位置修正技术在航位推算中的应用

利用图解法证明了航位推算轨迹和真实轨迹相似,符合相似性原理,并通过图解法推导位置修正公式;将位置修正技术用于里程仪的初始标定,经实测数据证明标定后的航向安装偏差角、俯仰安装偏差角及里程仪刻度系数误差大幅减小;将位置修正技术与GPS结合进行GPS/DR组合导航,经Matlab仿真证明该组合导航在长距离行车可将航向误差角限制在3.6′之内;该修正技术具有较高的实际应用价值。

Application of Position Correction Technology in Dead Reckoning

The dead reckoning trajectory and real trajectory are similar,and they are in line with the principle of similarity.The similarity is proved by Graphic method used to derive the position correction formula.The position correction technology is applied to the initial calibration of odometer,and the measured data proves that the calibrated heading installation deviation angle,pitch installation deviation angle and the scale factor error of odometer decrease significantly.The position correction technology and GPS are assembled as GPS / DR integrated navigation,and the simulation by Matlab shows that the heading error can be limited to the range of less than 3.6’ in the long-distance navigation of vehicle.The correction technique has a high practical value.