Research on Noise of MEMS Gyroscopes Based on Wavelet Entropy
Xizheng Ke · Journal of Xi'an University of Technology · 2010
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.