光纤传感网络用于电磁流变结构的特性测试与工程控制

Fiber Optic Sensor Network for Characteristics Sensing and Engineering Control in Electrorheological Material Structures

电流变材料(Electrorheological-ER)是近年出现的能够在外加电场作用下改变性能的新材料,光纤传感器以其优良的抗电磁干扰能力成为ER构件的性能测试和应用研究中的首选.智能结构使用的难点之一是根据实际使用的目的和结构设计合适的传感器和控制系统.本文先探讨了偏振光纤传感器测量ER构件的动态应变的基本原理,然后以欧拉- 伯努利(Euler-Bernoulli)梁的横向弯曲振动为例讨论了一种用光纤传感网络判断一维振动的几阶振动模式的方法,进而探讨了二维情况下圆板振动模式的判断,可作为动态情况下智能结构实际使用的参考模式.

Electrorheologicalm aterialis one kind ofnew m aterials that em erged in recentyearsand could changeitscharacteristicsaccording to applied electricalfield. Because of em bedded fiberopticsensor′s feature ofelectrom agneticdisturbance-resistance, itbecom esone ofthem ostsuitable kindsofsensorsforERm aterial. In using som e intelligencestructuresone ofthe difficulties encountered isto design a practicable sensorsand controlsystem according to actualstructure and purpose. In this article firstly one schem e ofdynam ic m easurem entofER m aterialwith polarization fiber optic sensor is introduced, secondly w e discussed a m ethod of judging one dim ension vibration m ode by fiberopticsensornetw ork with landscape winding vi- bration ofa Euler-Bernoullibaras a exam ple, then we probed into judgm entoftw o dim ension vibration m ode ofa disk. Itcould be a reference m ode in using intelligence structureunderdy- nam ic condition. Key w ords Electrorheologicalm aterialstructure,Fiber optic sensor netw orFiber Optic Sensor Netw ork for Characteristics Sensing and Engineering Controlin ElectrorheologicalMaterialStructures Hou Fang Han Lei (Dept. ofMechanicaland ElectricalEngineering,Xiam en Univ.,Xiam en 361005) Abstract Electrorheologicalm aterialis one kind ofnew m aterials that em erged in recentyearsand could changeitscharacteristicsaccording to applied electricalfield. Because of em bedded fiberopticsensor′s feature ofelectrom agneticdisturbance-resistance, itbecom esone ofthem ostsuitable kindsofsensorsforERm aterial. In using som e intelligencestructuresone ofthe difficulties encountered isto design a practicable sensorsand controlsystem according to actualstructure and purpose. In this article firstly one schem e ofdynam ic m easurem entofER m aterialwith polarization fiber optic sensor is introduced, secondly w e discussed a m ethod of judging one dim ension vibration m ode by fiberopticsensornetw ork with landscape winding vi- bration ofa Euler-Bernoullibaras a exam ple, then we probed into judgm entoftw o dim ension vibration m ode ofa disk. Itcould be a reference m ode in using intelligence structureunderdy- nam ic condition.