GPS/IMU/DMI integrated high-precision positioning approach

摘要

This paper presents a new method for improving the accuracy of GPS/IMU/DMI integrated high-precision positioning system mounted on land vehicles. The system comprises a Position and Orientation System (POS) Computer System, an Inertial Measurement Unit (IMU), a Distance Measuring Indicator (DMI) and two Global Positioning System (GPS) antenna. The system provides continuous and accurate vehicle position and orientation information through areas of poor or no Global Positioning System (GPS) service. The relation among vehicle frame, reference frame, IMU frame and DMI frame are very important, a GPS/IMU/DMI integrated high-precision positioning approach is introduced in this paper to efficiently measure and calibrate these relations in order to improve the precision of system. Accurate measurements of the position parameters are necessary to ensure optimum GPS/IMU/DMI integrated position performance. At first, paper introduces several professional nouns, then brings forward Seven sets of parameters should be measure in this system. At last, a testing Vehicle has been designed to testing the availability, feasibility, and veracity of system. The result indicate that we can improve the precision of GPS/IMU/DMI integrated high-precision positioning system not only through ameliorating arithmetic ,but also using system project idea.