激光陀螺惯导系统硬件增强角速率输入圆锥算法

根据机械抖动式激光陀螺捷联惯性系统的角速率以及角增量输出原理,提出了一类利用角速率及其硬件积分角增量输入的新圆锥误差补偿算法,即硬件增强角速率输入圆锥算法.在分析经典圆锥运动误差基础上,给出了新算法的旋转矢量通式,并推导了这类圆锥补偿基本算法及其优化算法补偿系数通式.对新算法误差主项和补偿系数的规律性分析以及进一步的仿真结果表明,硬件增强角速率输入算法具有较高的精度,是提高角速率输出捷联惯导系统姿态算法精度的一种新思路.

Coning algorithm with hardware-enhanced angle rate of RLG SINS

A hardware-enhanced angle rate algorithm is put forward.It is a new coning algorithm with ring laser gyro(RLG) angle rate and hardware-integrated angle increment according to the operation principle of mechanically dithered RLG angle rate and angle increment.Associated with the analysis of the new algorithm in pure coning environment,general expression of rotating vector in the new algorithm is given,and the basic and optimized algorithm of the new coning compensation algorithm are deduced.The analysis of residual error coefficients,cross-product coefficients' regularity and the further simulation result indicate that the hardware-enhanced angle rate algorithm has higher precision and can be a new idea to improve the attitude accuracy of the strapdown inertial navigation system.