基于MAC法的空间太阳能电站传感器优化配置与参数辨识  

Optimal sensor placement and parameter identification of space solar power station based on MAC method

作　　者：张宇航 倪智宇 ZHANG Yu-hang;NI Zhi-yu(College of Aerospace Engineering,Shenyang Aerospace University,Shenyang 110136,China)

机构地区：[1]沈阳航空航天大学航空宇航学院,沈阳110136

出　　处：《沈阳航空航天大学学报》2022年第2期28-38,共11页Journal of Shenyang Aerospace University

基　　金：辽宁省自然科学基金(项目编号:2021-MS-267);辽宁省教育厅青年基金(项目编号:JYT19033)。

摘　　要：针对空间太阳能电站这类具有大尺寸、低刚度、频率密集等特点的大型航天结构,研究相应的振动传感器布置问题。基于模态置信法(Modal Assurance Criterion,MAC),参考Fisher信息阵、模态置信度准则等评价指标对这类超大空间结构进行传感器的优化配置,并将该方法与有效独立法(Effective Independence,EI)和模态动能法(Modal Kinetic Energy,MKE)这两种经典的优化配置方法所得的传感器布置方案进行比较,以寻找针对该类大型航天结构的传感器配置问题的最优解决方案。结果证明MAC法计算所得的传感器布点位置与EI和MKE方法相比,拥有更好的模态区分度,并且测点分散,利于减小配置冗余性。此外在仿真计算中还基于上述的优化配置结果,利用特征系统实现方法(Eigensystem Realization Algorithm,ERA)进行模态参数的辨识,计算结果证明基于MAC法所得的传感器布置方案具备良好的参数识别能力,适用于空间太阳能电站参数辨识的输出信号获取。Vibration sensors placement of space solar power station,which has a feature of large size,low stiffness and dense frequency,was studied.Based on modal assurance method(MAC),optimal sensor placement scheme for large space structure was carried out according to Fisher information matrix,modal confidence criterion and other evaluation indexes.Moreover,optimal solution of sensor placement problem of the large space structure was determined by comparing to the calculation results from MAC,effective independence(EI)approach and modal kinetic energy(MKE)method.The results show that the sensor location calculated by MAC method has a better modal distinction compared to that of EI and MKE.Measurement points were scattered to reduce redundant configuration.Eigensystem realization algorithm(ERA)was used to identify modal parameters based on the aforementioned optimal results.The calculation results illustrate that the sensor placement scheme from MAC method had a good ability in parameter identification,which was suitable for output signal acquisition during parameter identification of space solar power station.

关 键 词：传感器优化配置 模态置信法 评价准则 空间太阳能电站 参数辨识 

分 类 号：V211[航空宇航科学与技术—航空宇航推进理论与工程]