To improve the carrier-born aircraft's viability and the shooting percentage of airborne missile, the initial alignment of INS in carrier-born aircraft must be finished accurately and quickly. The transfer alignment is always used to solve the problem of initial alignment due to the influence of complex marine environment and many interference factors. In this paper, the transfer alignment of large azimuth misalignment was studied, and the nonlinear error model of velocity plus attitude matching was established. Then the transfer alignment algorithm of large azimuth misalignment based on the UKF was designed. The simulation results show that the maneuver manners make no difference on transfer alignment of carrier-born aircraft in moderate sea state, and by using different filter frequencies of UKF, the transfer misalignment error at 20 Hz is about half of that at a lower frequency.%新伽利略系统计划提供E1、E5和E6导航信号服务于民用导航、商业服务和生命安全服务领域,预计导航性能将大幅提升.本文旨在设计一种基于软件的伽利略E1/E5/E6中频信号发生器以模拟未来的伽利略导航系统.首先简要概述了伽利略信号及其在无线电频段的分布,包括E1、E5和E6信号的信号结构和特点.然后对仿真系统的组成进行了详细描述并通过Matlab软件进行仿真,重点分析了所有导航信号的功率谱密度(PSD).结果表明该仿真系统可为伽利略接收机的设计和测试提供可控信号源.
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