一种新的圆锥误差优化补偿算法

A New Optimized Compensation Algorithm of Conic Error

为了解决捷联惯导系统中存在的不可交换误差的问题,本文提出了一种改进的圆锥误差优化算法来提高解算精度。该算法对重叠式圆锥误差优化算法进行了进一步优化。首先对经典圆锥运动建立误差准则,其次推导出优化的补偿算法的公式,给出了优化补偿系数,最后,在某一圆锥运动环境下对改进的算法进行仿真。结果表明,改进的算法得到的姿态解算精度与传统算法和重叠式算法相比,都得到了一定的提高,并且与二子样和三子样相比,四子样的解算精度效果最好。

In order to solve the noncommutative error existing in the strap down inertial navigation system, this paper presents an improved coning error optimization algorithm to improve the solution ac-curacy. The algorithm optimizes the overlapped optimization algorithm further. Firstly, the error criterion of the classical coning motion is established;secondly, the optimized formula of the compensation algorithm is deduced and the optimal compensation coefficient is obtained;finally, the optimized algorithm under different coning motion environment is simulated. The results show that attitude calculation accuracy through improved algorithm is better than the traditional algorithm and overlapping algorithm;what’s more, the calculation accuracy of four-sample is better than the two-sample and three-sample.