| 基于热敏电阻的气体温度测量误差分析 |
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| 引用本文： | 李泽,边炳秀,马云华.基于热敏电阻的气体温度测量误差分析[J].空间控制技术与应用,2011,37(2):33-37,59. |
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| 作者姓名： | 李泽 边炳秀 马云华 |
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| 作者单位： | 1. 北京控制工程研究所,北京,100190
2. 中国空间技术研究院通信卫星事业部,北京,100094 |
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| 摘 要： | 挤压气体内部温度的精确测量对确定贮箱内推进剂剩余量和提高氧化剂和燃烧剂的混合比控制精度有重要意义.提出了一种基于热敏电阻的矢量测温方法,通过测量气瓶壁面温度推算气体内部真实温度,分析温度电阻非线性特性、温度—电压处理电路、A/D采样非线性等因素导致的温度测量误差,最终获得系统自身的温度采集误差,在此基础上分析了影响此误差的主要因素.最后分析了外界干扰引起的测量噪声对温度测量的影响,并采用小波降噪的方法对此进行降噪处理,使温度测量精度得到较大改善,并最终确定了内部气体温度的测量误差.
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| 关 键 词： | 矢量测温 温度误差分析 小波降噪 |
Error Analysis for Gas Temperature Measurement Based on the Thermistor |
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| LI Ze,BIAN Bingxiu,MA Yunhua.Error Analysis for Gas Temperature Measurement Based on the Thermistor[J].Aerospace Contrd and Application,2011,37(2):33-37,59. |
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| Authors: | LI Ze BIAN Bingxiu MA Yunhua |
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| Institution: | LI Ze1,BIAN Bingxiu2,MA Yunhua1(1.Beijing Institute of Control Engineering,Beijing 100190,China,2.Institute of Telecommunication Satellite,China Academy of Space Technology,Beijing 100094,China) |
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| Abstract: | Accurate temperature measurement of the pressurant gas is important,to determine residual propellant in propellant tanks and improve control accuracy of oxidizer to fuel mixture ratio.A thermistor based gas temperature measurement is proposed by measuring temperature of tank wall acquiring the true temperature of the pressurant gas.And,then by analyzing factors such as temperature-thermistor nonlinear characteristics,temperature-voltage processing circuit,A/D acquisition nonlinear characteristics resulting ... |
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| Keywords: | vector temperature measurement analyzing of temperature measurement error wavelet de-noising |
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