Underwater target localization and parameters(azimuth and range) estimation by the method of utilizing explosions as underwater sound sources are described in this paper.The narrow beam reverberation model of the targ...Underwater target localization and parameters(azimuth and range) estimation by the method of utilizing explosions as underwater sound sources are described in this paper.The narrow beam reverberation model of the target echo signal is researched to estimate the target azimuth in reverberation background.Estimation errors of target azimuth and range are studied and proved to approximately meet Gauss distribution.Then the variance formula of target range error is deduced.Simulation experiments are applied to research the target range error and its standard deviation,and a series of measures to improve the estimation accuracy of target range are proposed.It is confirmed by the data processing results of simulations and lake experiments that the proposed method can accurately locate underwater target at a long distance on the condition of a certain underwater explosion range error.展开更多
声震分析方法在工业爆炸事故、恐怖袭击等近地面爆炸事件的源参数预测上具有十分广阔的应用前景,本文通过改进声学模型和采用贝叶斯马尔科夫链蒙特卡罗(Markov Chain Monte Carlo,MCMC)反演方法改进了现有的声震分析模型,改进的声震分...声震分析方法在工业爆炸事故、恐怖袭击等近地面爆炸事件的源参数预测上具有十分广阔的应用前景,本文通过改进声学模型和采用贝叶斯马尔科夫链蒙特卡罗(Markov Chain Monte Carlo,MCMC)反演方法改进了现有的声震分析模型,改进的声震分析模型综合考虑了地冲击耦合和爆炸产物喷出地表的影响,声冲量修正关系相对Ford声冲量关系和实测数据符合得更好,适用于高埋深、浅埋和近地面空爆情况。采用改进的声震分析模型对30 kgTNT小当量化爆试验的源参数进行了分析,讨论了声震联合反演的精度。结果表明,改进声震分析模型在近地面小当量化爆参数反演中明显减小了单一模型反演的折衷关系,从而提高了源参数的估计精度。展开更多
基金supported by the National Natural Science Foundation of China(61431020,61571434)
文摘Underwater target localization and parameters(azimuth and range) estimation by the method of utilizing explosions as underwater sound sources are described in this paper.The narrow beam reverberation model of the target echo signal is researched to estimate the target azimuth in reverberation background.Estimation errors of target azimuth and range are studied and proved to approximately meet Gauss distribution.Then the variance formula of target range error is deduced.Simulation experiments are applied to research the target range error and its standard deviation,and a series of measures to improve the estimation accuracy of target range are proposed.It is confirmed by the data processing results of simulations and lake experiments that the proposed method can accurately locate underwater target at a long distance on the condition of a certain underwater explosion range error.
基金the National Natural Science Foundation of China(No.12072290).
文摘声震分析方法在工业爆炸事故、恐怖袭击等近地面爆炸事件的源参数预测上具有十分广阔的应用前景,本文通过改进声学模型和采用贝叶斯马尔科夫链蒙特卡罗(Markov Chain Monte Carlo,MCMC)反演方法改进了现有的声震分析模型,改进的声震分析模型综合考虑了地冲击耦合和爆炸产物喷出地表的影响,声冲量修正关系相对Ford声冲量关系和实测数据符合得更好,适用于高埋深、浅埋和近地面空爆情况。采用改进的声震分析模型对30 kgTNT小当量化爆试验的源参数进行了分析,讨论了声震联合反演的精度。结果表明,改进声震分析模型在近地面小当量化爆参数反演中明显减小了单一模型反演的折衷关系,从而提高了源参数的估计精度。
