摘要
为了解决高速飞行环境下卫星导航信息滞后严重影响导航精度和性能的问题,研究了一种基于曲线拟合技术的滞后补偿方法。针对高速飞行环境下导航参数的变化情况,分别采用抛物线和三次抛物线来拟合卫星导航系统的输出信息,推导获得抛物线和三次抛物线的各项系数,进而研究获得卫星导航信息滞后的补偿算法。仿真结果表明,尽管卫星导航输出的滞后时间长达0.8 s,采用该滞后补偿方法可以使捷联惯导/卫星组合导航的水平位置精度达到±0.6",高度精度达到±18.9 m,速度精度达到±0.15m/s。因此该方法能够有效补偿卫星导航系统的输出滞后,具有良好的工程应用前景。
In order to solve the problem that the delay of satellite navigation information seriously influences the navigation precision and performance in high-speed flight environment,a method for compensating the delay is studied by the curve fitting technology.According to the change features of navigation parameters in high-speed flight environment,the parabola and cubic parabola are taken to fit the output information of satellite navigation system,and the polynomial coefficients of the parabola and cubic parabola are deduced.Thus the compensation algorithm for satellite navigation information delay is obtained.Simulation results show that,although the delay time of satellite navigation output is up to 0.8 s,however,after delay compensation by this method,the horizontal position and altitude accuracy of SINS/ satellite integrated navigation reaches ±0.6＂ and ±18.9 m respectively,and the velocity accuracy reaches ±0.15 m/s.So this method can compensate the output delay of satellite navigation system effectively,and has good engineering application prospect.
出处
《中国惯性技术学报》
EI
CSCD
北大核心
2011年第3期293-297,共5页
Journal of Chinese Inertial Technology
基金
中国博士后科学基金(20090461471)
关键词
高速飞行
卫星导航
滞后补偿
曲线拟合
抛物线
high-speed flight
satellite navigation
delay compensation
curve fitting
parabola
