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Micromachines 2017, 8(12), 360;

Nano-Scale Positioning Design with Piezoelectric Materials

Department of Systems and Naval Mechatronics Engineering of National Cheng Kung University, Tainan 701, Taiwan
Department of Mechanical Engineering of National Pingtung University of Science and Technology, Pingtung 91201, Taiwan
Hsien Chi Primary School, Pingtung 93245, Taiwan
Author to whom correspondence should be addressed.
Received: 31 October 2017 / Revised: 3 December 2017 / Accepted: 8 December 2017 / Published: 12 December 2017
(This article belongs to the Special Issue Selected Papers from IEEE ICASI 2017)
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Piezoelectric materials naturally possess high potential to deliver nano-scale positioning resolution; hence, they are adopted in a variety of engineering applications widely. Unfortunately, unacceptable positioning errors always appear because of the natural hysteresis effect of the piezoelectric materials. This natural property must be mitigated in practical applications. For solving this drawback, a nonlinear positioning design is proposed in this article. This nonlinear positioning design of piezoelectric materials is realized by the following four steps: 1. The famous Bouc–Wen model is utilized to present the input and output behaviors of piezoelectric materials; 2. System parameters of the Bouc–Wen model that describe the characteristics of piezoelectric materials are simultaneously identified with the particle swam optimization method; 3. Stability verification for the identified Bouc–Wen model; 4. A nonlinear feedback linearization control design is derived for the nano-scale positioning design of the piezoelectric material, mathematically. One important contribution of this investigation is that the positioning error between the output displacement of the controlled piezoelectric materials and the desired trajectory in nano-scale level can be proven to converge to zero asymptotically, under the effect of the hysteresis. View Full-Text
Keywords: piezoelectric material; Bouc–Wen model; hysteresis effect; nano-scale positioning design; nonlinear control piezoelectric material; Bouc–Wen model; hysteresis effect; nano-scale positioning design; nonlinear control

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Chen, Y.Y.; Chen, Y.H.; Huang, C.Y. Nano-Scale Positioning Design with Piezoelectric Materials. Micromachines 2017, 8, 360.

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