为了利用多枚被动全向声呐浮标对目标进行定位,文章提出了一种基于多浮标观测的目标线谱多普勒变化规律和目标通过特性的多浮标联合定位算法。根据目标、多浮标之间的几何关系,建立求解目标定位点的模型。研究表明,利用一枚浮标的CPA(Cl...为了利用多枚被动全向声呐浮标对目标进行定位,文章提出了一种基于多浮标观测的目标线谱多普勒变化规律和目标通过特性的多浮标联合定位算法。根据目标、多浮标之间的几何关系,建立求解目标定位点的模型。研究表明,利用一枚浮标的CPA(Closest Point of Approach)距离圆和另外两枚浮标观测的多普勒变化规律,可以同时解算出目标的定位点、航速、航向,最后通过实验数据对模型进行了验证。展开更多
Measurements of bubble size distribution require the understanding of the acoustic characteristics of the medium.The bubbles show highly nonlinear properties under finite amplitude acoustic excitation,so the acoustic ...Measurements of bubble size distribution require the understanding of the acoustic characteristics of the medium.The bubbles show highly nonlinear properties under finite amplitude acoustic excitation,so the acoustic fields from bubble population are easily observed at the second harmonics as well as at the fundamental frequency,which shows that the nonlinear coefficient increases obviously.The inversion method of bubble size distribution based on nonlinear acoustic effects can peel off the influence of complex environment and obtain the size distribution coefficient information of bubbles more accurately.The previous nonlinear inversion methods of bubble size distribution are mostly based on the nonlinear scattering cross-section characteristics of bubbles.However,the stability of inversion is not high enough.In this paper,we introduce a new acoustic inversion method for bubble size distribution,which is based on the nonlinear coefficients of bubble medium.Compared with other inversion methods based on linear or nonlinear scattering cross section,the inversion method based on nonlinear coefficients of bubble medium proposed in this paper shows good robustness in both simulation and experiment.展开更多
文摘为了利用多枚被动全向声呐浮标对目标进行定位,文章提出了一种基于多浮标观测的目标线谱多普勒变化规律和目标通过特性的多浮标联合定位算法。根据目标、多浮标之间的几何关系,建立求解目标定位点的模型。研究表明,利用一枚浮标的CPA(Closest Point of Approach)距离圆和另外两枚浮标观测的多普勒变化规律,可以同时解算出目标的定位点、航速、航向,最后通过实验数据对模型进行了验证。
基金the National Natural Science Foundation of China(Grant Nos.11674074 and 61701133).
文摘Measurements of bubble size distribution require the understanding of the acoustic characteristics of the medium.The bubbles show highly nonlinear properties under finite amplitude acoustic excitation,so the acoustic fields from bubble population are easily observed at the second harmonics as well as at the fundamental frequency,which shows that the nonlinear coefficient increases obviously.The inversion method of bubble size distribution based on nonlinear acoustic effects can peel off the influence of complex environment and obtain the size distribution coefficient information of bubbles more accurately.The previous nonlinear inversion methods of bubble size distribution are mostly based on the nonlinear scattering cross-section characteristics of bubbles.However,the stability of inversion is not high enough.In this paper,we introduce a new acoustic inversion method for bubble size distribution,which is based on the nonlinear coefficients of bubble medium.Compared with other inversion methods based on linear or nonlinear scattering cross section,the inversion method based on nonlinear coefficients of bubble medium proposed in this paper shows good robustness in both simulation and experiment.
