Research Based On SINS/GPS Tight Integrated Navigation System

The strapdown inertial navigation system has the advantages of strong autonomy,independent of external information,and not influenced by external factors.But the error can be accumulated with time,so it is not suitable for long time independence navigation.Global Navigation Satellite System can supply all-weather,global and real-time navigation.it can be accuracy for long time working,and the error will not accumulated with time.But the ability of anti-interference is poor,the signal easy to be blocked and not easy to lock when the carrier is moving with high speed.So it's stability is not strong.Combining the advantages of both,The performance of new system made up by SINS and GPS better than the performance of either.The paper focuses on the research of SINS/GPS tight integration system,in order to get better performance of navigation.Firstly,according to the theory of SINS/GPS tight integration system,set up systematic mathematics model,and the system is divided into three parts:the inertial navigation,the calculation of range and pseudo range,and the Kalman combination filtering.According to the original information needed by the tight combination navigation,the simulation module is established,and the simulator of vector trajectory is designed.Get the GPS information we needed by the lab's simulator of GNSS satellite.Secondly,design simulation system of tight integration system,research and test the algorithm and programme by the simulation.Then,According to the requirement of practical application,design the the hardware platform which is based on DSP and FPGA.analyze the performance of the system,In the actual environmentFinally,show the results that tested by hardware platform and integrated navigation system.The results show that the design of the integrated navigation system can work properly,has an important technical application prospect.