Considering that estimation of post-fault redundant strapdown inertial navigation system, A strategy combining with accuracy and reliability for reconfiguration is proposed. Based on strategy, a method for estimation is proposed. Parity-check error is analyzed by time series analysis and Kalman filter. The result is used to compensate the reconfiguration output. The method analyzes the error of reconfiguration model instead of every single sensor. The simulation result verifies that the method has a strong adaptability and high precision when there is no measure information of sensors' noise.%对于单机十表冗余惯组故障后的重构估计,提出一种结合可靠性和精度的重构策略,基于该策略,提出一种在线重构估计方法,对在故障诊断中常用的校验方程残差进行分析;通过时间序列分析的方法确定噪声结构,用卡尔曼滤波对其进行在线估计,估计结果作为重构模型估计精度指标的评价;采用滤波补偿的方法对故障表进行分析计算,该方法绕过了对各轴传感器噪声的估计,直接对投影定理推导的重构模型误差进行分析.仿真结果表明,该算法对传感器精度未知的情况有较强适应性,并有较高精度.
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