在现代飞行器制导系统的研制和定型过程中 ,精度仿真已经成为一种必不可少的重要技术手段。本文根据伴随系统理论 ,在某飞行器制导工具误差的精度评定中加以实际应用 ,求出落点偏差的协方差矩阵。试验表明 ,该仿真方法可以提高仿真试验效率 ,便于对制导系统性能进行广泛的分析研究。 In modern aircraft guidance system development and setting process, the precision simulation has become an indispensable important technical means. According to the concomitant system theory, this paper applies it to the accuracy assessment of the guidance tool error of an aircraft and obtains the covariance matrix of the landing bias. Experiments show that the simulation method can improve the simulation test efficiency and facilitate the extensive analysis of the performance of the guidance system.