Please use this identifier to cite or link to this item: `http://hdl.handle.net/11455/1689`
 標題: 複合材料疊層樑振動之數位控制實驗探討Experimental Studies of Vibration Control of Laminated Composite Beams Using Digital Approach 作者: 劉建中Liu, Chien-Chung 關鍵字: modal coordinates;模態座標;performance index;state equation;estimator;state feedback-gain;性能指標;狀態方程式;估測器;狀態回授增益 出版社: 機械工程學系 摘要: 中文摘要 本文主旨在利用LQG控制法則設計控制器，配合壓電感測器 與致動器用於抑制複合材料樑的振動，並將理論所設計的控制器運用到實 驗中，利用實驗來驗證理論之正確性。 首先利用[15]中所推導出來含 脫層之複合材料樑的運動方程式及感測器方程式，將其轉換為模態座標的 狀態空間方程式，並利用LQG的控制架構設計控制器。文中除對理論所設 計出的數位控制器做電腦模擬外，也將說明實驗中控制器的設計與實驗流 程，以及討論設計參數對控制的影響。所做的實驗結果證實，應用本文控 制理論確實能對複材樑的振動做有效的抑制。ABSTRACT The aim of this study is to design a digital controller to suppress the vibration of a laminated composite beam. The controller is designed according to the linear quadratic Gaussian (LQG) control theory, and piezoelectric materials are used as sensors and actuators. The controller is then implemented in experiments to verify the validity of the theory. The equations of motion and sensor equations being used are those developed in reference [15] for delaminated composite beams with piezoelectric sensors and actuators. Firstly, they are transformed into a state-space form using modal coordinates as its states. Then the LQG theory is employed to design two kinds of the digital controller. The first kind of the controller consists of a state feedback control law and a prediction-type Kalman filter, while for the second an additional feedfoward control law is added. In order to find a suitable controller, computer simulations for control systems are performed. The desired digital controller is then implemented by a personal computer and the tests are carried out. The experiment setup and test procedures are explained and the influence of design parameters on control is evaluated. The experiment results indicate that it is feasible to control the vibration of composite beams using the controllers developed herein. URI: http://hdl.handle.net/11455/1689 Appears in Collections: 機械工程學系所