| 天线反射对混波室场均匀性校准的影响 |
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| 引用本文： | 周香,蒋全兴,何鹏. 天线反射对混波室场均匀性校准的影响[J]. 测控技术, 2010, 29(1): 100-102 |
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| 作者姓名： | 周香 蒋全兴 何鹏 |
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| 作者单位： | 西北工业大学自动化学院; |
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| 基金项目： | 国家自然科学基金资助项目(50607001) |
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| 摘 要： | 摇摆状态下的捷联惯导初始对准,由于动基座情况下干扰较大,造成对准精度下降。推导了大失准角误差模型,设计了相关的H∞滤波器和Kalman滤波器,并比较了二者的性能。通过静基座和摇摆动基座初始对准仿真试验分析,得出静基座条件下,Kalman滤波性能较好;而在外界干扰较大或系统模型不准确的环境中,Kalman滤波性能恶化,H∞滤波的对准精度优于Kalman滤波,且实时性好,适合于工程应用。
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| 关 键 词： | 初始对准 大失准角 H∞滤波器 Kalman滤波器 |
Influences of Antenna Reflection on the Field Uniformity Calibration of Reverberation Chamber |
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| LIU Yu,LI Sui-lao,WEI Liang. Influences of Antenna Reflection on the Field Uniformity Calibration of Reverberation Chamber[J]. Measurement & Control Technology, 2010, 29(1): 100-102 |
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| Authors: | LIU Yu LI Sui-lao WEI Liang |
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| Affiliation: | School of Automation;Northwestern Polytechnical University;Xi'an 710129;China |
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| Abstract: | Field uniformity is the important property index of reverberation chambers (RC),and its calibration is influenced by antenna reflection.The relation between experiential lowest useable frequency (LUF) of RC and its volume is analyzed.To decrease the LUF,the cost will increase by increasing the volume.Then,the procedure of field uniformity calibration of RC is introduced.At last,it is concluded that the stirring of RC stirrer affects the voltage standing wave ration (VSWR) antenna through experiment,which results in that the normalized standard deviation of field strength varies with the normalizing factor,even that the LUF is influenced. |
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| Keywords: | initial alignment large misalignment angle Kalman filter |
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