子空间跟踪算法在热模态问题中的应用研究
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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.
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.
引文
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[12]余艳辉,李书,王远达.热环境下的金属热防护系统的动力学特性研究[J].振动、测试与诊断,2013,33(增刊1):171-175,229.
[13]苏华昌,骞永博,李增文,等.舵面热模态试验技术研究[J].强度与环境,2011,38(5):18-24.
[14]杨凯,于开平,白云鹤.基于信号时频分析理论识别时变模态参数实验[J].振动、测试与诊断,2015,35(5):880-884,991.
[15]李宇峰,贺利乐,张璇,等.典型热防护壁板结构的热模态分析[J].应用力学学报,2017,34(1):43-49.
[2]雷延花,徐敏,陈士橹.高超音速飞行器气动加热计算[J].上海航天,2001,18(5):10-13.
[3]刘川,彭仁军,郑科宇,等.挠性卫星模态参数辨识技术研究[J].上海航天,2016,33(2):39-42.
[4]吴洪波,李晓冬.气动加热参数辨识在型号设计中的应用[J].上海航天,2003,20(6):24-27.
[5]吴日强,于开平,邹经湘.改进的子空间方法及其在时变结构参数辨识中的应用[J].工程力学,2002,19(4):67-70,89.
[6]庞世伟,于开平,邹经湘.用于时变结构模态参数识别的投影估计递推子空间方法[J].工程力学,2005,22(5):115-119.
[7]庞世伟,于开平,邹经湘.用于时变系统辨识的自由响应递推子空间方法[J].振动工程学报,2005,18(2):233-237.
[8]杨凯,于开平,刘荣贺,等.两种新的基于子空间跟踪的时变模态参数快速辨识算法[J].工程力学,2012,29(10):294-300.
[9]倪智宇,谭述君,吴志刚.改进的TW-API方法及其在时变模态参数辨识中的应用[J].振动工程学报,2015,28(5):721-729.
[10]倪智宇,邬树楠,吴志刚,等.利用改进TW-API方法在轨辨识挠性航天器时变模态参数[J].宇航学报,2015,36(7):769-776.
[11]MIAO Y,HUA Y.Fast subspace tracking and neural network learning by a novel information criterion[J].IEEE Transactions on Signal Processing,1998,46(7):1967-1979.
[12]余艳辉,李书,王远达.热环境下的金属热防护系统的动力学特性研究[J].振动、测试与诊断,2013,33(增刊1):171-175,229.
[13]苏华昌,骞永博,李增文,等.舵面热模态试验技术研究[J].强度与环境,2011,38(5):18-24.
[14]杨凯,于开平,白云鹤.基于信号时频分析理论识别时变模态参数实验[J].振动、测试与诊断,2015,35(5):880-884,991.
[15]李宇峰,贺利乐,张璇,等.典型热防护壁板结构的热模态分析[J].应用力学学报,2017,34(1):43-49.