單矢量水聽器被動定位方法研究
[Abstract]:Underwater acoustic localization technology has always been a hot topic in underwater acoustic engineering. Because a single acoustic hydrophone has no direction-finding capability, underwater acoustic localization is usually achieved through an array of multiple primitives. A single vector hydrophone can synchronously measure the sound pressure and velocity information in the sound field and can estimate the target azimuth by a single measurement. When the target moves according to a certain rule, the relative position of the target and the vector hydrophone may be solved by multiple measurements. In this paper, the azimuth estimation of single vector hydrophone, the passive location technology of single vector hydrophone and its application are studied. The main work is as follows: firstly, this paper studies the azimuth estimation method of single vector hydrophone. It includes two azimuth estimation methods, weighted histogram and histogram based on single vector hydrophone. The factors affecting the performance of azimuth estimation are analyzed, the performance of azimuth estimation is discussed, and the matters needing attention in practical use are pointed out. The method of azimuth estimation based on envelope spectrum presented in this paper can effectively solve the fuzzy problem of vector hydrophone envelope spectrum azimuth estimation and can effectively realize multi-objective azimuth estimation. The sea trial data of the vector hydrophone in the South China Sea are processed, and the contents of the study are verified. Then, the passive location method of single vector hydrophone is presented. One is the azimuth-only passive positioning method which only uses the relative position of the measuring point and the estimation of the vector hydrophone azimuth to determine the relative position of the measuring point and the vector hydrophone. The second is the passive localization method of a single vector hydrophone to the moving target with a uniform velocity, that is, assuming that the target moves at a certain speed straight line, the velocity is obtained by using the spectrum information or GPS information, and the target is located with the azimuth information. The performance of the two methods is simulated and verified by sea test data. Finally, the directional characteristics of radiated noise of surface ship are estimated by using the passive location method of single vector hydrophone. A method for estimating the directional characteristics of the strong linear spectrum and the envelope spectrum is presented, and some meaningful results are obtained by using this method to process the sea test data.
【學位授予單位】:哈爾濱工程大學
【學位級別】:碩士
【學位授予年份】:2014
【分類號】:TB565.1
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