GPS组合导航系统的数据融合

首先介绍了车载GPS加上DR组合导航系统的设计,建立了车辆加速度及影响组合导航系统定位精度的主要误差的数学模型.然后针对一般组合滤波算法中,由于DR系统误差的引入,导致滤波效果不好的问题,提出了一种组合导航系统的数据融合.对车载GPS/DR组合导航系统提供的实际数据的处理结果表明,该方法既能提高GPS定位精度,又能有效控制DR系统的误差发散,从而有效地消除了一般组合滤波算法中DR系统误差对滤波器的影响,大大提高了组合系统的完整性和可靠性.令GPS在如香港交通环境:道路狭窄且多弯、交叉线多且密集、街道两侧高楼林立、桥梁多且较密集、隧道多且长、地形类似丘陵且高山较多,而且车辆也多行驶速度又快的情形下变得可行.

Data Fusion of GPS Integrated Navigation System

In this paper, the use of GSM Short Message method incorporating GPS system vehicle guidance is discussed and a mathematical model is founded to represent the acceleration and main error which affects the GPS/DR integrated system position accuracy. A data fusion algorithm of integrated system is introduced to improve the accuracy of the navigation system. Since the dead reck-oning( DR) technique is being used in the system, this algorithm is not only improving the GPS position accuracy but also preventing the error of the DR to be diversified. The method has made the integrated system to be robust and reliable in an environment with a lot of tall buildings, tunnels, bridges and mountains like Hong Kong.