摘要
讨论了模态实验中传感器的配置问题。以模态置信度MAC矩阵的最大非对角元为目标函数,利用逐步削减法得到传感器的配置,并保留结构振型矩阵的QR分解得到的自由度,提出了传感器配置必须结合优化效果和经济性两方面综合考虑。以一座具有74个可测自由度的海洋平台为算例,采用逐步削减法得到了12个最优传感器位置,并与逐步累积法进行了比较。
A sensor placement algorithm is discussed. Taking the off-diagonal element of Modal Assurance Criterion (MAC) matrix as the target function, the optimal sensor locations are obtained by the reduced method proposed in this paper, including those free-degrees obtained by mode shape matrix QR decomposition. In addition, it is recommended that both the optimal result and economic benefit should be considered in sensor placement. This paper applies the method in an offshore platform with 74 measurable free-degrees. It is shown that only 12 optimal sensors locations are needed. Meanwhile it is compared with the cumulative method.
出处
《海洋工程》
CSCD
北大核心
2004年第1期32-36,45,共6页
The Ocean Engineering
基金
十五"863计划资助项目(2001AA602023)
国家自然科学基金资助项目(50179014)
高等学校博士学科点专项科研基金资助课题(200042302)
关键词
传感器
优化配置
模态置信度
海洋平台
sensor
optimal location
modal assurance criterion
offshore platform
