模糊控制器於半主動摩擦阻尼器減震應用之探討

Fuzzy Logic Control for Seismic Structures with Semi-Active Friction Dampers

盧煉元(Lyan-Ywan Lu) ； 林錦隆(Ging-Long Lin)

《中國土木水利工程學刊》 20卷1期 (2008/03) Pp. 81-95

https://doi.org/10.6652/JoCICHE.200803_20(1).0007

摘要

模糊邏輯控制的觀念已廣泛地應用於機電控制等各領域之中，相較於傳統控制理論，其主要優點為：無須精確的數學模型、配合適當之控制規則，可確保控制之穩定性、可輕易地處理系統與量測的不確定性等。是故，本文試將模糊邏輯控制器應用於半主動摩擦阻尼器之控制中，以作為阻尼器於地震作用下摩擦界面施加正向力之依據。同時，為解決模糊規則庫之訂定過於主觀之問題，本文試將傳統主動控制理論引入模糊規則庫之設計中，藉以探討半主動模糊控制於地震作用下之減震效益。文中以一棟裝有半主動摩擦阻尼器之三層樓結構為例，數值模擬結果顯示相較於被動控制，模糊控制器可配合數量極少之半主動阻尼器與感應子使用，所得加速度減震效果即優於多數結構樓層皆安裝被動阻尼器時之案例。相較於直接對結構施加控制力之主動控制，兩者之控制效果十分接近，且其對量測雜訊之敏感度較主動控制低。

關鍵字

模糊邏輯控制 ； 摩擦阻尼 ； 半主動控制 ； 消能減震

並列摘要

Fuzzy logic control has been proven to be an effective control method for various engineering fields. Unlike traditional linear control, the advantage of fuzzy logic system is its inherent robustness to handle nonlinearities and uncertainties of the dynamic system. For this reason, in this paper, a fuzzy logic controller is applied to decide the clamping force in a semi-active friction damper subjected to an earthquake. The response of a three-story shear building equipped with a semi-active friction damper has been simulated. The design of the fuzzy controller is based on parameters obtained by the theory of modal control. The simulation result shows that by using few semi-active friction dampers and sensors, the proposed method is able to achieve better acceleration reduction than the case using multiple passive friction dampers. The control performance of the fuzzy control is also very close to that of the active modal control, and is less sensitive to measurement noise.

並列關鍵字

fuzzy logic control ； friction damper ； semi-active control ； energy dissipation