惯导系统的导航精度随着导航时间的增加而增加,其中惯性测量元件是影响惯导系统的主要因素。旋转调制技术能够在现有惯性元件精度的条件下大幅提高系统导航性能,是提高惯导系统长时间导航精度的主要方法之一。文中在国产平台式标准惯导系统的基础上,通过改进算法和方位施矩回路,将由惯性测量元件水平方向上随时间发散误差量调制为常值误差,并通过阻尼进行消除,从而实现系统的高精度性能。仿真和试验验证结果表明,文中所设计的系统达到了预期的目的,具有较好的实用价值。

The error of the inertial navigation system increases with navigation time, and inertial sensor is the main factor affecting the system precision. The revolution modulating technology can greatly improve the system precision under the condition that the inertial sensor keeps its original precision, and it is the main method for improving long time navigation precision of the inertial navigation system. On the basis of the domestic standard platform inertial navigation system, in the paper, the system algorithm and the azimuth matrix loop were improved, the errors diverging with time caused by the horizontal inertial measure unit were modulated as the constant errors. These constant errors can be eliminated by damping, and the precision of the inertial navigation system will be improved. The result of the simulation and experiment shows that the system designed by the authors meets the desired destination and have a good practice value.