Research On The Optimization Method Of Positioning Configurations In Underwater Acoustic Positioning

With the implementation of the strategy of marine power,it puts forward higher requirements in high-precision underwater positioning technology.Underwater acoustic positioning accuracy is affected by a variety of error sources,and the positioning configuration is one of the key error sources that affect the positioning accuracy.In underwater acoustic positioning,the layout of the buoy configurations,the flight path planning of the ship,the layout of the acoustic array of the transducer,etc.,have a direct impact on the accuracy of the underwater transponder,and when the geometric configuration is not good,it will cause ill-conditioned problems in the process of solving the solutions.So,it is necessary for the research on the positioning geometry configurations in the underwater acoustic positioning.In a word,this article carried out a few aspects of the study:1.In this paper,the underwater acoustic positioning system is systematically introduced and analyzed the existence of error sources that affected the positioning accuracy.2.The relationship between GDOP and positioning geometric configuration is introduced,and the optimization problem of geometric configuration is transformed into the minimum value of GDOP.The conic model of optimal positioning structure is constructed,and the constraint condition of optimal geometric configuration is deduced.The radius of the cone model,the water depth of the transponder,the number of buoys and the function of the positioning accuracy are verified,and the correctness of the cone model and the constraint condition is verified.3.The GDOP mathematical expectation formula is deduced,and the relationship between the expectation of GDOP and the height of the sound line is established,and the constraint condition of the maximum height of the sound line is found.4.In order to analyze the ill-conditioned problems in the underwater positioning solution,the main algorithms for solving the ill-conditioned problem are summarized.Through the experimental simulation,the advantages and disadvantages of various algorithms in solving the problem of underwater positioning are analyzed,and a solution method to solve the problem of ill-conditioned problems is improved and the accuracy of the solution is improved.