子空间跟踪算法在热模态问题中的应用研究  

Application of Subspace Tracking Algorithm in Thermo-Mode Identification

作　　者：周昊天[1] 赵婕 曹为政 史晓鸣 于开平[1] ZHOU Haotian;ZHAO Jie;CAO Weizheng;SHI Xiaoming;YU Kaiping(School of Astronautics,Harbin Institute of Technology,Harbin 150001,Heilongjiang,China;College of Computer and Information Engineering,Heilongjiang University of Science and Technology,Harbin 150022, Heilongjiang,China;Shanghai Electromechanical Engineering Institute,Shanghai 201109,China)

机构地区：[1]哈尔滨工业大学航天学院,黑龙江哈尔滨150001 [2]黑龙江科技大学计算机与信息工程学院,黑龙江哈尔滨150022 [3]上海机电工程研究所,上海201109

出　　处：《上海航天》2018年第4期85-90,共6页Aerospace Shanghai

基　　金：国家自然科学基金(11372084);上海航天科技创新基金(SAST2015012)

摘　　要：总结子空间跟踪算法识别模态参数的一般步骤。对一个有理论参考解的时变两自由度系统进行仿真,利用添加不同量级噪声的响应数据对系统进行辨识。辨识结果表明:基于新信息准则的子空间跟踪算法拥有较好的抗噪能力。对飞行器舵面结构进行受控快速加热,辨识快速升温过程中的模态参数。辨识结果表明:子空间跟踪算法可用于热模态辨识,有一定的工程应用价值。The general procedure of modal parameter identification by use of subspace tracking algorithm is reviewed in this paper.A two degree-of-freedom spring-mass model with theoretical reference solution is simulated.In order to evaluate anti-noise abilities of different algorithms,the simulation acceleration responses with factitiously added random noise are used for identification.The identified results show that the anti-noise ability of subspace tracking algorithm based on novel information criterion(NIC)is better compared to other three methods.The thermo-modal test with controlled heating procedure for a rudder is carried out.The identification results show that the subspace tracking algorithm is suitable for thermo-modal analysis.

关 键 词：子空间跟踪 热模态 模态试验 时变结构 模态参数辨识 新信息准则 飞行器 舵面结构 

分 类 号：TB123[理学—工程力学] N945.14[理学—力学]