chap3_2s

说明：  matlab 代码利用遗传算法工具箱，实现特定功能(The use of genetic algorithm toolbox matlab code to achieve a particular function)

viterbi simulation K = 7 in bpsk modulation

This is the MATLAB platform on setting up the simulink model. Hope everyone to correct mistakes

说明：  利用MATLAB绘制均匀线列阵和均匀圆阵的方向图(Uniform linear array mapping using MATLAB and the uniform circular array pattern)

face detetion in matlab

随机减量技术（Random Decrement Technique-RDT），其主要是利用样本平均的方法，去掉响应中的随机成分，而获得初始激励下的自由响应，(Random decrement technique (Random Decrement Technique-RDT), whose main method is to use the sample mean, remove the random component of the response, and the response to the initial excitation freedom of)

设计一个阻带下限0.45*pi 阻带上限0.8*pi 通带下限0.55*pi 阻带上限0.7*pi 通带衰减0.15dB，阻带衰减40dB，分别用汉宁窗汉明窗凯瑟窗布莱克曼窗设计滤波器，对比分析各方法优劣(Design a stop-band limit 0.45* pi stopband limit 0.8* pi Passband lower limit 0.55* pi stopband limit 0.7* pi Passband attenuation 0.15dB, stop-band attenuation of 40dB, respectively Hanning Hamming window Kaiser window Blackman window filter design, comparative analysis of the pros and cons of each method)

模糊熵，　为解决从信号中提取故障特征难的问题, 介绍了一种新的信号故障特征提取方法—— 多尺度熵( multi-scale entro py, 简称MSE) , 并将样本熵和多尺度熵分别应用于转子故障信号复杂性的度量, 以提取故障特征。试验数据 分析表明, 与样本熵相比, 多尺度熵更能有效地实现转子故障类型的诊断。(A new rolling bearing fault diagnosis approach based onmultiscale permutation entropy (MPE), Laplacian score (LS), and support vector machines (SVMs) is proposed in this paper. Permutation entropy (PE) was recently proposed and defined to measure the randomicity and detect dynamical changes of time series.)

运用自相关法，周期图法和burg法分析加噪信号功率谱并比较(The use of auto-correlation method, periodogram analysis burg and noise signal power spectrum and compare)

本程序为故障选相程序，可以区分接地与不接地故障。没有做故障发生判断，最好在故障时启动。(This program is the fault phase selection procedures, can differentiate between grounding and ground fault. Not make a fault judgment.)