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Reciprocatingcompressorvibrationsignalspectrumanal
Reciprocating compressor vibration signal spectrum analysis and fault diagnosis往复式压缩机振动信号频谱分析与故障诊断.pdf
- 2009-11-26 21:37:12下载
- 积分：1
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example4_3
例3：分析占空比为ta的矩形脉冲频谱
T=1 时间窗大小
ta=0.5 占空比
N=256
t=linspace(-T,T,N)
ts=2*T/N
fs=1/ts
(x=zeros(1,N)
x(N/2-round(N/2*ta):N/2+round(N/2*ta))=ones(1,2*round(N/2*ta)+1)
y=fft(x,N)
figure
plot(t,x)
title([ 时域信号图 占空比为 ,num2str(ta)])
axis([-T T-0.2 1.2])
xlabel( t /s )
figure
subplot(211)
f=linspace(-fs/2,fs/2,N)
plot(f,abs(fftshift(y))/N)
title([ 矩形脉冲双边谱 脉冲时间t=[- ,num2str(ta*T), , ,num2str(ta*T), ] ])
xlabel( f /Hz )
)
- 2010-05-25 20:59:59下载
- 积分：1
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lcd
主要用于计算半致死浓度，包括曲线拟合等算法(Mainly used to calculate the LC50, including curve fitting algorithms, such as)
- 2011-09-28 10:05:09下载
- 积分：1
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Matlab-TreeSearch
breadthfirstsearch FOR SEARCH ROAD
- 2013-10-17 00:24:49下载
- 积分：1
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dynamicresponse
dynamic response with wilson teta
Program: MATLAB program for dynamic response to base excitation using Wilson-0 method
Response due to ground excitation using Wilson-Theta method
- 2015-02-11 19:24:09下载
- 积分：1
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FD
说明： 小型时域有限差分的程序，在matlab环境下运行。(Small FDTD program, run in matlab environment.)
- 2014-02-08 15:03:05下载
- 积分：1
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InteractiveSmoothing
Interactive smoothing for time-series
- 2009-10-03 20:49:07下载
- 积分：1
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0914
stochastic diff equ, 随即微分方程的,比较使用(stochastic diff equ,)
- 2009-05-01 18:05:21下载
- 积分：1
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BPArithmeticProgramWithMATLAB
使用MATLAB语言实现的BP算法源程序(using MATLAB BP algorithm source code)
- 2007-04-16 08:55:04下载
- 积分：1
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Matlab
Detect circles with various radii in grayscale image via Hough Transform
- 2015-01-13 22:16:29下载
- 积分：1
