自适应数字滤波技术在光纤陀螺SINS中的应用  

Application of adaptive digital filtering technology in optical fiber gyro SINS

作　　者：于飞[1] 阮双双 

机构地区：[1]哈尔滨工程大学自动化学院,黑龙江哈尔滨150001

出　　处：《传感器与微系统》2014年第4期154-157,共4页Transducer and Microsystem Technologies

基　　金：高等学校博士学科点专项科研基金资助项目(20102304110021)

摘　　要：光纤陀螺捷联惯导系统(SINS)对外界环境极为敏感,系统的输出信号中含有复杂的高频随机噪声,此噪声将导致系统的长时间导航精度较差。要进一步提升导航系统的精度,必须使用更为有效的滤波技术对器件的输出噪声做处理。传统的数字滤波器采用先验固定截止频率,它往往与实际截止频率存在偏差。为了更加有效地消除器件的高频噪声,提出一种基于稳态隐马尔科夫模型卡尔曼滤波器(HMM/KF)的自适应数字滤波设计方法,并用此方法设计的自适应数字滤波器处理光纤陀螺的原始输出信号,从而高效滤除陀螺仪输出信号中的高频随机噪声。The output signal of optical fiber gyroscope strap-down inertial navigation system（SINS） contains high frequency random noise as the system is sensitive to its environment,thus yielding poor long-term narigation precision.To further improve navigation precision,more effective filtering technology is needed to process output noise of device.Traditional digital filter utilize the fixed cut-off frequency which will have a deviation to its real value.In order to eliminate high frequency noise of devices effectively,a filter design method which based on HMM/KF is proposed,and the adaptive digital filter designed by this method are utilized to process original output signal of optical fiber gyro,so high frequency noise of gyro is significantly eliminated.

关 键 词：捷联惯性导航系统 自适应数字滤波器 自适应截止频率 隐马氏卡尔曼滤波器 

分 类 号：U666.1[交通运输工程—船舶及航道工程]