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Author Kim, Chuljin ♦ Kim, Sung Joo ♦ Yang, Hyunseok ♦ Park, Cheol ♦ Park, Young Pil
Source SpringerLink
Content type Text
Publisher Korean Society for Precision Engineering
File Format PDF
Copyright Year ©2012
Language English
Subject Domain (in DDC) Technology ♦ Engineering & allied operations
Subject Keyword Ionic polymer-metal composites (IPMC) ♦ AF (auto-focus) Lens Actuator ♦ Off-line least square parameter estimation ♦ PID-controller ♦ Materials Science ♦ Industrial and Production Engineering
Abstract Ionic polymer metal composites (IPMCs) are attractive smart materials. We propose an auto-focus (AF) lens actuator using IPMCs for cellular phones. In order to ensure stability, IPMCs were fabricated by using a plasma surface treatment and an ionic liquid solvent. AF lens actuator using IPMCs was designed to implement a large displacement and increased force by using a curved IPMCs. And the actuator had a structure with two springs to ensure stable AF actuation. Subsequently, a prototype AF lens actuator was fabricated. The parameters of the actuator were estimated from experimental data and a linear model of the AF lens actuator system. Then, a proportional-integral-derivative controller was designed, and the motion of the AF lens actuator was demonstrated through simulations and experiments.
ISSN 22347593
Age Range 18 to 22 years ♦ above 22 year
Educational Use Research
Education Level UG and PG
Learning Resource Type Article
Publisher Date 2012-09-30
Publisher Place Springer
e-ISSN 20054602
Journal International Journal of Precision Engineering and Manufacturing
Volume Number 13
Issue Number 10
Page Count 5
Starting Page 1883
Ending Page 1887

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Source: SpringerLink