| 小波变换和FFT用于PWM阀控制信号降噪的比较 |
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| 引用本文： | 周建萍,岳继光. 小波变换和FFT用于PWM阀控制信号降噪的比较[J]. 微型电脑应用, 2006, 22(1): 44-46 |
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| 作者姓名： | 周建萍 岳继光 |
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| 作者单位： | 1. 上海电力学院电力与自动化工程学院
2. 上海同济大学电子信息工程学院 |
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| 摘 要： | 桑车2000(桑塔纳2000型轿车)自动变速器有两个结构一样的PWM(Pulse WidthM0dulation)调节奏电磁阀。其理想的控制信号是标准的矩形波,但实际中的信号都受到不同程度的干扰。本文利用小波变换和快速傅立叶变换FFT(FastFourier Transform)两种不同的方法对该控制信号降噪,并通过MATLAB仿真。对比两种方法的仿真结果,可以得山小波变换用于信号降噪优于FFT用于信号降噪。
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| 关 键 词： | PWM阀 小波变换 FFT 信号降噪 |
| 文章编号： | 1007-757X（2006）01-0044-03 |
| 收稿时间： | 2005-09-08 |
| 修稿时间： | 2005-09-08 |
Comparison between Wavelet Transformation and FFT in the Denoising of PWM Valve Control Signal |
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| Zhou Jianping,Yue Jiguang. Comparison between Wavelet Transformation and FFT in the Denoising of PWM Valve Control Signal[J]. Microcomputer Applications, 2006, 22(1): 44-46 |
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| Authors: | Zhou Jianping Yue Jiguang |
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| Abstract: | Santana 2000 automatic transmission has two PWM electric valves with the same structure. Their ideal control signal is standard rectangular wave. However, their actual signal is disturbed more or less. The signal is denoised with two different methods (wavelet transformation and FFT) and simulated with MATLAB in the paper. Comparing the simulation results of the two methods, we draw the conclusion that wavelet transformation is better than FFT in signal denoising. |
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| Keywords: | PWM valve wavelet transformation FFT signal denoising |
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