混成形狀記憶材料吸振器之適應滑動模式控制

Adaptive Sliding Mode Control of Vibration Absorber Made of Tunable Hybrid Shape Memory Materials

蕭俊祥(Jin-Siang Shaw) ； 黃繼緯(Chi-Wei Huang)

《中華民國振動與噪音工程學會論文集》 2013 (2013/06) Pp. 256-260

摘要

本研究利用形狀記憶材料製成混成可調變吸振器，將混成吸振器裝置在主系統懸臂梁上，並運用適應性滑動模式控制理論，再搭配類神經網路訓練其逆向模型，以控制吸振器之加熱與冷卻，藉以改變吸振器之剛性與阻尼，降低結構系統在單一激振頻率下之振幅，並與天勾控制法比較其減振效果。實驗結果顯示適應性滑動模式控制，當激振頻率偏離原本設計吸振器自然頻率時，可適應迴避系統共振發生，建立具有適應性與強健性之減振系統。

關鍵字

混成形狀記憶材料 ； 可調式振動吸收器 ； 適應性滑動模式控制 ； 類神經網路

並列摘要

In this paper a hybrid tunable vibration absorber has been made of shape memory materials. This vibration absorber is added to a main system of a cantilevered beam. Adaptive sliding mode control is applied, along with an artificial neural network to modeling the system's inverse dynamics, to suppress the system vibration by adjusting the vibration absorber stiffness and damping ratios when the system is subject to a single frequency external excitation. Experimental results are to be compared to those obtained by skyhook controller. It is shown experimentally that when disturbance frequency is varied away from the designed natural frequency of the vibration absorber, adaptive sliding mode control can effectively detune the system so as to avoid resonant vibration, hence ensuring adaptive and robust vibration suppression performance of the system.

並列關鍵字

Hybrid Shape Memory Materials ； Tunable Vibration Absorber ； Adaptive Sliding Mode Control ； Neural Network