Influence of Sonobuoy Array on the Efficiency of Searching Submarine
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Efficiency of searching submarine is an important reference for evaluating the characteristic of sonobuoy array.In order to research the influence of sonobuoy arrays on the efficiency of searching submarine,the thesis gives the mathematical models of submarine movement and sonobuoy array in aerial searching submarine,according to the need of aerial antisubmarine warfare.Associating with the parameters of searching submarine,such as the number of sonobouy,range between antisubmarine bases and original submarine position,velocity of antisubmarine aircraft and movement of submarine,Monte Carlo method is used to simulate and analyze the efficiencies of searching submarine by using different sonobuoy arrays.Simulation results show that sonobuoy arrays have great difference and monolayer circular sonobuoy array has better efficiency of searching submarine,and this offers a subsidiary reference for sonar operator to optimize sonobuoy array.Cite
Based on the principle of hyperbolic fixing(HYFIX),some mathematical models are set up for the HYFIX of passive omnidirectional sonobuoy. Through computer programming and simulating,the author analyzed the action range of the sonobuoy,the deployment space between sonobuoys and the effect of sonobuoy deployment array on locating accuracy from HYFIX of passive omnidirectional sonobuoy. It may provide a theoretical basis for choosing the appropriate space and array of sonobuoy deployment when the anti-submarine airplane carries out a submarine searching task.
Airplane
Basis (linear algebra)
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sonobuoy is a kind of effective,little limited with region and convenient equipment to detect submarine.A lot of factors should be considered when using sonobuoybalk to search submarine,the most important factor is detection probability.This paper researches the methods and essential factors on arranging Buoy-Array when using sonobuoy at beat and discounts the casting model of buoy-array when some suspicious signals were detected.The paper analyses the influence of Buoy-interval on detect probability,these results are significant for casting buoy-array at beat.
Buoy
Beat (acoustics)
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On the foundation of introducing respective application of dipping sonar and sonobuoy in answering the call to anti-submarine,a new searching tactic is advanced and proved in theory that the tactic has more advantages.
Foundation (evidence)
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According to the course of active sonobuoy searching submarine,the effects of submarine evasion on combat effectiveness of active sonobuoy is studied.The mathematical models of active sonobuoy detecting targets are established.According to the theory of smooth averaged sound field in shallow water,the searching scope of active sonobuoy is deduced when the depth of submarine is changed.Basing on the presented models,the searching scope and detection probability of active sonobuoy are estimated,and the effects of different evasion angles,depth and sea environment on searching submarine are amalyzed.Lastly simulation results show that under certain condition the combat effectiveness of active sonobuoy for submarine can be reduced by proper evasion strategy.
Evasion (ethics)
Scope (computer science)
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Passive sonobuoy detect with concealment and continuance,so submarine movement influence on sonobuoy search and rise the probability to be detected.Firstly,Based on analyse of former model's localization,according to the theory of its influence,build mathematics model of single sonobuoy increasing search area,and analyse its influence factor,then analyse and build model of its influence on sonobuoy block line,draw the conclusion that influence is related to sonobuoy detect distance,space and submarine course,and give some advice on the operation application.
Continuance
Line (geometry)
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The detection performance of passive sonobuoy is not only related to the equipment performance,but also connected with target and environment character.The models of submarine's motion and sea environment were first established,and according to the theory of smooth averaged sound field in shallow water,the searching scope of passive sonobuoy was deduced when submarine changed its evasion depth.The effects of different speeds,depth and sea environment on detection scope were discussed.Lastly simulations were made,and the results show that target and environment characters have an important effect on detection scope of passive sonobuoy,which is significant for aeronautical anti-submarine training.
Scope (computer science)
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The significance of the searching effectiveness model study of round sonobuoy array was summarized.Through analyzing the searching process of round sonobuoy array,the mathmatical model on searching effectiveness of round sonobuoy array was put forward.In the end,the application of this model was discussed.
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Sonobuoy campaigns agilely and can be deployed expeditiously.In addition,it can search a large range of area.As a result,it is of great importance to the navy's campaign.Sonobuoy can detect,orientate and track the target,so the orientation arithmetic of sonobuoy is worthy of investigation.Presently the common use arithmetic is LOFAR,CODAR and so on.The arithmetic of the orientation of the sonobuoy are studied and analyzed.Through the computer simulation,the theory and the performance of the arithmetic are studied in different background of noise.
LOFAR
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Several typical styles of helicopters' encircled sonobuoy arrays are introduced,and the sonobuoys' position models are established,which provides a scientific theoretical basis for sonobuoy placing. The distribution model of submarines' initial position was set up and the method for calculating the distribution radius of the submarines was described. Then,the submarines' maximum velocity was estimated mathematically based on some specific hypothesises. The submarines' maximum velocity was defined as twice of its economical speed,which rationality was demonstrated through the probability theory. In this way,the submarines' velocity obeys Rayleigh Distribution. Finally,simulation was made about the effect of the submarines' initial position distribution and their economical speed on the antisubmarine searching probability of the encircled sonobuoy arrays,and some results were obtained.
Position (finance)
Rayleigh distribution
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