Profile 簡介
Principal researcher實驗室負責人
Dr Chan's main research field is on vibration engineering, structural dynamics and rotordynamics. Specific research interests include computational mechanics of materials, experimental and operational modal analysis, model updating, vibration measurement technology and multiphysics analysis of spindles. Besides academic value, Dr Chan's research responds to the needs of public research institutes and numerous enterprises in central Taiwan.
陳任之老師的研究領域為振動學、結構動力學及轉子動力學，具體題目有計算材料力學、實驗及運行模態分析、模型修正、振動量測技術及主軸多重物理分析等。研究領域除學術價值，陳老師之研究也回應法人單位及台灣中部多家廠商的需求。
研究領域 Research Field
Computational Mechanics of Materials 計算材料力學
Goals: Reduce the computational effort in determining dynamic properties of beams, plates and other popular structures, and build models which accommodates continual changes in geometry and support conditions in practice.
研究目標：降低計算樑和板等常見結構動態特性所須之計算量，並在電腦模型中，納入實際應用時所遇到的幾何及支撐方式的持續變化。
Experimental and Operational Modal Analysis 實驗及運行模態分析
Modal analysis finds the natural frequencies, damping ratios and mode shapes of structures based on relationship between external force ("excitation") and resulting vibration ("response"). This topic can be further divided into Experimental Modal Analysis (EMA) and Operational Modal Analysis (OMA) algorithms according to the nature of excitation.
Scope of research: (1) determine the best parameters of algorithms, (2) improve existing EMA algorithms, (3) apply Operational Modal Analysis to machine tools and (4) structural diagnostics (such as car body) based on modal analysis methods.
模態分析是利用已知激振力－響應之關係，找出自然頻率、阻尼比及模態振型。依據外力的激振型式，現時有實驗模態分析（Experimental modal analysis，EMA）、操作模態分析（Operational modal analysis，OMA）兩種演算法。
研究範圍：（一）分析演算法的最佳參數；（二）改良現有實驗模態分析演算法，長遠令實驗模態分析自動化；（三）利用操作模態分析進行工具機動態分析上；（四）利用模態分析方法，找出機器結構（如車廂內部噪音）問題
Model updating模型修正
Accurate computer models of machine tools (also known as "virtual machine tools" or "digital twins") is an enabling technology of Industry 4.0 initiative. However, some parameters in machine tools are difficult to be sought, and are currently determined after trial-and-error without theoretical basis.
Goal: Develop procedure to determine physical parameters of machine structures, especially those that are difficult to be derived analytically.
準確的工具機電腦模型（亦稱「虛擬工具機」）是「生產力4.0」的先期技術。可是某些參數不易得知，現時業界依賴試誤法找出參數，當中缺乏理論依據。
研究目標：建立判定機器結構、特別是難以利用理論推導之物理參數之方法。
Vibration measurement technologies振動量測技術
Research scope: (1) design electromagnetic exciters to apply external force to rotating structures, (2) measurement of stiffness change of spindles upon rotating speed, (3) determination of dynamic parameters of structures from acceleration data captured using microprocessor unit (MCU) with microelectromechanical (MEMS) accelerometers.
研究方向：（一）設計用於激振轉動結構之電磁激振器、（二）量測主軸隨轉速帶來的靜剛性變化及（三）利用微控制器及微機電加速規，同時量測多點之振動加速度，搭配模態分析演算法，得出自然頻率等動態參數。
Multiphysics Analysis of Machine Tool Spindles 主軸多重物理分析
Goal: Improve temperature distribution, thermal distortion and dynamic stiffness of machine tool spindles, such that higher speed and power are allowed.
研究目的：改善工具機主軸溫度分布、熱變形量及動剛性，提升主軸之功率及最高轉速