Optimal Placement of Actuators and Sensors for Composite Wing Structures

• Main Authors: Chih-Hsing Tsai, 蔡志欣
• Other Authors: Chyanbin Hwu
• Format: Others
• Language: zh-TW
• Published: 2004
• Online Access: http://ndltd.ncl.edu.tw/handle/93531982596195196257

碩士 === 國立成功大學 === 航空太空工程學系碩博士班 === 92 === 　　Although some investigations about optimal placements of sensors and actuators can be found, it’s rare seen the research concering the composite wing structures. Besides, it is often hard to see separated placements cases compared with collocated cases. 　　The purpose of this paper is to find the optimal placement of actuators and sensors for composite wing structures. In optimization problem,a quadratic function related to the vibration amplitude and control input is defined as the objective function which will be minimized to find the optimal placements. 　　In vibration control, the first three natural vibration modes are considered. Piezoelectric materials are selected as actuators and sensors which are bonded on the upper and lower wing surfaces. 　　Using Linear Quadratic Gaussian (LQG) algorithm to be the controller design and chosing Kalman estimator as state observer for this system, a feedback control system is designed and implemented. 　　Finally, in optimal placement analysis, the numerical simulations are done by the software MATLAB and the optimal locations are presented for different cases.