摘要
分别运用有效独立法(EI)和MAC法对带悬臂的简支梁进行了传感器的优化布置,对比研究表明同一种方法,不同的监测目标得到的传感器的位置不同;不同种方法,相同的监测目标得到的传感器位置也不同。EI法随着测点数的减少Fisher矩阵的行列式值和2范数呈单调递减,而条件数则无规律。采用列主元QR分解的MAC法解决了初始测点,最大可能的保证了测量向量的正交性,候选添加测点的确定可以根据可视性、振型匹配及重点模态加强监测的需要而定。
EI method and MAC method are used to optimize the sensor location,respectively.The research results show that different monitoring object using same method leads to different sensor placement,and the same monitoring object with different method also leads to different sensor placement.For EI method,with the decreasing of measured point,the value and the norm of Fisher matrix also decrease while condition varies irregular.Based on QR column decomposition,the initial measured point of MAC method is decided,and it can protect the orthogonal of measured vector as possible as it can.it is recommended that candidate added points should be deter mined by the needs of the visibility of measured shape,shape pair and some vital shapes monitoring.
出处
《工业建筑》
CSCD
北大核心
2008年第z1期344-347,343,共5页
Industrial Construction
基金
江苏省交通科学计划研究项目(03y031)
