車削細長型工件的主動式顫振抑制控制器

Active Chatter Suppression of Slender Workpieces in Turning

黃建立(Jian-Lih Hwang) ； 陳孝武(Shiao-Wu Chen) ； 陳正和(Cheng-Huo Chen) ； 吳允華(Yun-Hwa Wu) ； 吳仲偉(Chung-Wei Wu)

《中華民國振動與噪音工程學會論文集》 2008 (2008/05) Pp. 502-509

https://doi.org/10.30028/CSSVANNUAL.200805.0502

摘要

顫振(chatter)現象是切削加工時的自發性振動，使工件和刀具產生激烈的振動，降低工件的表面精度，使刀具磨損或斷裂，限制材料移除率，能抑制顫振則能提昇加工性能。本文針對車削細長型工件的顫振抑制問題加以探討，以壓電致動器驅動的刀具取代傳統車刀，並設計控制器以抑制顫振。控制器採用回授式濾波型最小均方(filtered-X LMS, FXLMS)演算法，模擬結果顯示，若刀具和工件的相對位移可以量測，FXLMS控制器可成功抑制顫振。在實務上，工件的位移不容易量測，本文另外設計一個工件模式預測的FXLMS控制器，並設計一個實驗架構，包括實際的壓電致動刀具及電腦模擬的切削動態，以驗證控制器性能。

關鍵字

顫振 ； 切削 ； 控制 ； 適應性濾波器

並列摘要

Chatter is a self-excited vibration during machining that causes violent vibration between the tool and the workpiece. Chatter degrades surface finish, causes wear or breakage of tools and limits the material removal rate. Therefore, the ability to suppress chatter can improve machining performance significantly. In this study, the chatter suppression problem is investigated for slender workpieces in turning. A tool holder driven by a piezoelectric actuator is designed. The feedback filtered-x least mean square (FXLMS) algorithm is applied for designing an active controller. Simulation results show that the controller can suppress chatter in turning effectively. A hardware-in-the-loop experiment is setup with the real piezo-actuated tool holder in the simulated cutting dynamic loop. The experimental results also indicate that the proposed FXLMS controller can improve machining performance.

並列關鍵字

chatter ； cutting ； control ； adaptive filter