, 2021
Owing to the fourth industrial revolution and the recent trend for compact, high-performance, and multifunctional electrical devices, the demand for a small and high-performance camera module has dramatically increased.
Tae-Hoon Kwon, Jong-Suk Ro
doaj   +1 more source

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, Kenji SUZUKI, Shigeo NAKAMURA, Mutsuro OHTA   +3 more
doaj   +1 more source

Macro-motion structure optimization and experimental study of coaxial integrated macro-micro composite actuator

Journal of Advanced Mechanical Design, Systems, and Manufacturing, 2023
Aiming at the contradiction between large stroke and high precision characteristics of precision positioning table, a coaxial integrated macro-micro composite actuators (MMCA) with large stroke and high precision characteristics is proposed by combining ...
Caofeng YU, Gan WU, Zhihao XIAO, Xuefeng TAO   +3 more
doaj   +1 more source

Robust Current Control of Voice Coil Motor in Tip-Tilt Mirror Based on Disturbance Observer Framework

IEEE Access, 2021
In this paper, a control methodology based on the disturbance observer (DOB) framework is proposed to improve the current dynamic characteristic and the robustness of the voice coil motor (VCM) in the tip-tilt mirror.
Zongqi Ning, Yao Mao, Yongmei Huang, Chunming Gao   +3 more
doaj   +1 more source

Parametric Simulations on Leakage and Performance of a Miniature Free-Piston Generator (MFPG)

Applied Sciences, 2021
The miniaturization of electrical equipment and popularization of portable devices is an appealing motivation for the development of small-scale heat engines. However, the in-cylinder charge leaks severely as the engine dimension shrinks. The free-piston
Saifei Zhang, Chunhua Zhang, Yong Liu, Wei Wu, Han Wu, Shihua Yuan   +5 more
doaj   +1 more source

Finite Element Analysis and Experimental Test of A High Efficiency Voice Coil Motor with Halbach Array Permanent Magnets

, 2014
This paper studies an efficient voice coil motor (VCM) in which permanent magnets (PMs) with Halbach array are mounted on the surface of its mover. This arrangement has the advantages of improving the force constant of the VCM significantly compared with
Qu, Wentai, Zhao, Jing, Zhao, J, Zhang, Chi, Zhang, Jie   +4 more
core   +1 more source

Adaptive Feedforward Control Based on Estimated Electromagnetic Parameters upon a Novel Two-Degrees-of-Freedom Actuator with a Unibody Magnetic Circuit

Energies
This paper focuses on the study of the tracking performance of a novel two-degrees-of-freedom (two-DOF) voice coil motor (VCM). Intelligent control algorithms estimate the motor control model by the relationship between the input and output values, and ...
Zhaoxi Yi, Meizhu Luo, Ji-an Duan, Yan Jiang   +3 more
doaj   +1 more source

Thickness minimized magnetic circuit for rotary-type voice coil motor

, 2005
As the demand for small-form-factor disk drives for mobile devices increases, the miniaturization of voice coil motor (VCM) actuators playing important roles in track seeking and track following is an issue.
Yoon, HK, Jeong, JH, Lee, JH, Gweon, Dae-Gab   +3 more
core   +1 more source

Mechanisms of Minimum Skew Angle Actuation for Hard Disk Drives

MATEC Web of Conferences, 2016
The utilization of voice coil motor (VCM) rotary actuator in hard disk drives (HDDs) results in skew angles between the read/write head and disk rotation direction.
He Zhimin, Mou Jianqiang, Chan Kheong Sann   +2 more
doaj   +1 more source