摘要
为了提高自由场材料声学参数测量方法的精度,提出了校正实验误差的方法,建立了误差校正物理模型,修正求解散射场的计算公式,利用优化算法确定各测距误差及误差修正下的材料参数。理论仿真和实验结果表明,经过误差修正后的参数反演结果精度明显提高,并可同时估计出各测距误差的范围。
In order to improve precision of the measurement of material parameters in free field, a method is presented to correct experimental error. A physical model is established to correct experimental errors and the solution of scattering field is modified. An optimization algorithm is applied to determine geometric errors and parameters of material. Computer simulation and experimental results show that the inversion precision of material parameters is significantly increased after the geometric error correction. Values of the errors can also be estimated.
出处
《声学技术》
CSCD
北大核心
2007年第2期223-227,共5页
Technical Acoustics
关键词
散射场测量
测距误差
参数反演
measurement of scattering field
geometric error
inversion for material parameter determination
