Title: Open-loop creep suppression of a piezoelectric actuator by applying directional change in voltage
Authors: Xueliang Zhao; Chengjin Zhang; Hongbo Liu
School of Control Science and Engineering, Shandong University, Jinan, Shandong 250061, China; School of Information Engineering, Taishan Medical University, Taian, Shandong 271016, China
School of Control Science and Engineering, Shandong University, Jinan, Shandong 250061, China; School of Mechanical, Electrical and Information Engineering, Shandong University at Weihai, Shandong 264209, China
School of Control Science and Engineering, Shandong University, Jinan, Shandong 250061, China
Abstract: Changes in direction of applied voltage can reset the creep of piezoelectric actuators (PZTs); however, the relationship between creep suppression and times or amplitude of the directional change in voltage remains unknown. Firstly, the effect of the directional times is investigated experimentally by applied sine waves with different frequencies and amplitudes. Results show that directional times slightly affect creep rate, but a appropriate amplitude can drive the creep rate to zero. When there is only once directional change, the relaxation voltage evolves into a bi-directional small amplitude spike voltage (BSASV). BSASV is used to investigate the validity of creep suppression and hysteresis further by different durations and numbers of spike applied. These results can be used to guide the optimal direction of nonlinear suppression.
Keywords: creep suppression; open-loop; directional change; piezoelectric actuators; voltage change; sine waves; amplitude; creep rate; hysteresis.
Int. J. of Nanomanufacturing, 2016 Vol.12, No.1, pp.41 - 54
Submission date: 22 Sep 2015
Date of acceptance: 27 Nov 2015
Available online: 26 Apr 2016