An Auto-focus Lens Actuator Using Ionic Polymer Metal Composites: Design, Fabrication and Control

作者：Kim Chuljin^*; Kim Sung Joo; Yang Hyunseok; Park No Cheol; Park Young Pil

来源：International Journal of Precision Engineering and Manufacturing, 2012, 13(10): 1883-1887.

DOI：10.1007/s12541-012-0247-4

• Ionic polymer-metal composites (IPMC)
• AF (auto-focus) Lens Actuator
• Off-line least square parameter estimation
• PID-controller

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.

• 出版日期2012-10