title: Piezoelectric Actuated Phase Shifter Based on External Laser Interferometer: Design, Control and Experimental Validation.
abstract: To improve the phase-shifting accuracy, this paper presents a novel integrated framework for design, control and experimental validation of the piezoelectric actuated phase shifter with a trade-off between accuracy and cost. The piezoelectric actuators with built-in sensors are adopted to drive the double parallel four-bar linkage flexure hinge-based mechanisms. Three mechanisms form the tripod structure of the assembled phase shifter. Then, a semi-closed loop controller with inner feedback and outer feedforward loops via the external laser interferometer is developed for accurate positioning of the phase shifter. Finally, experiments related with travel range, step response, linearity and repeatability are carried out. The linearity error is 0.21% and the repeatability error of 10 μ m displacement is 3 nm. The results clearly demonstrate the good performance of the developed phase shifter and the feasibility of the proposed integrated framework.
authors.affiliation: Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun 130033, China. lipengzhi@ciomp.ac.cn.|University of Chinese Academy of Sciences, Beijing 100049, China. lipengzhi@ciomp.ac.cn.
authors.forename: Peng-Zhi
authors.initials: PZ
authors.lastname: Li
authors.affiliation: Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun 130033, China. wangxd@ciomp.ac.cn.
authors.forename: Xiao-Dong
authors.initials: XD
authors.lastname: Wang
authors.affiliation: Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun 130033, China. suiyx@sklao.ac.cn.
authors.forename: Yong-Xin
authors.initials: YX
authors.lastname: Sui
authors.affiliation: Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun 130033, China. zhangdf@sklao.ac.cn.
authors.forename: De-Fu
authors.initials: DF
authors.lastname: Zhang
authors.affiliation: Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun 130033, China. wangdf@sklao.ac.cn.|University of Chinese Academy of Sciences, Beijing 100049, China. wangdf@sklao.ac.cn.
authors.forename: Dong-Fang
authors.initials: DF
authors.lastname: Wang
authors.affiliation: Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun 130033, China. donglj@ciomp.ac.cn.
authors.forename: Li-Jian
authors.initials: LJ
authors.lastname: Dong
authors.affiliation: Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun 130033, China. nimy@sklao.ac.cn.
authors.forename: Ming-Yang
authors.initials: MY
authors.lastname: Ni
keywords: flexure; laser interferometer; piezoelectric actuators; semi-closed loop