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Title: Model, design & development of piezoelectric ultrasonic motor
Keywords: Piezoelectric ultrasonic motor, plate and shell, finite element method
Issue Date: 20-Apr-2006
Citation: DUAN WENHUI (2006-04-20). Model, design & development of piezoelectric ultrasonic motor. ScholarBank@NUS Repository.
Abstract: The objectives of this research are to develop advanced models for accurate prediction of the performance of piezoelectric traveling-wave ultrasonic motor (USM), and to improve upon the typical USM configuration by investigating novel designs leading to the proposed USM with multiple wave numbers.Analytical solutions for the free vibration of piezo-coupled plates and non-uniform thickness plates to facilitate preliminary design are presented and validated by FE analysis. For detailed design and analysis of the overall behavior of USM, the stator, rotor and interface need to be coupled together. However, this results in computational difficulties such as instability of explicit scheme and convergence problem of implicit scheme. The problem is solved using thermal analogy via 3D FE analysis. The FE model is then used to perform parametric studies, from which prototype multi-wave number USM is designed and fabricated in the laboratory. It is demonstrated that this novel implementation significantly improves the performance of USM and offers the extra controllability.
Appears in Collections:Ph.D Theses (Open)

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