Dissertation > Astronomy,Earth Sciences > Surveying and Mapping > Geodesy > Satellite geodesy and space geodesy > Global Positioning System (GPS)

The Study of High Dynamic GPS/INS Integrated Navigation System

Author WangPengHui
Tutor FanShengLin
School Nanjing University of Aeronautics and Astronautics
Course Precision instruments and machinery
Keywords High dynamic Integrated Navigation Phase-locked loop Software Receiver IF Kalman filter
CLC P228.4
Type Master's thesis
Year 2010
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With the current high-speed, high dynamic aircraft emerging research in high dynamic aircraft navigation. GPS and INS are currently two main types of navigation systems. Dynamic stress of the carrier in the case of high dynamic GPS receiver tracking loop can easily lead to loss of lock of the receiver tracking loop loss of navigation capability. INS has anti-electronic jamming, large maneuvers, concealment and good. In high dynamic environment, the INS speed auxiliary GPS receiver loop can effectively improve the performance of the GPS receiver to meet the requirements of navigation in high dynamic environment. This paper focuses on high dynamic environment of GPS / INS integrated navigation technology research. Papers from the principle of the GPS receiver, detailing the GPS receiver carrier tracking loop and code tracking loop design, analysis and simulation of GPS receiver tracking loop measurement error and tracking threshold, thermal noise and carrier dynamic stress tracking the impact of the ring. GPS receiver in high dynamic environment is easy to lose lock feature, the GPS receiver tracking loop the INS speed auxiliary performance simulation analysis, provides a theoretical basis for the combination of navigation in the high dynamic environment. The INS speed auxiliary GPS receiver loop relates to the internal layout of the GPS receiver, the need to control its internal tracking loop parameters, the GPS chip is more difficult to achieve. A a receiver software instead of hardware receiver program, given in a given position using satellite ephemeris and INS velocity to calculate the Doppler frequency shift method, Research the INS speed assisted GPS / INS position speed combination Pseudorange the rate of the combination of GPS / INS ultra-tight combination. High dynamic environment, the physical simulation is very difficult and costly to build a complete dynamic simulation system is important. INS speed auxiliary GPS receiver loop based on the theory of a high dynamic GPS / INS integrated navigation system block diagram of the simulation to construct the flight trajectory generator, INS simulator, high dynamic GPS IF data emulator, real-time software GPS receiver, integrated navigation filter. The tools integrated into a high dynamic GPS / INS combination of navigation simulation system. Finally, the high dynamic GPS / INS integrated navigation performance for the simulation analysis. Simulation results show that the high dynamic environment INS-assisted GPS receiver tracking loop carrier largely unaffected by the dynamic stress. The receiver tracking loop of the phase error is kept in a small range, the GPS receiver can be a normal navigation solution, better integrated navigation. Also have a good performance in the presence of the GPS signal interruption case, when the signal is restored, the receiver tracking loop can quickly resume tracking.

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