2013-08-012024-05-18https://scholars.lib.ntu.edu.tw/handle/123456789/714535摘要：本計畫為三年計畫，將研究由先進壓電材料製成的致動器及感測器的動態特性，第一年將探討應用無鉛製程製作的陶瓷類壓電材料鈦酸鋇當作致動器時面內及面外運動的振動問題，以及其所引發壓電材料溫度驟升的研究，而在壓電陶瓷材料兩面鍍上不同電極分佈以作激振的電極設計也將影響壓電元件的動態特性，故本計畫亦將涵蓋電極設計對壓電元件振動的影響探討。計畫中亦將建立一套完整的壓電材料常數之量測方法，其結果可對於壓電元件的動態行為充分掌握並提供正確的設計及分析壓電元件特性的能力。本計畫第二年將探討PVDF壓電薄膜材料當作感測器的動態特性，並結合鈦酸鋇陶瓷類壓電材料當作致動器而形成智慧型結構，並配合控制理論來探討其應用於懸臂梁的抑振問題。本計畫第三年擬探討壓電纖維複材的動態特性，壓電纖維複材是一種新型的壓電材料，具有高變形與致動能力，可撓性高，易於貼附於具曲面物體表面之優點，可兼具感測器與致動器並可應用於人工肌肉。本計畫中主要以電子斑點干涉術的實驗方法對壓電材料作全域性的面內及面外振動模態以及共振頻率量測，並配合雷射都卜勒振動儀及阻抗分析的結果作深入之探討，以及應用熱像儀量測各不同共振頻率時之溫度變化。除此之外亦將應用有限元素數值計算作相關問題的理論研究並與實驗結果作比較，本研究計畫將整合且有系統地包含理論建立，數值計算以及實驗量測。<br> Abstract: The temperature in the piezoceramic specimen will increase rapidly with a short time period for high frequency resonant vibration. The design of the electrode on the two surfaces of the piezoceramic plate will influence the dynamic characteristics of the piezoceramic device and there are very few results available in the literature. In this three-year project, we employ an optical interferometry method called the amplitude-fluctuation electronic speckle pattern interferometry (AF-ESPI) to investigate the vibration characteristics of piezoceramic devices with different electrode design. Based on the fact that clear fringe patterns measured by the AF-ESPI method will be shown only at resonant frequencies, both the resonant frequencies and corresponding mode shapes are obtained experimentally at the same time. This project will focus on the dynamic characteristics of piezoelectric device (i.e., piezoceramic plate and piezoelectric fiber composite) that include the in-plane and out-of-plane modes. The dynamic characteristics of the PVDF sensor will be examined. Vibration suppression experiments from the smart system which include the PVDF as a sensor and and piezoceramic material as actuator will be performed. The influence of the electrode and temperature effect on the resonant vibration of piezoceramic devices will be discussed in detail. This project will also provide a reliable method for the determination of the material constants for piezoelectric material. The numerical finite element calculations are performed, and the results will be compared with the experimental measurements.電子斑點干涉術溫度壓電陶瓷板共振頻率模態鈦酸鋇聚偏二氟乙烯壓電纖維複材ESPItemperaturepiezoceramic plateresonant frequencymode shapePVDFpiezoelectric fiber composite