基于体绘制的UUV水声探测波束仿真方法研究

项目名称： 基于体绘制的UUV水声探测波束仿真方法研究

项目编号： No.61503124

项目类型： 青年科学基金项目

立项/批准年度： 2016

项目学科： 自动化技术、计算机技术

项目作者： 曾艳阳

作者单位： 河南理工大学

项目金额： 22万元

中文摘要： 本项目研究基于体绘制的UUV水声探测波束实时仿真问题。仅依靠水下声场散乱体数据间的离散采样信息，在确定邻域内水声波束的实时渲染问题上，其求解条件是不充分的，需结合声辐射传输进行，而声辐射传输受洋流、海水温盐密特性等因素影响具有漂移不确定性，因此辐射传输对本方案具有关键性的制约作用。本项目拟主要采用非线性不确定系统最优估计理论，针对辐射传输不确定条件下的水声探测波束仿真算法问题进行研究，包括：(1)辐射传输已知时水声波束的仿真模型与基本算法；(2)辐射传输受洋流干扰、海水温盐密特性影响下，基于声辐射传输估计的实时仿真算法；(3)不同辐射传输对水声波束实时仿真的影响规律研究。通过理论分析、数字仿真及水声波束视景仿真系统的应用测试，解决海洋环境探测过程中，受声辐射传输不确定性影响而致的仿真模型精度不高的问题，建立一种稳定易行的水声动态波束模拟方案，适应海洋活动中环境探测动态声场实时绘制应用需求。

中文关键词： 体绘制；水声波束；建模与仿真；辐射传输；海水特性

英文摘要： We will research the question that some real-time simulation methods based on sight discrete sampling of the underwater acoustic field in the project. we can't render acoustic beams in the neighborhood of underwater acoustic field only using the sampling distance information between the perspective of adjacent acoustics, because the condition is not sufficient without acoustic radiation transmission theory. But the optical radiation transfer is disturbed by some factors including ocean currents and seawater TSD features (temperature,salinity and density ) with drift uncertainty. The transmission of optical radiation play a key role in the research project. Applicant will mainly adopt the optimal estimation theory of nonlinear uncertain system in this project, and study the following questions under uncertainty of the acoustic radiation transmission aiming at simulation algorithms of discrete sampling acoustic field. (1) the underwater acoustic field simulation models and basic algorithms in the case of known radiation transmission; (2) the real-time simulation algorithms based on the radiative transfer estimation in the influence of the radiation transmission by ocean currents, seawater TSD disturbance features; (3) the accuracy of real-time simulation models because of different radiative transfers. Through develop theoretical analysis, digital simulation and virtual acoustic field visual simulation system, We will solve the low simulation model accuracy affected by the uncertainty of acoustic radiation transfer in the process of the marine environment modeling. a stable and easy to realize underwater dynamic acoustic field simulation scheme will be established for render a large-scale of acoustic field in the marine activities.

英文关键词： volume rendering;acoustic beam;modeling & simulation;radiative transfer;seawater features