摘要
针对直流电动机无传感器测速中的电枢电流高频分量提取问题,利用经验模态分解方法获得的固有模态函数的局部频率按从大到小顺序排列的特点,构造了具有良好自适应能力的时空滤波器,并将其应用于电枢电流的消噪和高频分量提取。和采用小波阈值消噪、滤波、重构的方法相比,时空滤波器方法不仅能在直流电动机起动过程中很好地提取高频分量,而且稳态时提取的高频分量也更平滑;实验结果表明该方法的有效性。
Focusing on the high frequency component extraction for the armature current of DC motor without senor t,the character of the local frequencies arranged in descending order was obtained for the intrinsic mode function according to the empirical mode decomposition. The time-space fiher banks were designed with good adaptability and applied for the high frequency component extraction and noise suppression of the armature current. Compared with the wavelet method by experiments and simulation, the design brings better filtering effect and smoother high component.
出处
《微特电机》
北大核心
2013年第5期28-31,共4页
Small & Special Electrical Machines
基金
国家自然科学基金项目(60974005)
郑州市普通科技攻关项目(121PPTGG364-3)
关键词
经验模态分解
时空滤波器
起动特性
直流电动机
高频分量
empirical mode decomposition (EMD)
time- space filter banks ( TFB )
starting character
DC motor
high frequency component