自适应滤波抑制电机脉冲干扰效果分析  

Effectiveness Analysis of Adaptive Filter Suppression to DC Motor Interference

作　　者：顾斌[1] 于宝明[1] 汤滟[1] 刘磊[1] 

机构地区：[1]南京信息职业技术学院电子信息学院,南京210046

出　　处：《电测与仪表》2011年第12期37-42,共6页Electrical Measurement & Instrumentation

基　　金：南京信息职业技术学院2010年科研基金资助项目(YKJ10-001)

摘　　要：针对电机瞬态脉冲对无线通信设备的强干扰问题,以直流永磁电机干扰环境为例建立了自适应滤波器的抗干扰模型。首先分析直流永磁电机电磁干扰的传导机理,由此得到干扰脉冲的信号形式,然后利用干扰的先验信息,使用自适应滤波器对此干扰予以抑制,从而提取淹没于强干扰中的有用信号。分别使用基于LMS算法的横向结构和基于GAL算法的格形结构对相应波形和频谱进行仿真,结果表明:只要适当地设置有关参数,自适应滤波对电机脉冲干扰能起到有效的抑制作用;就收敛速度而言,后者优于前者。Addressing the issue that the instantaneous pulse causes a fatal interference to the wireless communication equipments,modeling of adaptive filter-based anti-interference is performed in an interfering environment of D.C permanent magnet motor as a paradigm.Firstly,the mechanism of how the D.C permanent magnet motor conducts electromagnetic interference is analyzed,from which a form of interference pulse is obtained.Further,using a priori information of this interference,adaptive filters are employed to suppress this interference to sort out the useful signal submerged in an overwhelming interference,using LMS-based transversal structure and GAL-based lattice structure respectively.The simulative results of waveform and spectrum indicate that the adaptive filter can suppress the pulse interference effectively if its coefficients are properly set.The latter outperforms the former in the aspect of converging speed.

关 键 词：电机 干扰 自适应滤波 最小均方算法 梯度自适应格型 

分 类 号：TM33[电气工程—电机]