Abstract
According to the characteristics of underwater navigation sensors,the method for determining the initial position based on dead reckoning( DR) trajectory translation strategy in the initial period of position was proposed to improve the accuracy of the initial position of DR system. This method combined the features of DR system and hydroacoustic navigation system,and got the optimal trajectory under the constraints of certain movement trends by translating DR trajectory to calculate the initial position. One real sea trial data was used to analyze this method. The results show that the position error of this method is 60. 2% and 77. 2%of the error of the average method and the least squares fitting method. The application of this method can reduce the position error of DR system and improve the stability of DR / hydroacoustic integrated navigation system.
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