title: AMA- and RWE- Based Adaptive Kalman Filter for Denoising Fiber Optic Gyroscope Drift Signal.
abstract: An improved double-factor adaptive Kalman filter called AMA-RWE-DFAKF is proposed to denoise fiber optic gyroscope (FOG) drift signal in both static and dynamic conditions. The first factor is Kalman gain updated by random weighting estimation (RWE) of the covariance matrix of innovation sequence at any time to ensure the lowest noise level of output, but the inertia of KF response increases in dynamic condition. To decrease the inertia, the second factor is the covariance matrix of predicted state vector adjusted by RWE only when discontinuities are detected by adaptive moving average (AMA).The AMA-RWE-DFAKF is applied for denoising FOG static and dynamic signals, its performance is compared with conventional KF (CKF), RWE-based adaptive KF with gain correction (RWE-AKFG), AMA- and RWE- based dual mode adaptive KF (AMA-RWE-DMAKF). Results of Allan variance on static signal and root mean square error (RMSE) on dynamic signal show that this proposed algorithm outperforms all the considered methods in denoising FOG signal.
authors.affiliation: School of Instrument Science and Opto-Electronics Engineering, Beihang University, Beijing 100191, China. bhu17-yang@139.com.|Inertial Technology Key Laboratory of National Defense Science and Technology, Beihang University, Beijing 100191, China. bhu17-yang@139.com.
authors.forename: Gongliu
authors.initials: G
authors.lastname: Yang
authors.affiliation: School of Instrument Science and Opto-Electronics Engineering, Beihang University, Beijing 100191, China. liuyuanyuan1773@163.com.|Inertial Technology Key Laboratory of National Defense Science and Technology, Beihang University, Beijing 100191, China. liuyuanyuan1773@163.com.
authors.forename: Yuanyuan
authors.initials: Y
authors.lastname: Liu
authors.affiliation: School of Instrument Science and Opto-Electronics Engineering, Beihang University, Beijing 100191, China. liliyalm@buaa.edu.cn.
authors.forename: Ming
authors.initials: M
authors.lastname: Li
authors.affiliation: Beijing Institute of Spacecraft System Engineering, Beijing 100094, China. songshunguang@126.com.
authors.forename: Shunguang
authors.initials: S
authors.lastname: Song
keywords: Adaptive Moving Average (AMA); Fiber Optic Gyroscope (FOG); Kalman Filter (KF); Random Weighting Estimation (RWE)