捷联惯导系统在运动基座上的建模及误差传播特性研究

Modeling and Error Spreading Speciality of Strapdown Inertial Navigation System on Moving Base

捷联惯导系统(SINS)在导航制导领域占有愈来愈重要的地位,尤其在各类导弹武器系统中得到广泛应用。基于机载武器的特点,推导了SINS在动基座条件下系统及惯性元器件的误差传播方程,建立了SINS在运动基座上系统的误差状态模型。研究了SINS各主要误差因素对安装在运动基座上武器系统导航误差的传播特性,定量地得到了其对SINS导航精度的影响程度,并进行了仿真试验。研究结果可为机载武器SINS的工程设计提供理论参考作用。

The Strapdown Inertial Navigation System （SINS） has held more and more important status in the navigation and guidance of weapon systems at present, and especially has been widely used to all kinds of guided missile systems. In this paper, based on the request of how to improve navigation precision of weapon systems mounted on aerocrafts, the error differential equation of SINS and inertial apparatus had been established on moving base, and the integrated error state equation of SiNS had been founded on moving base. The dominating error elements which effecting the performance of SINS had been analyzed in detail, and the quantificational analyzing conclusions had been gained. The simulating experiments had been done. The study results could offer academic basis for designing of SINS.