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This paper mainly presents an emergency navigation method based on the model of autonomous underwater vehicle (AUV). Dead-Reckoning navigation system depends highly on the reliability of Doppler Velocity Log (DVL) and the failure of DVL will result in divergence of the navigation which would lead the AUV to an emergent situation. So an alternative method is needed to provide velocity messages of the...
The problem of autonomous driving and aided navigating has received increasing attention in recent years. INS/GPS integrated navigation for intelligent vehicles is developed. This system is made of GPS and INS, it is the core algorithm to make information fusion using Kalman filter. With INS aided, the navigation system has the fault-tolerant ability. Simulaton results show that the system can satisfy...
The satellite orbit parameters in the ephemeris and location of land receiver were studied. Universal mathematic models of Doppler frequency-shift were deduced using geometric vector. The Doppler frequency between satellites and land receivers and relations of Doppler frequency-shift and elevation angle are analyzed in low, middle and high orbits, and algorithm models were constructed. The simulation...
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