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.
作者
周昊天
赵婕
曹为政
史晓鸣
于开平
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)
出处
《上海航天》
CSCD
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)
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
subspace tracking
thermo-mode
modal test
time-varying structure
modal parameter identification
novel information criterion
flight vehicle
rudder structure