MA Qun, WANG Qing, YANG Yuan, et al. Random error identification and suppression of MEMS gyroscope based on Allan variance[J]. 2019, (6): 62-65. DOI: 10.13873/J.1000-9787(2019)06-0062-04.
To improve the output precision of a certain type of micro-electro-mechanical system( MEMS)gyroscope
the raw data of the MEMS gyroscope are acquired in static state. The Allan variance analysis method is applied to identify the components of random errors of the gyroscope. An auto-regressive and moving average( ARMA) model of z axis output is built by time series analysis method. Kalman filter is designed based on fitted model parameters to process the raw data
after which
the Allan variance analysis is performed on the pre-filtered data. The result shows that the error coefficients of quantization noise( QN)
angular random walk( ARW) and bias instability( BI) decrease by 2. 8 %
19. 8 % and 8. 1 % respectively
Kalman filter can restrain random errors of MEMS gyroscope and improve its precision effectively.