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Micro mechanical gyro denoising method based on improved wavelet threshold
Authors
刘晓光
李逃昌
+3 more
白晓平
胡静涛
高雷
Publication date
1 January 2014
Publisher
Abstract
陀螺的噪声是影响组合导航系统精度的重要因素之一。以插秧机GPS/INS组合导航系统为研究背景,在分析常规硬阈值和软阈值小波去噪的基础上,提出了一种改进的小波阈值去噪方法。该方法构造了一种改进的阈值函数,改进的阈值函数具有较好的连续性,避免了将混叠在噪声中的有效信号完全消除,能够自动调节小波系数的收缩程度,具有一定的自适应性。利用插秧机组合导航系统中微机械陀螺的实际输出数据,分别采用硬阈值、软阈值和改进阈值小波去噪方法进行了对比试验。结果表明改进的小波阈值去噪方法处理后信号的信噪比提高了约3倍、均方差小,具有一定的实用价值
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Shenyang Institute of Automation,Chinese Academy Of Sciences
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oai:ir.sia.cn/:173321/15102
Last time updated on 12/02/2018
Institutional Repository of Institute of Automation, CAS
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Go to the repository landing page
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oai:ir.sia.cn/:173321/15102
Last time updated on 29/11/2016