基于支持向量回归外推的统计最优近场声全息研究

通过数值仿真方法,研究统计最优近场声全息中全息面孔径大小对重建精度影响。结果表明当全息面孔径大于重建面孔径2个采样间隔便能获得较高的重建精度,再继续增大全息面孔径也可以提高重建精度,但是趋势变缓。在此基础上,进一步提出了一种利用支持向量回归对全息面孔径进行外推的方法,在不增加测量孔径的前提下,可以通过数据外推增大全息面孔径,提高重建精度。对方形简支钢板辐射声场的仿真结果,验证了方法的有效性。

Study of statistically optimized near-field acoustical holography based on hologram data extrapolation with support vector regression

The influence of hologram aperture on reconstruction precision is studied in detail by numerical simulation.In statistically optimized near-field acoustical holography,when the hologram aperture is 2 sample intervals bigger than reconstruction plane aperture,it achieves a satisfied accuracy.If the hologram aperture increases after that,the reconstruction accuracy grows slowly.Base on the result,a data extrapolation method based on support vector regression is presented.By using the extrapolated hologram dat...