中空圓柱型壓電振致動元件之設計與應用

Design and Application of Hollow Cylindrical Piezoelectric Vibrator

蔡宗軒(Tzung-shiuan Tasi)

指導教授 ： 丁鏞

中原大學/工學院/機械工程研究所/碩士(2012年)

https://doi.org/10.6840/cycu201200928

摘要

本論文主要為設計製作一壓電式中空圓柱型振動子，藉由兩種不同的邊界條件可分別應用於致動元件或感測元件。前者為將中空圓柱型壓電材料貼附一金屬管上，放大壓電振動之效果，再將前後兩端點固定住，使金屬管造成半波形狀的軸對稱變形，則在金屬管上之中點獲得最大形變產生，輔助以其他機構設計可應用於如液滴塗佈或噴霧之系統。後者為將此中空圓柱型振動子以不同極化方式極化，再以懸臂樑的架設方式操作，則於邊界端產生最大之振動形變，可用來設計振動式陀螺儀感測器。
本文係利用有限元素分析軟體ANSYS來進行模態分析，設計不同型式之壓電材料及長度，找出最大振幅供致動器應用，經模擬分析及實驗結果證明一種三等分扇形壓電材料貼附於金屬管可獲得很高之振幅。另進行壓電陀螺儀感測元件的第一與第二模態之設計分析及其振幅的量測，由模擬結果顯示中空圓柱型的陀螺儀搭配懸臂樑架設的方式，其振動振幅明顯高於使用圓柱體兩端固定架設的方式。

關鍵字

扇形 ； 壓電振動子 ； 中空圓柱型 ； 壓電致動器及陀螺儀感測器

並列摘要

Abstract
Motivation of this thesis is to design a piezoelectric hollow cylindrical vibrator for actuator or sensor application by means of different boundary conditions. The hollow cylindrical piezoelectric pieces are attached to a metal hollow tube in order to amplify the piezoelectric vibration. While the piezoelectric vibrator is fixed at both the ends, the metal hollow tube is generated with half wave with maximum amplitude in the middle point at appropriate driving frequency. Such a wave associated with auxiliary mechanism can be used for atomization. The latter gyroscope sensor application makes use of different polarization and cantilever structure so that large deformation at the end of the cantilever is gained.
Finite element method provided by ANSYS is used for modal analysis. Various shapes and length of piezoelectric ceramics are investigated to search for maximum amplitude if or actuator application. Through simulation analysis and experiment, the sectional type with three equal circumferential length and clearance would obtain higher amplitude. For piezoelectric vibration gyroscope sensor, the first and second modes are searched and the amplitude is measured. Via simulation analysis, the hollow tube with proper employment of piezoelectric actuator onto its surface and the output at the end of the cantilever would gain much better amplitude as compared to the solid rod type with output in the middle under the condition of both ends fixed.

並列關鍵字

piezoelectric actuator and gyroscope ； sectional type ； cylindrical hollow tube

參考文獻

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