Estimation of Various Noise Factors from Allan Variance by Subsection Method
Zhang Gui-cai · Piezoelectrics and Acoustooptics · 2009
We found that the estimation of various kinds of fiber optic gyro noise factors from Allan variance by using the least square fitting method has some problems.The subsection method was brought forward to estimate errors from Allan variance and several sets of gyro data have been analyzed.The analyzed result showed that the subsection method was more effective and scientific than the least square fitting method.In addition,an algorithm which can change the integral time of Allan variance automatically based on the length of consecutive data points was proposed.Using this method can reduce some unimportant calculations and shorten Allan variance calculating time effectively,as well as guarantee Allan variance calculating and noise estimating precision.