充液管路低频线谱噪声有源控制试验研究  

Experimental research into active control of low-frequency line spectral disturbances in liquid-filled pipe

作　　者：孙运平[1,2] 孙红灵[1] 张维[1] 王晗[1,2] 杨军[1,2] SUN Yunping;SUN Hongling;ZHANG Wei;Wang Han;YANG Jun(Key Laboratory of Noise and Vibration Research,Institute of Acoustics,Chinese Academy of Sciences,Beijing 100190,China;University of Chinese Academy of Sciences,Beijing 100049,China)

机构地区：[1]中国科学院噪声与振动重点实验室(声学研究所),北京100190 [2]中国科学院大学,北京100049

出　　处：《中国舰船研究》2017年第4期122-127,131,共7页Chinese Journal of Ship Research

基　　金：国家自然科学基金资助项目(11474306)

摘　　要：[目的]充液管路系统的管口辐射噪声是舰船管路噪声控制的重点,具有较高能量的低频线谱噪声更是亟需得到进一步的抑制。[方法]针对充液管路低频线谱噪声问题,设计一套有源消声系统并进行试验验证。该系统由次级声源、控制器、功率放大器和传感器等构成。采用频率追踪算法对线谱频率进行估计,使用谐频自适应控制算法设计控制滤波器。建立泵水循环管路试验系统,开展固定线谱、移动线谱、多线谱噪声有源控制试验,验证有源消声系统的降噪性能。[结果]试验结果表明,该系统可自动跟踪线谱频率,实现移动频率的线谱噪声控制,能够同时控制多根线谱噪声,在管外取得8 dB以上的降噪效果且系统具有较好的鲁棒性。[结论]所得结果可为舰船管路系统低频线谱噪声控制提供可行的方案。Noise radiation through the liquid-filled pipe system is the focus of noise control in the pipe systems of ships,while low-frequency line spectral disturbances with high energy need to be further suppressed.An Active Noise Control(ANC)system adapted to liquid-filled pipes is designed to attenuate low-frequency line spectral disturbances.This system is made up of the secondary source,controller,power amplifier,sensor etc.The system uses a frequency tracking algorithm to estimate the frequencies of noise,and a complex LMS algorithm to design the controller.A pump water circulation pipe system is implemented to validate the control system's performance in noise reduction through experiments.Active control experiments on noise sources with fixed frequency,sweeping frequency and multi-frequency are carried out respectively.The results show that the control system can track frequencies automatically,and effectively reduce the noise radiating from the pipe in cases of fixed frequency,sweeping frequency and multi-frequency.The ANC system can achieve noise attenuation of over8dB at multi-frequencies in liquid-filled pipes,and has good robustness.This provides a possible solution for the noise control of low-frequency line spectral disturbances in the pipe systems of ships.

关 键 词：充液管路 低频线谱 频率追踪 有源噪声控制 

分 类 号：U667.7[交通运输工程—船舶及航道工程]