Results 11 to 20 of about 764 (161)

Design of a Voice Coil Motor Actuator With L-Shape Coils for Optical Zooming Smartphone Cameras

IEEE Access, 2020
This paper proposes a voice coil motor (VCM) with a novel electromagnetic structure for smartphone OZ actuators, and the advantages of this novel design are its long displacement, compact size, and more powerful and stable Lorentz force. These advantages
Chang-Lin Hsieh, Chien-Sheng Liu
doaj   +3 more sources

Robust fractional‐order integral terminal sliding mode control with adaptive uncertainty observation for a VCM‐driven X–Y motion stage

IET Electric Power Applications, 2023
In this study, a fractional‐order integral terminal sliding mode control (FITSMC) system is proposed to control a new voice coil motor (VCM)‐driven X–Y motion stage with different thrust forces in the X–Y axes for the tracking of reference contours ...
Syuan‐Yi Chen, Guan‐Wei Wu, Cheng‐Jui Yu   +2 more
doaj   +2 more sources

Modeling and simulation of the control system for the plane mirror rotating interferometer

Engineering Reports
To solve the problem of optical path difference velocity (OPDV) stability in the Fourier spectrometer, a Cerebellar Model Articulation Controller‐Proportional‐Integral‐Derivative (CMAC‐PID) composite control strategy is proposed. The relationship between
Yusheng Qin, Xiangxian Li, Xin Han, Jingjing Tong, Minguang Gao   +4 more
doaj   +2 more sources

RBF Neural Network-Compensated Adaptive Sliding Mode Control for Elevator Vibration Suppression

Shock and Vibration
To address lateral vibration challenges in elevator systems during operation, a high-fidelity coupled dynamic model integrating the elevator car-guide rail structure and voice coil motor (VCM) actuator is developed.
Shuzhen Li, Jun Zhang, Junbiao Xie, Chenglong Pan   +3 more
doaj   +2 more sources

3D Printing a Low-Cost Miniature Accommodating Optical Microscope. [PDF]

Adv Mater, 2023
The key optical and optomechanical components of a miniature accommodating optical microscope are 3D printed in 50 min for less than $4. Synergizing the built‐in voice‐coil motor and compliant optomechanics facilitates focus‐stacking functionality for extending imaging depth.
Hai R, Shao G, Ware HOT, Jones EH, Sun C.   +4 more
europepmc   +2 more sources

Scaled transverse translation by planar optical elements for sub-pixel sampling and remote super-resolution imaging. [PDF]

Nanophotonics
Abstract High resolution imaging represents a relentless pursuit within the field of optical system. Multi‐frame super‐resolution (SR) is an effective method for enhancing sampling density, while it heavily relies on sub‐pixel scale displacement of a bulky camera.
Zhang Q, Xu X, Guo Y, Lu Y, He Q, Pu M, Li X, Xu M, Zhang F, Luo X.   +9 more
europepmc   +2 more sources

Vibrational stability improvement of a mirror system using active mass damping. [PDF]

J Synchrotron Radiat
Active damping with internal absolute velocity feedback was implemented to damp the angular vibration of a mirror holder for free‐electron laser beam transportation.Addressing the demand for high stability of beamline instruments at the SHINE facility, a high stability mirror regulating mechanism has been developed for mirror adjustments.
He S, Yuan H, Wu T, Chen N, Zhang X, Wang Z, Liu X, Liu F.   +7 more
europepmc   +2 more sources

Active Disturbance Rejection Control of Voice Coil Motor Active Suspension Based on Displacement Feedback

Actuators, 2022
Electromagnetic active suspension is an important technique used in vehicles to improve ride comfort and handling stability. To achieve satisfactory suspension performance, the active suspension control requires strong robustness against the vehicle ...
Feng Pan, Junlin Luo, Wei Wu
doaj   +1 more source

Measurement of Auto-Focus Driving Distance for Mobile Phone Camera Lens Using a Confocal Displacement Sensor [PDF]

한국정밀공학회지, 2018
In mobile phone cameras, usually a voice coil motor (VCM) is used as a micro-positioning device for the image autofocus (AF) because of its low cost, simplicity, and reliability.
Suk Woo Son, Hagyong Kihm
doaj   +1 more source

Effects of Geometric Sound on Brainwave Activity Patterns, Autonomic Nervous System Markers, Emotional Response, and Faraday Wave Pattern Morphology. [PDF]

Evid Based Complement Alternat Med
This study introduces Geometric Sound as a subfield of spatial sound featuring audio stimuli which are sonic holograms of mathematically defined 3D shapes. The effects of Geometric Sound on human physiology were investigated through EEG, heart rate, blood pressure, and a combination of questionnaires monitoring 50 healthy participants in two separate ...
Geffen R, Braun C.
europepmc   +2 more sources