基于最小二乘均衡反馈法的舱室声场复现  

Sound field reproduction system for cabin mock-up by multichannel least square equalization method with feedback control

作　　者：于泳 刘联鋆[1] 郑旭[1] 王栋 李新明[2] YU Yong;LIU Lianyun;ZHENG Xu;WANG Dong;LI Xinming(College of Energy Engineering,Zhejiang University,Hangzhou 310027,China;Beijing Institute of Spacecraft Environment Engineering,Beijing 100094,China)

机构地区：[1]浙江大学能源工程学院,杭州310027 [2]北京卫星环境工程研究所,北京100094

出　　处：《航天器环境工程》2021年第2期160-165,共6页Spacecraft Environment Engineering

基　　金：国家自然科学青年基金项目(编号:51905474);北京卫星环境工程研究所创新基金项目(编号:CASTBISEE2019-013)。

摘　　要：在航天器飞行状态下进行声学环境研究的成本较高,因此基于声场复现的方法在地面搭建模拟舱室并复现声学环境,对于后续降噪及声品质研究具有重要意义。文章基于最小二乘均衡反馈法编写了声场复现系统程序,在舱室内进行声场复现实验,以8个扬声器实现了对10个目标点的随机噪声的复现,最大误差总值不超过1 dB,1/3倍频程各频带幅值的误差不超过3 dB。The experimental evaluation of the acoustic environment during the flight of a spacecraft is very expensive.Thus,it is of great significance for the subsequent noise reduction and sound quality research to build a cabin mock-up on the ground to reproduce the acoustic environment based on the method of the sound field reproduction.In this paper,a sound field reproduction system using a multichannel least-square equalization method with a feedback control is proposed to reproduce the acoustic environment in a cabin mock-up.The targeted sound spectra at ten points are reproduced by eight loudspeakers.The errors of the total sound pressure level and the 1/3 octave spectrum level are within 1 dB and 3 dB,respectively.

关 键 词：声场复现 模拟舱室 最小二乘法 反馈控制 

分 类 号：V416.5[航空宇航科学与技术—航空宇航推进理论与工程]