航位推算法在导航定位中的仿真研究

Research on simulation of dead reckoning in navigation and location

航位推算(DR)法最初用于船舶的航行定位中,所使用的加速度计、磁罗盘、陀螺仪成本高.尺寸大。而随着微机电系统技术的发展,加速度计、数字罗盘、陀螺仪尺寸、重量、成本都大大降低,使得其可以在行人导航中得以应用。针对DR算法的原理,利用GPS/INS紧密组合导航系统INS 1200进行导航实验,采集实时数据,利用DR算法以及坐标转换算法对实验数据进行处理,通过MATLAB软件模拟了经过坐标变换后的定位图。仿真结果表明,DR算法在短时间内有较高的导航精度,对短时间导航有较大意义。

The dead reckoning was originally used for ship positioning in sailing,the cost of the used accelerometer,magnetic compass and gyroscope is high and those size is big.With the development of MEMS technology,the size,weight and cost of accelerometer,digital compass and gyroscope are greatly reduced.So it can be applied in pedestrian navigation.According to the principle of the dead reckoning.GPS/INS tightly integrated navigation system INS 1200 can be ued to conduct navigation experiment,collect real-time data.Experimental data is solved according to the dead reckoning and coordinate transformation algorithm.The positioning maps after coordinate transformation are simulated by MATLAB.The simulation result shows that the dead reckoning owns higher navigation accuracy in short time.There is greater significance for navigation in short time.