模糊抗干扰传递对准技术研究

针对机动过程中的机载捷联惯导系统(Strapdown Inertial Navigation System,SINS)进行抗干扰传递对准技术研究。建立了机载SINS传递对准误差模型,设计了一种顾及系统误差的模糊抗干扰传递对准方法。在滤波估计过程中引入模糊理论,对观测向量及状态预测向量的协方差阵进行估计。利用修正后的观测向量和状态预报向量及相应的协方差阵进行导航滤波计算,以克服机动过程引起的干扰。仿真结果表明,该算法得到的系统状态估计精度明显提高,为研究SINS快速、精确传递对准奠定了理论基础。

Research of the Transfer Alignment Technology for Fuzzy Anti-interference

According to the different maneuvering characteristics of airborne flight process, made a research on anti-interference transfer alignment research for Strapdown Inertial Navigation System (SINS). An error model of transfer alignment for airborne SINS was established, designing a fuzzy anti-interference transfer alignment method which considering the influence of systemic model error. The fuzzy theory was introduced in filtering estimate process, and made use of fuzzy theory to estimate the covariance matrix of observation and state prediction vector. The observations and the predicted states are then modified. It is shown by the calculation and simulation results that the algorithm, can in some resist the interference which is caused by the maneuvering process, and laying a theoretical foundation for the research of fast and accurate transfer alignment for SINS.