Results 31 to 40 of about 764 (161)

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

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

Generalizing Negative Imaginary Systems Theory to Include Free Body Dynamics: Control of Highly Resonant Structures with Free Body Motion [PDF]

, 2013
Negative imaginary (NI) systems play an important role in the robust control of highly resonant flexible structures. In this paper, a generalized NI system framework is presented.
Kallapur, A. G., Lanzon, A., Mabrok, M. A., Petersen, I. R.   +3 more
core   +1 more source

A novel voice coil motor-driven compliant micropositioning stage based on flexure mechanism [PDF]

, 2015
This paper presents a 2-degrees of freedom flexure-based micropositioning stage with a flexible decoupling mechanism. The stage is composed of an upper planar stage and four vertical support links to improve the out-of-plane stiffness.
Cai, Kunhai, Li, Zheng, Shang, Jiangkun, Tian, Yanling, Wang, Fujun   +4 more
core   +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

Design and Optimization of a Large-Air-Gap Voice Coil Motor with Enhanced Thermal Management for Magnetic Levitation Vibration Isolation in a Vacuum

Actuators
This study presents the design, optimization, and experimental validation of a large-air-gap voice coil motor (LAG-VCM) for high-precision magnetic levitation vibration isolation in vacuum environments.
Junren Mu, He Zhang
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

Design of a novel 5-DOF flexure-based compound alignment stage for Roll-to-Roll Printed Electronics [PDF]

, 2017
Alignment stage is a pivotal component for Roll-to-Roll Printed Electronic (R2RPE), especially for Roll-to-Roll inkjet printing. This paper presents the design, modeling, and testing of a new flexure based compound alignment stage for R2RPE.
Chen, Weihai, Chen, Wenjie, Jin, Yan, Liu, Jingmeng, Yang, Shang   +4 more
core   +1 more source

Self-organizing fuzzy sliding-mode control for a voice coil motor [PDF]

[[abstract]]Voice coil motor (VCM) is widely known as its topquality of free friction, low noise, fast transient response and well repeatability. Yet the dynamic characteristic of a VCM is nonlinear and time-varying, thus the model-based conventional ...
許駿飛
core   +1 more source