摘要
为了提高混响室声场模拟能力,北京卫星环境工程研究所自研一套高声强声场模拟试验设备。文章介绍了该设备的行波管发声系统设计和消声降噪处理过程——行波终端设计以及声试验控制仪器的原理。经过调试试验验证,测量结果满足声压级165 d B行波声场的要求,行波管试验段性能良好,达到167.9 d B,消声道出口噪声能够满足环境模拟需求。
A high intensity acoustic test system designed by BISEE is presented in this paper, including the acoustic design, the anechoic approach and the noise elimination, and the development of a closed-loop acoustic control system. The test results show that with the overall sound power level of 165dB, the TWT performs well, and the noise at the end of the exhaust flow meets the environmental requirements.
出处
《航天器环境工程》
2016年第3期312-315,共4页
Spacecraft Environment Engineering
关键词
高声强声场
行波管
1/3倍频程
消声降噪
high intensity acoustic field
traveling wave tube
1/3 octave band
noise elimination
