智慧型高頻減振系統之設計

Design of An Intelligent Material for High-frequency Vibration Suppression

許哲綸(Je-Guan Xu)

指導教授 ： 丁鏞

中原大學/工學院/機械工程研究所/碩士(2009年)

https://doi.org/10.6840/cycu200900261

摘要

本研究主要在設計一套智慧型減振系統，以噪音造成矩型薄板之振動為例，設計及評估抑制效果。噪音受外界的影響，訊號會有許多頻率的疊加，而會顯得非常的不穩定且複雜。針對矩型薄板之模擬分析結果，找出可能較受影響而產生較大之振動量之頻率，並根據聲學定義，人類對於較低頻(小於200Hz)與較高頻(大於10kHz)之聲音感受度較差，而對於500Hz~5KH間的聲音感受度會較敏感，而選定某些頻率之振動量予以減振。
研究內容包括新式壓電智能材料( 剪切效應之壓電陶瓷元件)設計、及利用壓電元件製作方式提升感應器之靈敏度與致動器之應變量、及利用ANSYS軟體，針對電極之間距、線寬、厚度與極化電壓等不同參數進行分析，找出最佳設計以提升感應器與致動器之性能、及針對噪音經薄板產生之較大振動及可能造成之干擾雜音所對應之頻率進行減振、及利用有限元素法建立系統之動態數學模型以及設計適當之控制法進行模擬分析並評估減振效益。

關鍵字

智能材料 ； 振動控制

並列摘要

A self-detecting and self-actuating system, which is able to suppress high-frequency vibration of the selected example of flat plate structure caused by environmental noise, is investigated. To fully overcome such complex vibration of very wide frequency is not feasible. It is thus attempted to search out the large vibration amplitude of vibration with frequency about 500Hz~5KH that is sensitive and influential to human’s hearing. Following that, vibration in the chosen frequency can be reduced by using appropriate control law.
In this study, design of smart material made by piezoelectric ceramics, sensitivity and actuation evaluation of the smart material, optimal design of polarization and electrode layout by using ANSYS, design and simulation of vibration control method, and performance evaluation of vibration suppression are included.

並列關鍵字

vibration control ； smart material

參考文獻

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