摘要
针对实验室一台直流电动机-同步发电机机组运行噪声的频谱特点,提出空间双通道有源噪声控制系统降低电机运行噪声。采用四种双通道控制算法(Ⅰ)FxLMS算法,(Ⅱ)FuRLMS算法,(Ⅲ)HFxLMS算法以及(Ⅳ)FBFxLMS算法进行电机运行噪声有源控制实验,对于电机运行转速分别为1300 r/min、1400 r/min和1500 r/min时,噪声控制区域内水平平面和垂直平面上平均声压级降低量均大于10 dB,水平平面上最大声压级降低量分别为17.92 dB、13.28 dB和17.88 dB,垂直平面上最大声压级降低量分别为16.73 dB、16.36 dB和16.99 dB,降噪效果表明本文提出的空间双通道有源控制系统能有效地降低电机运行噪声。
A dual-channel space active noise control （ANC） system was invesitaged to control opeL,~ting noise by a combined motors with a DC motor and an inducation motor. The experiments were conducted with four dual-channel ANC algorithms including Filter-x Least Mean Square （FxLMS）, Filter-u Recursive Least Mean Square（ FuRLMS）, Hybrid FxLMS（HFxLMS） and Feedback FxLMS（FBFxLMS） to control the motor operating noise, and the results show that the average sound pressure level（SPL） reductions on the horizon- tal and vertical planes of the noise quiet zone are larger than 10dB when the DC motor operates at the speeds of 1300r/min, 1400r/min and 1500r/min. The maximum SPL reductions on the horizontal plane are 17.92dB, 13.28dB and 17.88dB, while 16. 73dB, 16.36dB and 16. 99dB on the vertical plane, respec- tively. The remarkable SPL reductions in the noise quiet zone show that the proposed dual-channel space ANC system earl be effective to control the motor operating noise.
出处
《微电机》
北大核心
2011年第12期1-5,共5页
Micromotors
关键词
直流电动机
有源噪声控制
双通道算法
DC motors
active noise control
dual-channnel ANC algorithms
