摘要
利用双模模态域光纤传感器的模间干涉感知薄板结构中应变的变化，获得薄板结构振动变化状况，进一步利用压电体作为作动元件，减小振幅，实现振动的主动控制．采用振型叠加法和直接积分相结合的方法，从理论上论证薄板分别受到正弦波激振力、脉冲激振力和方波激振力时的振动主动控制，并由脉冲激振下的响应得到控制前后的幅频特性曲线和相频特性曲线．
Modal domain optital fiber sensor (MDOFS) is Used in this peper to detect the strain’s variations of thin plate. Thus the vibration of the plate can be known. Then utilize the piezoelectric materials to control plate’s deformation and deduce the vibration amplitude. The method of combining the mode superposition and direct integration method is used in this paper. It demonstrates that the optical fiber and piezoelectric patch control system is very effective no matter what the kind of excitation the plate is bearing, such as sine wave excitation, pulse and rectangular excitations. Also the amplitude-frequence and phase-frequence curves are obtained from the pulse response.
出处
《固体力学学报》
CAS
CSCD
北大核心
1997年第3期213-221,共9页
Chinese Journal of Solid Mechanics
基金
国家自然科学基金
国家教委博士点基金
关键词
模态域
光纤传感器
压电片
机敏材料
振动控制
modal domian optical fiber sensor, piezoelectric patch, smart materials
