摘要
通过误差分析的方法，给出了用卫星全球定位系统ＧＰＳ的位置、速度信息作为观测量的ＧＰＳ／ＤＮＳ组合导航系统的数学模型。在此模型的基础上应用卡尔曼滤波器，估计出导航参数误差并对系统进行校正，从而实现了ＧＰＳ与多普勒导航系统（ＤＮＳ）的组合。ＧＰＳ／ＤＮＳ组合导航系统克服了多普勒导航系统定位误差随时间发散的缺点，使得导航精度与时间无关，弥补了ＧＰＳ实时性的不足。仿真结果表明，该组合方案可获得高的导航定位精度。该系统丰富了组合导航系统内容，且体积小、成本低，便于工程实现，具有实用价值。
Presents an error model of the GPS/DNS Integrated Navigation System (INS) using position and velocity observation of the Global positioning System (GPS) based on theanalysis of the error. The error of navigation parameters is estimated by using a Kalman filterof this model to correct the navigation system,enabling to integrate GPS with DNS. GPS/DNSintegrated navigation system:remedies the defect of the divergence of DNS'S position information and GPS'S bad real--time performance. Simulation results show that high positioning precision is gained. It is easy to use this system in engineering practice. The system is small in volume,low in price and valuable in application.
出处
《南京航空航天大学学报》
EI
CAS
CSCD
1996年第1期66-73,共8页
Journal of Nanjing University of Aeronautics & Astronautics
关键词
导航系统
卫星导航
GPS
DNS
navigation systems
navigation sets
satellite navigation
positioning
Doppler navigation
