| 表面热流可辨识性初步分析 |
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| 引用本文： | 钱炜祺,周宇,邵元培,杨驰,黄建栋.表面热流可辨识性初步分析[J].气动实验与测量控制,2013(4):17-22. |
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| 作者姓名： | 钱炜祺 周宇 邵元培 杨驰 黄建栋 |
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| 作者单位： | [1]中国空气动力研究与发展中心空气动力学国家重点实验室,四川绵阳621000 [2]中国运载火箭技术研究院,北京100076 |
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| 基金项目： | 国家自然科学基金（10702076、11072258）; 空气动力学国家重点实验室基金（SKLA2009A0103） |
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| 摘 要： | 表面热流的可辨识性分析可用于飞行器防热层内温度测量精度和测温点位置的确定,在工程上有较强的实用意义。从无量纲分析和仿真辨识出发,根据防热层材料热物性系数、测点位置、表面热流的频域特性等参数对表面热流辨识结果的影响规律,总结出了表面热流辨识问题的相似参数：基于表面热流频率参数的傅立叶数。此后,以这一傅立叶数为判据,针对不同测量误差值的情况初步建立起了表面热流可辨识性的准则和分析方法。
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| 关 键 词： | 表面热流 可辨识性 傅立叶数 测量噪声 |
A preliminary analysis of identifiability of surface heat flux |
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| Authors: | QIAN Wei-qi ZHOU Yu SHAO Yuan-pei YANG Chi HUANG Jian-dong |
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| Institution: | 1.State Key Laboratory of Aerodynamics,China Aerodynamics Research and Development Center,Mianyang Sichuan 621000,China;2.China Academy of Launch Vehicle Technology,Beijing 100076,China) |
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| Abstract: | The analysis of identifiability of surface heat flux can be used to determine the location of the temperature sensor and its measurement accuracy for the TPS（Thermal Protection System）of flight vehicle,which is meaningful in engineering practice.In this paper,based on non-dimensionalization analysis and simulation of surface heat flux estimation,the influences of the thermal parameters of TPS material,the depth location of temperature sensor,and the spectrum characteristic of surface heat flux on the estimation result are collected and a special nondimensional parameter,the Fourier number corresponding on the period of surface heat flux,to scale the heat flux inversion problems is found.Moreover,this Fourier number is used as a criterion,and the rules of identifiability of surface heat flux under different measurement noise levels are developed. |
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| Keywords: | surface heat flux identifiability Fourier number measurement noise |
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