Simultaneous quasi-static displacement and force self-sensing of piezoelectric actuators by detecting impedance

被引：10
|
作者：
Mansour, Sepehr Zarif [1 ]
Seethaler, Rudolf [1 ]
机构：
[1] Univ British Columbia, Sch Engn, Okanagan Campus, Kelowna, BC V1V 1V7, Canada
来源：
SENSORS AND ACTUATORS A-PHYSICAL | 2018年 / 274卷
基金：
加拿大自然科学与工程研究理事会;
关键词：
Piezoelectric actuator; Self-sensing; Impedance measurement; END-EFFECTOR; HYSTERESIS; CHARGE; MODEL;
D O I：
10.1016/j.sna.2018.03.022
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
This article extends the conventional permittivity change based displacement self-sensing technique for piezoelectric actuators to an impedance change based displacement-force self-sensing technique. The presented methodology evaluates changes in capacitance and resistance at an electrical resonance frequency and uses a third order polynomial fit to estimate displacement and force. Experimental validations show a mean error of 1.8%, and an error standard deviation of 1.9% for displacement and a mean error of 1.7%, and an error standard deviation of 1.8% for force. (C) 2018 Elsevier B.V. All rights reserved.
引用
收藏
页码：272 / 277
页数：6
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