某型军用雷达转台噪声分析与处理

文中对某型军用雷达转台的噪声情况进行测试,对噪声信号进行频谱分析和短时傅里叶变换分析,确定了主要噪声源。针对转台的电机减速机组等主噪声源进行噪声控制,并基于目前可行的噪声控制技术提出了转台的噪声控制措施。由转台噪声处理前后的噪声测试结果对比可知,噪声控制措施使得转台总体噪声降低了8 dB左右,从而使噪声指标满足相关标准的要求。该噪声控制方案可行,效果良好,也为同类型噪声问题分析处理提供了有效参考。

Noise Analysis and Control for Pedestal Turntable of a Military Radar

The mechanism for the pedestal turntable noise of a military radar is analyzed and the actual noise is tested in this paper. At the same time the main noise sources are located accurately using spectral analysis and short-time Fourier transform methods. The noises from the main noise sources such as the motor speed reduction unit of turntable are controlled. The noise control measures for the turntable noise are proposed based on the existing feasible noise control technology. Test results from the turntable noise control shows that noise reduction measures have reduced the total noise of turntable by about 8 dB, so that the noise indicators meet the relevant requirements. The noise reduction method is feasible with good results, which provides the effective reference for the similar noise analysis and control.