TY - JOUR

T1 - Viscoelastic analytical model and design of polymer-based bimodal piezoelectric motor

AU - Cao, Teng

AU - Li, Xiaoniu

AU - Wang, Boquan

AU - Mi, Yuan

AU - Zhao, Gai

AU - Twiefel, Jens

AU - Wu, Dawei

N1 - Funding Information: This work was supported by the National Natural Science Foundation of China (Grant no. 51675278 and 51905265); the Project of Key Research and Development Plan (Social Development) of Jiangsu Province (No. BE2017730); and the Project funded by China Postdoctoral Science Foundation (Grant no. 2019 M661820).

PY - 2020/11

Y1 - 2020/11

N2 - Polymers have attracted enormous attention due to their characteristics of low density and high energy density for potential applications in low weight piezoelectric motors. However, the viscosity of polymers presents a challenge to match two resonance frequencies of the longitudinal and bending modes of the bimodal piezoelectric motor. In this paper, polyphenylene sulfide (PPS)-based bimodal piezoelectric motor is researched. Concerning the viscoelasticity of PPS, the electromechanical coupling analytical model is established to describe the dynamics of the PPS-based motor by using the Kelvin-Voigt viscoelastic model. Based on the proposed model, the Taguchi method is adopted to match the resonance frequencies of the longitudinal and bending vibration. A PPS-based prototype motor is fabricated with optimized parameters. The frequency response characteristics, displacement response and electromechanical coupling coefficients are computed and compared to the finite element method and experimental results to validate the effectiveness of the model. The comparisons show that the proposed model is valid. The performance test demonstrates that the PPS-based motor can yield the maximal torque of 2 mNm with the stator weight of 5.4 g. Compared with the same volume of phosphor bronze material, 75% of weight reduction can be achieved.

AB - Polymers have attracted enormous attention due to their characteristics of low density and high energy density for potential applications in low weight piezoelectric motors. However, the viscosity of polymers presents a challenge to match two resonance frequencies of the longitudinal and bending modes of the bimodal piezoelectric motor. In this paper, polyphenylene sulfide (PPS)-based bimodal piezoelectric motor is researched. Concerning the viscoelasticity of PPS, the electromechanical coupling analytical model is established to describe the dynamics of the PPS-based motor by using the Kelvin-Voigt viscoelastic model. Based on the proposed model, the Taguchi method is adopted to match the resonance frequencies of the longitudinal and bending vibration. A PPS-based prototype motor is fabricated with optimized parameters. The frequency response characteristics, displacement response and electromechanical coupling coefficients are computed and compared to the finite element method and experimental results to validate the effectiveness of the model. The comparisons show that the proposed model is valid. The performance test demonstrates that the PPS-based motor can yield the maximal torque of 2 mNm with the stator weight of 5.4 g. Compared with the same volume of phosphor bronze material, 75% of weight reduction can be achieved.

KW - Analytical model

KW - Kelvin-Voigt

KW - Piezoelectric motor

KW - Polymers

KW - Taguchi method

UR - http://www.scopus.com/inward/record.url?scp=85085084157&partnerID=8YFLogxK

U2 - 10.1016/j.ymssp.2020.106960

DO - 10.1016/j.ymssp.2020.106960

M3 - Article

AN - SCOPUS:85085084157

VL - 145

JO - Mechanical Systems and Signal Processing

JF - Mechanical Systems and Signal Processing

SN - 0888-3270

M1 - 106960

ER -