一种改进的TRIAD飞行器姿态确定方法

为了提高飞行器姿态测量精度和简化姿态确定的复杂性,提出了一种基于加权矢量和的TRIAD飞行器姿态确定算法。该算法基于TRIAD姿态确定原理,通过对观测矢量加权求和的方式以获得一个较传感器观测矢量更精确的矢量,并以此矢量作为TRIAD算法的基准矢量,然后运用TRIAD算法进行姿态计算。仿真结果表明,这种算法获得的飞行器姿态精度优于传统的TRIAD算法,与优化的TRIAD算法精度近似,但简化了姿态确定的过程,提高了姿态确定的速度。

Improved TRIAD Algorithm for Spacecraft Attitude Determination

To improve the spacecraft attitude determination accuracy and simplify the attitude determination process,an improved TRIAD algorithm based on weighted vector sum for spacecraft attitude determination was proposed. The new TRIAD algorithm adopts the vector which is weighted vector-sum of the observation vectors as the first vector,and the new weighted vector-sum vector is more accurate than any of the observation vectors. Then the attitude matrix was generated by TRIAD algorithm. Simulation results indicate that the improved TRIAD algorithm offers higher accuracy than the conventional TRIAD algorithm,and simplifies the attitude determination process with approximate accuracy compared with the optimized TRIAD algorithm.