智慧型控制應用於可調式混成形狀記憶材料之結構減振

Intelligent Control of Tunable Hybrid Shape Memory Material for Vibration Attenuation

黃俊都(Jiun-Du Huang)

指導教授 ： 蕭俊祥

國立臺北科技大學/機電學院/機電整合研究所/碩士(2012年)

https://doi.org/10.6841/NTUT.2012.00144

摘要

本研究利用形狀記憶材料(shape memory material)之半主動式混成可調變吸振器(tunable vibration absorber)，量測混成吸振器在不同控制溫度下之動態頻率響應特性。本體結構設計係將四條超彈性合金(Superelastic Alloys, SE)線，外套三層形狀記憶高分子聚合物(Shape Memory Polymer, SMP)套管，構成混成吸振器之彈性元件，藉由控制電流驅動混成吸振器之加熱與冷卻，改變混成吸振器之彈性元件的剛性與阻尼，使主系統結構之自然頻率改變，藉此達到最佳減振效果。本研究將混成吸振器裝置在一懸臂樑之動態主系統結構上，以回饋控制方式利用調變電流控制混成吸振器之動態頻率響應，以降低結構系統在單一固定頻率下激振之振幅。實驗結果顯示，混成吸振器之可調變頻率範圍約為45%，並藉由智慧型控制，同時迴避系統共振發生，建立具有適應性與強健性之減震系統。

關鍵字

混成形狀記憶材料 ； 可調變吸振器 ； 增益調變控制 ； 模糊邏輯控制 ； 天勾控制

並列摘要

Vibration absorber has been used as an effective tool in the vibration reduction of structure suffered single frequency excitation. An absorber consisted of a spring element made of hybrid shape memory materials was proposed. A cantilevered beam fabricated by superelastic (SE) core and shape memory polymer (SMP) sleeves was employed as the spring element of the absorber. By controlling the electric current through the SE core and thereby the temperature of the SMP sleeves, the natural frequency of the absorber was tunable. In this study, an absorber with actively tunable frequency capability may offer more powerful solution. The fabricated hybrid shape memory material absorber was capable of changing its natural frequency by more than 45%. By applying the intelligent control to the tunable vibration absorber, system resonance can be avoided thus ensuring adaptability and robustness of the damping system.

並列關鍵字

Hybrid Shape Memory Materials ； Tunable Vibration Absorber ； Gain Scheduling Control ； Fuzzy Control ； Skyhook Control

參考文獻

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