Dynamic Performance Improvement of Piezoelectrically Driven Micro-Lens Actuators

Autor:	Ssu-Han Chen, Syed Mamun R Rasid, Hemanshu R. Pota, Aron Michael, Chee Yee Kwok
Rok vydání:	2020
Předmět:	Computer Science::Robotics Microlens Materials science Settling time Control theory Mechanical Engineering Feedback controller Electrical and Electronic Engineering Performance improvement Actuator Stability (probability) Piezoelectricity Computer Science::Other
Zdroj:	Journal of Microelectromechanical Systems. 29:1418-1420
ISSN:	1941-0158 1057-7157
Popis:	This letter presents experimental results showing significant enhancement in the dynamic performance of a novel piezoelectric micro-lens actuator using a robust feedback resonant controller. The design of the feedback controller is based on experimentally identified model of the micro-lens actuator. The stability of the closed-loop system is proven by the negative imaginary theory. The experimental results show that the resonance peak and the settling time of the actuator are reduced by 27 dB and to 2.5 ms from 119 ms, respectively. Such improvement demonstrates the capability of the piezoelectric micro-lens actuator for fast auto-focus application in miniaturized camera. The reported performance makes it the fastest micro-lens actuator compared to other previously reported micro-lens actuators. [2020-0313]
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::345c81275b89ade14edbd5cc8b1f6a20 https://doi.org/10.1109/jmems.2020.3032670 Zobrazit plný text záznamu