dvbt2_exp_101227_v021001

说明：  MATLAB+程序设计与应用_刘卫国 全面系统介绍MATLAB程序设计的方法和相关领域应用(MATLAB+ program design and application of comprehensive and systematic description _ Liu Weiguo MATLAB programming and related areas of application of the method)

Cooperative Diversity in Wireless Networks. show big benefit from results when the relay is located between the sender and the destination

本程序是计算振动信号各种参数的实验程序。 主要功能是计算均值、标准差、方差、偏斜度、峭度、 峰峰值、方根幅值、平均幅值、峰值、 波形指标、峰值指标、脉冲指标、裕度指标。 ( This program is to calculate the vibration signals of various parameters experimental procedures. The main function is to calculate the mean, standard deviation, variance, skewness, kurtosis, peak-peak amplitude of the square root of the average amplitude of the peak, waveform indices, peak indicators, pulse index, margin targets.)

这是可以解决tsp问题的遗传算法的matlab，产生初始群体是没采用改良圈法代码，有测试数据，可供参考学习(this is a generic algorithm for tsp)

在matlab环境下编程实现了应用模糊控制理论整定PID控制器参数，并对已知模型进行阶跃响应仿真实验。(Matlab programming environment in the realization of the control theory of fuzzy PID controller tuning parameters, known model and step response simulation.)

有关求解微分方程的代码 常微分方程的matlab解法(using matlab to solve normal differential equations)

choudhury教授的关于阀门粘滞模型的Matlab/Simulink 模型，绝对真实，本人亲自运行成功。(A valve stiction model of professor Choudhury. )

小波变换进行变速箱故障诊断 首先将s1和s2信号时域谱（s1代表维修前的振动信号，s2代表维修后的振动信号），画出来进行对比，会发现s1信号的振动幅值会比较高；然后对s1和s2分别进行小波分解并画出各层的时域谱，只对比s1和s2分后的最高时域谱，s2更加的具有周期性，且幅值较小，s2周期性不够明显，且振动过于密集。分析完时域谱后开始分析频谱，首先对原信号s1和s2fft转换，得到频谱图，如图，然后再对小波分析后高频部分进行fft转换，做出频谱图。对比后我们发现，在f 2375HZ出（也就是齿轮的啮合频率），s1信号频谱幅值会有急剧的升高，然后，其谐波的幅值也会增大。所以可以推断出该维修前的增速箱的齿轮可能出现问题。(Gearbox fault diagnosis based on wavelet transform s1 and s2 first time domain signal spectrum (s1 behalf of the vibration signal before maintenance, vibration signal s2 representative of repaired), drawn comparison, you will find a signal s1 vibration amplitude will be higher then s1 and s2 respectively wavelet decomposition and draw the layers of time-domain spectrum to only a maximum time domain spectroscopy s1 and s2 points after, s2 is more cyclical and smaller magnitude, s2 cyclical enough obviously, and the vibration is too dense. End domain spectral analysis after the beginning of the spectrum analysis, the first of the original signal s1 and s2fft conversion to give the spectrum, as shown, and then after the high frequency part of wavelet analysis fft transformation to make spectrum. We found that after the comparison, at f 2375HZ out (i.e. the gear mesh frequency), there will be a sharp increase in the amplitude spectrum of the signal s1, and then, the amplitude of the ha)

说明：  MATLAB GUI设计实例程序（电工）.

一、实验要求 信号为两个正弦信号加高斯白噪声，各正弦信号的信噪比均为10dB，长度为N，信号频率分别为和，初始相位，取，取不同数值：0.3，0.25。为采样频率。分别用Levinson递推法和Burg法进行功率谱估计，并分析改变数据长度、模型阶数对谱估计结果的影响。(Power spectrum estimation)