Study on control of the vibration characteristics of an electro-mechanical coupled system

本計畫擬研究機電耦合系統結構振動特性控制。藉由回授等效之阻尼、質量和勁度控制結構之共振頻率、阻尼控制結構振動。由結構模態轉移函數與電路系統之二階低通濾波器等效之概念，設計一套由結構模態轉移函數與二階低通濾波器等效概念設計之控制器。採回授主動控制，藉由回授等效之阻尼、質量和勁度控制結構之共振頻率、阻尼控制結構振動。調整模組之模組增益及品質因數，及分流電路和壓電材料與結構的耦合，對結構單模態與多模態共振特性做有效控制。This project studied the vibration characteristics of a structure with piezo- ceramic sensors and actuators and electronic controller. Vibration characteristics of the coupled electro-mechanical system are manipulated via the piezoceramic actuator and the control electronic circuit. The controller was designed via the transfer function of the structure and the biquad second order filter circuits. The vibration of a beam structure is suppressed by properly tuning the quality factor and gain of the controller to increase the damping of the structure. We also studied the vibration characteristics of a rectangular beam with piezoceramic sensors and actuator. By feed back the equivalent damping, mass and stiffness via the controller to manipulate the natural frequency of the rectangular beam