摘要
随着数字信号处理技术和计算机控制技术的发展,数字滤波器在信号处理中得到广泛的应用。本文在MATLAB环境下,编程设计了巴特沃斯低通滤波器,滤除了给定信号的3次及以上的谐波。文中对4阶、6阶、8阶巴特沃斯低通滤波器的效果进行了对比分析,对滤波前后的信号进行了FFT分析,仿真结果表明,本文的设计满足要求。
With the development of digital signal processing and control technology, digital filter has been widely used in signal processing. In this paper, a Butterworth low-pass filter, which can filter out high-order harmonic of the given signal, is designed based on MATLAB. The filtering result of 4 order, 6 order and 8 order Butterworth low-pass filter is compared and analyzed with FFT analysis on the signal before and after being filtered. The design method is validated by simulation.
出处
《机电设备》
2015年第5期68-72,共5页
Mechanical and Electrical Equipment
