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lowfrequency

于 2011-12-06 发布文件大小:2KB

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该程序可以求取电力系统低频振荡特征根，输入数据为三机9节点系统(The program can strike a power system low frequency oscillation characteristic roots, the input data for the three-machine 9-bus system)

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yanfun2
这是另个对磨床加工工件工序问题建模求解的MATLAB程序，方法合理可靠(This is another one of the workpiece grinding process modeling and solving the problem of the MATLAB program, the method is reasonable and reliable)

2010-10-23 23:39:13下载

积分：1
xiaobosuanfa
采样频率 fs=10000 轴承外环故障信号 fid=fopen( bearingout.dat , r ) 故障 N=1024 xdata=fread(fid,N, int16 ) fclose(fid) xdata=(xdata-mean(xdata))/std(xdata,1) 时域波形 figure(1) plot(1:N,xdata) xlabel( 时间 t/n ) ylabel( 电压 V/v ) db10小波进行4层分解一维小波分解 [c,l] = wavedec(xdata,4, db10 ) 重构第1～4层细节信号 d4 = wrcoef( d ,c,l, db10 ,4) d3 = wrcoef( d ,c,l, db10 ,3) d2 = wrcoef( d ,c,l, db10 ,2) d1 = wrcoef( d ,c,l, db10 ,1) ( Sampling frequency fs = 10000 bearing outer ring fault signal fid = fopen (' bearingout.dat' , ' r' ) failure N = 1024 xdata = fread (fid, N, ' int16' ) fclose (fid ) xdata = (xdata-mean (xdata))/std (xdata, 1) time-domain waveform figure (1) plot (1: N, xdata) xlabel (' Time t/n' ) ylabel ( ' voltage V/v' ) db10 wavelet decomposition 4 layer one-dimensional wavelet decomposition [c, l] = wavedec (xdata, 4, ' db10' ) 1 ~ 4 reconstructed detail signal d4 = wrcoef (' d' , c, l, ' db10' , 4) d3 = wrcoef (' d' , c, l, ' db10' , 3) d2 = wrcoef (' d' , c, l, ' db10' , 2) d1 = wrcoef (' d' , c, l, ' db10' , 1) )

2011-05-21 16:48:36下载

积分：1
chazhi
sp3精密星历插值，采用滑动牛顿多项式，可以达到cm级精度，插值结果为速度和位置(Star calendar interpolation)

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2011-04-26 21:46:10下载

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cma_gaijin
此程序为改进后的cma算法，纠正了相位的偏移，对于研究cma算法的有帮助(This program improved cma algorithm to correct the phase offset for cma algorithm)

2020-10-17 19:37:27下载

积分：1
3456887text
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2014-11-27 09:36:08下载

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2010-06-19 06:30:33下载

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