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

•Polyphenylene sulfide (PPS) is used as material of bimodal piezoelectric motor.•The viscoelastic electromechanical coupling model of the motor is proposed.•Utilizing Taguchi method to design the bimodal piezoelectric motor. Polymers have attracted enormous attention due to their characteristics of...

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Bibliographic Details
Published in:Mechanical systems and signal processing 2020-11, Vol.145 (C), p.106960, Article 106960
Main Authors: Cao, Teng, Li, Xiaoniu, Wang, Boquan, Mi, Yuan, Zhao, Gai, Twiefel, Jens, Wu, Dawei
Format: Article
Language:English
Subjects:
Analytical model
Bending vibration
Coupling coefficients
Finite element method
Flux density
Frequency response
Kelvin-Voigt
Mathematical models
Performance tests
Phosphor bronzes
Piezoelectric motor
Piezoelectric motors
Polymers
Polyphenylene sulfides
Resonance
Taguchi method
Taguchi methods
Viscoelasticity
Weight reduction
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Summary:•Polyphenylene sulfide (PPS) is used as material of bimodal piezoelectric motor.•The viscoelastic electromechanical coupling model of the motor is proposed.•Utilizing Taguchi method to design the bimodal piezoelectric motor. 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.
ISSN:0888-3270
1096-1216
DOI:10.1016/j.ymssp.2020.106960