【摘要】 基于直流电机运行噪声的特点,对于管道有源噪声控制系统的次级声源和误差传感器位置选择,提出了两种优化策略并给出了物理系统的优化设计结果,通过实验验证了两种优化策略的可行性。在优化后的管道实验平台中使用不同有源噪声控制算法进行管道噪声控制实验,噪声源分别为160~550 Hz的单频率正弦周期信号和基波100 Hz,1—5次谐波的多频率正弦周期信号时,两种优化策略最大的降噪量分别达36.2 dB和26.4 dB,降噪效果显著,表明有源控制系统可以有效降低电机运行噪声。更多还原

【Abstract】 Two optimized methods were developed to determine the appropriate positions of the secondary speaker and the error sensor in a duct active noise control(ANC) system based on the characteristics of the direct current motor operating noise.Test results on an optimized duct platform with various adaptive algorithms with single tone noises show that the maximum sound pressure reduction is about 36.2 dB with a single frequency 160-550 Hz sinusoidal wave and 26.4 dB for the first to fifth order harmonics sinusoidal waves with a 100 Hz fundamental frequency primary noises.The significant noise reduction by this duct noise control system indicates how effective the system is for reducing motor operating noise.更多还原