摘要
针对高速、高机动弹道导弹中捷联惯性导航系统/全球卫星定位系统(SINS/GPS)紧密组合导航系统在信息融合时,存在由于接收机时钟差引起量测信息值突变及量测数据时间同步的问题,提出了一种伪距差分的方法,能有效消除量测值的突变,保证滤波器收敛。在此基础上,采用多项式拟合外推的方法达到了时间同步精度要求。最后对改进后的系统进行静态和动态跑车实验,实验结果表明,该系统的水平位置精度达到了10 m,速度精度达到了0.2 m/s,提高了系统的导航精度,验证了该方法的有效性。
There exist some problems such as the measuring information mutation caused by the receiver clock difference and the time synchronization of measurement data during the information fusion of the strap--down inertial navigation system/global position system （SINS/GPS） closely integrated navigation system in practical engineering applications. For this reason, a pseudoTrange difference method has been proposed in this paper to effectively eliminate the mutation of the measured values and to make the filter converge to a valid value. On this basis, the use of polynomial fitting method of extrapolation can achieve the time synchronization accuracy. The static and dynamic sports car experiments on the improved SINS/GPS closely integrated navigation system have been carried out. The results showed that the horizontal position accuracy of 10 m and the speed accuracy of 0.2 m/s have been achieved in this system. The navigation accuracy of the system has been improved effectively by using this proposed method and the effectiveness of this method has also been validated.
出处
《压电与声光》
CSCD
北大核心
2011年第4期566-569,共4页
Piezoelectrics & Acoustooptics
关键词
捷联惯导系统
全球卫星定位系统
紧密组合导航
伪距差分
时间同步
strapdown inerlial navigation system
global position system
integrated navigation closely
pseudorange differential
time synchronization
