传感器优化布置的改进有效独立算法  

Optimal Sensor Placement for Bridge Structure Based on Improved Effective Independence

作　　者：程建旗[1] 闫维明[1] 陈彦江[1] 何浩祥[1] 张宇博[1] 

机构地区：[1]北京工业大学工程抗震与结构诊治北京市重点实验室,北京100124

出　　处：《振动．测试与诊断》2012年第5期812-816,866,共5页Journal of Vibration,Measurement & Diagnosis

基　　金：国家自然科学基金资助项目(编号:90715032;50878010);北京市重点实验室开放资助项目(编号:EESR2009-01)

摘　　要：基于传统有效独立法(effective independence algorithm,简称EI法),以测点的频响函数为驱动点留数加权有效独立分布向量,提出改进的有效独立法用于传感器优化布置。该方法弥补了传统有效独立法会得到振动能量较低测点的缺点,可针对位移、速度和加速度不同类型的传感器采用相应的频响函数分别进行优化布置。应用该方法对一座矮塔斜拉桥三向加速度传感器进行优化布置,并采用模态保证准则和抗噪声能力准则对布置方案进行评价,结果表明,改进有效独立法能得到精确、经济的传感器布置。Sensor placement is one of the key techniques for Health monitoring systems. Based on the effective independence algorithm, an improved effective independence is proposed, which takes each location's frequency response function as a weighting factor to update the effective independence method, and adopts different frequency response functions for corresponding sensors, such as displacement, velocity and acceleration. The new method concentrates sensor positions in high energy content regions, remedies defect of traditional effective independence. Then applying the promoted EI method, three dimensions sensor placement for an extradosed cable-stayed bridge is studied, and two criterions, modal assurance criterion and ability to withstand noise pollution criterion are employed. The Results show that the promoted EI method can provide an effective, economical method for optimal sensor placement.

关 键 词：斜拉桥 健康监测 频响函数 传感器优化 有效独立法 

分 类 号：U466.3[机械工程—车辆工程]