Application of H_∞ filtering in the initial alignment of strapdown inertial navigation system

摘要

In this paper , the principle of H_∞ filtering is discussed and H_∞ filter is constructed, which is used in the initial alignment of the strapdown inertial navigation systems( SINS). The error model of SINS is derived. By utilizing constructed H_∞ filter, the filtering calculation to that system has been conducted. The simulation results of the misalignment angle are given under the condition of unknown noises. The results show that the process of alignment with H_∞ filter is much faster and with excellent robustness.