Results 41 to 50 of about 28,776 (207)

High speed video capture for mobile phone cameras [PDF]

, 2012
We consider an electromechanical model for the operation of a voice coil motor in a mobile phone camera, with the aim of optimizing how a lens can be moved to a desired focusing motion. Although a methodology is developed for optimizing lens shift, there
Burke, M., Burns, S., Cook, S.P., Dellar, P.J., Dewynne, J., Hickey, C., Hjorth, P.G., Lee, W.T., Melnik, A., Moroney, K., Murphy, E., O'Callaghan, R., Vynnycky, M.   +12 more
core  

Design and Implementation of Bulk Feeders Using Voice Coil Motors

Actuators
Bulk feeders that can automatically feed materials are one of the most commonly used vibration devices in the electronics industry. This study uses voice coil motors to design and implement a dual-axis bulk feeder and a quad-axis bulk feeder, allowing ...
Yu-Ting Yang, Wen-Tan Wang, Ching-Chang Wong   +2 more
doaj   +1 more source

Ride Comfort Control System Considering Physiological and Psychological Characteristics: Effect of Masking on Vertical Vibration on Passengers

Actuators, 2018
Active seat suspension has been proposed to improve ride comfort for ultra-compact mobility. Regarding the ride comfort of passengers due to vertical vibration, the authors have confirmed from biometry measurements that reduction of the vibration ...
Keigo Ikeda, Ayato Endo, Ryosuke Minowa, Takayoshi Narita, Hideaki Kato   +4 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

Enabling the recycling of rare earth elements through product design and trend analyses of hard disk drives [PDF]

, 2015
Hard disk drives consist of a complex mix of various materials. While Aluminum, Copper and Steel are easy to separate, actual recycling processes dilute containing rare earth elements to non-recoverable grades in other material streams.
Rotter, Vera Susanne, Ueberschaar, Maximilian   +1 more
core   +1 more source

Adaptive Fault-Tolerant Control Against Actuator Failures for a Fast Steering Mirror System With a Six-Point Driving Structure

IEEE Access
In this paper, a novel adaptive fault-tolerant control (FTC) scheme for voice coil motor-driven fast steering mirror (FSM) systems is proposed. To improve the traditional four-point driving structure of voice coil motors, a six-point redundant driving ...
Chuanqing Wang, Hupo Ouyang, Erbo Zou, Aidong Liu   +3 more
doaj   +1 more source

Analysis of Factors Influencing Peak Torques and Peak Losses of Rotary Voice Coil Actuators Used in Aerospace

IEEE Access, 2021
Rotary voice coil actuators (RVCAs) are commonly used for precision servo drive systems working within limited angle range in some fields including aerospace.
Li Yong, Wu Jiaxin, Hu Jianhui, Wang Qian, Liu Chengjun   +4 more
doaj   +1 more source

Tailoring Plate Thickness of a Helmholtz Resonator for Improved Sound Attenuation [PDF]

, 2016
A Helmholtz resonator with flexible plate attenuates noise in exhaust ducts, and the transmission loss function quantifies the amount of filtered noise at a desired frequency.
Duncan, Scott, Nudehi, Shahin
core   +2 more sources

ALMA Nutator Design and Preliminary Performance

, 2012
We report the past two years of collaboration between the different actors on the ALMA nutator. Building on previous developments, the nutator has seen changes in much of the design. A high-modulus carbon fiber structure has been added on the back of the
Chen, Ming-Tang, Chen, Wei-Long, Ford, John, Ho, Paul T. P., Koch, Patrick M., Martin-Cocher, Pierre, Ni, Chih-Wen, Ong, Chin-Long, Raffin, Philippe, Symmes, Arthur   +9 more
core   +1 more source

Distinguishing between cognitive explanations of the problem size effect in mental arithmetic via representational similarity analysis of fMRI data [PDF]

, 2019
Not all researchers interested in human behavior remain convinced that modern neuroimaging techniques have much to contribute to distinguishing between competing cognitive models for explaining human behavior, especially if one removes reverse inference ...
De Smedt, Bert, Fias, Wim, Lyons, Ian M., tiberghien, Kerensa   +3 more
core   +2 more sources