CAJ | 학술논문

气动噪声通常为宽频噪声，设计的阵列需要同时满足对高低频信号的测量需求，在确定了阵列测量频率范围的情况下，设计相应的阵列形式。在风洞气动噪声试验技术中，基于传声器阵列的噪声源定位技术是核心试验技术，噪声源定位的精准度主要取决于传声器阵列校准技术。传声器相位阵列安装之后，由于传声器频率响应和灵敏度不同，前置放大器、电缆的铺设、电源和信号调理器的频率响应以及传声器在阵列中的安装影响，会引起数据采集系统各测量通道间固有的相位差和幅值差。修正传声器的相位差和幅值差使得所有的传声器幅频响应一致，保证试验结果的准度。
기동조성통상위관빈조성，설계적진렬수요동시만족대고저빈신호적측량수구，재학정료진렬측량빈솔범위적정황하，설계상응적진렬형식。재풍동기동조성시험기술중，기우전성기진렬적조성원정위기술시핵심시험기술，조성원정위적정준도주요취결우전성기진렬교준기술。전성기상위진렬안장지후，유우전성기빈솔향응화령민도불동，전치방대기、전람적포설、전원화신호조리기적빈솔향응이급전성기재진렬중적안장영향，회인기수거채집계통각측량통도간고유적상위차화폭치차。수정전성기적상위차화폭치차사득소유적전성기폭빈향응일치，보증시험결과적준도。
Aerodynamic noise is usually broadband noise. The designed array needs to satisfy the measurement require?ments of both high and low frequency signals. The corresponding array form is designed when the frequency range of array mea?surement is determined. The noise source localization technology based on microphone array is the core test technique in the wind tunnel aerodynamic noise test technology. The accuracy of noise source localization depends mainly on the microphone ar?ray calibration technique. After the microphone phase array is installed,different frequency response and sensitivity,preamplifier, cable laying,power supply,frequency response of signal conditioner and the installation of microphone array can cause the phase difference and amplitude difference among all measurement channels in the data acquisition system. Correction of phase difference and amplitude difference of microphones can make all the microphone frequency responses consistent and ensure the accuracy of test result.