Research On BeiDou/SINS Integrated Navigation System

BeiDou Navigation System is the GNSS system planned by China, client of Asiapacific can be serviced on2012. It is precision and low cost, more and more application willbe developed in pace with its construction. Because of its characteristics of goodconcealment, high reliability and strong self-working, Inertial Navigation System (INS) iswidely used on military field and absolutely necessary. But INS has its intrinsic limitation,for example, high cost and error accumulation. Therefore a major direction of thedevelopment of navigation is the BeiDou/INS integrated navigation, which has the bestperformance. This paper addresses the problem of BeiDou and SINS (strap-down InertialNavigation System) integrated navigation. The prime tasks are as follows:1. Research on acquisition technology of SINS-aided BeiDou receiver. Take advantageof the velocity and position information provided by SINS and satellite ephemeris, theDoppler frequently between the satellite and the receiver can be estimated, so that thefrequently range is limited, and time of acquisition decrease. As to be proved, the resultshow that the number of units needs to be searched is reduced, it is benefit for the receiverto acquisition the very signals.2. Design the mathematical model of integrated navigation. Take Kalman filter asinformation blend method, design the two ways of integrated navigation, anddeduce the state equation and measurement equation of the integrated navigation systems.3. Design Simulation system to test and verify the performance of BeiDou/SINSintegrated navigation. The design is based on mathematical model. The result shows that theintegrated navigation is more precisely compared with either of the two ways.