引力波探测中的超低频热噪声传递特性分析  

Transmission Characteristics of Ultra-low Frequency Thermal Noise in Gravitational Wave Detection

作　　者：亢佳贺 陈华[1] 赵锐 杨昌鹏[3] 赵欣[3] 宋云飞 程文龙[1] KANG Jiahe;CHEN Hua;ZHAO Rui;YANG Changpeng;ZHAO Xin;SONG Yunfei;CHENG Wenlong(Department of Thermal Science and Energy Engineering,University of Science and Technology of China,Hefei 230027,China;School of Automotive and Transportation Engineering,Hefei University of Technology,Hefei 230009,China;National Key Laboratory of Spacecraft Thermal Control,Beijing Institute of Spacecraft System Engineering,Beijing 100094,China)

机构地区：[1]中国科学技术大学热科学和能源工程系,合肥230027 [2]合肥工业大学汽车与交通工程学院,合肥230009 [3]北京空间飞行器总体设计部航天器热控全国重点实验室,北京100094

出　　处：《航天器工程》2023年第6期31-38,共8页Spacecraft Engineering

摘　　要：建立了基于温度振幅谱密度的低频温度噪声传递模型,并通过实验验证了模型的准确性,通过该模型研究低频热流条件下,热源频谱特性以及热控材料的厚度对温度噪声传递的影响。研究结果表明:随噪声频率的增加,经过被动热控材料抑制的温度噪声逐渐降低,并最终基本保持不变,说明在文章提供的材料条件下,超过0.17 Hz时适合用被动热控材料进行温度噪声抑制,低于0.17 Hz时需要采用主动热控方法进行抑制;随被动热控材料厚度的增加,温度噪声的对数线性降低,对于超低频温度噪声需要采用更厚的热控材料,从节省空间资源的角度,超低频温度噪声更适合用主动热控方法进行抑制。In this paper,a low-frequency temperature noise transmission model based on temperature amplitude spectral density has been established,and the accuracy of the model is verified by experiments.The model can be used to study the influence of the spectral characteristics of heat source and the thickness of thermal control materials on the temperature noise transmission under low frequency heat flow condition.The research results show that the temperature noise gradually decreases and eventually remains basically unchanged with the increase of noise frequency,indicating that under the material conditions provided in this paper,the passive thermal control material is suitable for temperature noise suppression above 0.17 Hz,and the active thermal control method is necessary for temperature noise suppression below 0.17 Hz.With the increase of the thickness of the passive thermal control material,the logarithm of the temperature noise decreases linearly.For the ultra-low frequency temperature noise,thicker thermal control material is needed.In order to save space resources,the ultra-low frequency temperature noise is more suitable for active thermal control method to suppress.

关 键 词：引力波探测 温度噪声 被动热控 频谱特性 

分 类 号：V444.3[航空宇航科学与技术—飞行器设计]