基于小波熵对微机电陀螺仪中噪声的研究  

Research on Noise of MEMS Gyroscopes Based on Wavelet Entropy

作　　者：任亚飞[1] 柯熙政[1] 

机构地区：[1]西安理工大学自动化与信息工程学院,陕西西安710048

出　　处：《西安理工大学学报》2010年第2期156-160,共5页Journal of Xi'an University of Technology

基　　金：国家自然科学基金资助项目(60977054);国防重点实验室基金资助项目(9140C3601010701);陕西省自然科学基金资助项目(2007F12);陕西省教育厅科技专项基金资助项目(07JK332)

摘　　要：多尺度熵可以用于描述时间序列在不同时间尺度上的无规则程度,基于小波的多尺度分解,提出一种用小波熵对微机电陀螺仪噪声分析的方法。通过分析微机电陀螺仪中不同噪声的功率谱特性,从理论上验证了典型的白噪声和1/f噪声的存在,并对白噪声和1/f噪声的小波熵计算公式进行了推导。结合实验对设计方案进行了性能测试,根据微机电陀螺仪的实测数据,描述了小波熵随尺度变换的特性。实验结果为现有微机电陀螺仪的噪声分析提供了一种新的方法,并从理论和实际的角度共同验证了小波熵的准确性和适用性。As the multi-scale entropy can be used to describe the level of non-rules to the time series at the different time scales,based on the multi-scale decomposition of wavelet,this paper proposes a method to analyze noise of MEMS（Micro-Electro-Mechanical System） gyroscope using wavelet entropy.At first,power spectral characteritics is analyzed for the different MEMS gyroscope noise,and the presence of white noise and 1/f noise are verified in theory.And then,the wavelet entropy formula of white noise and 1/f noise are derived.Based on performance testing to the experimental design programs,the wavelet entropy characteritics are described by the measured data of MEMS gyroscopes.This paper provides a new approach to analysis noise of MEMS gyroscope,and validates the accurateness and applicability of the wavelet entropy from both theoretical and practical angles.

关 键 词：小波熵 微机电陀螺仪 1/f噪声 

分 类 号：TP274[自动化与计算机技术—检测技术与自动化装置]