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pdf
it is a pdf file regarding diversity
- 2009-11-18 15:02:34下载
- 积分：1
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chengxu
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)
- 2017-01-17 19:18:02下载
- 积分：1
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Programme
几种粒子群算法求解VRP问题，与GA对比(Several particle swarm algorithm VRP problems, compared with GA)
- 2011-11-29 21:33:52下载
- 积分：1
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sins4357345637456375
惯性导航解算程序，四阶龙格库塔发更新四元数，求姿态、速度和位置(Solver inertial navigation procedures, fourth-order Runge-Kutta issued to update the quaternion, seeking attitude, velocity and position)
- 2013-11-20 16:18:40下载
- 积分：1
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package_emd
经验模态分解代码，依据数据自身的时间尺度特征来进行信号分解，无须预先设定任何基函数。(Empirical mode decomposition code, based on the data of their characteristic time scale for signal decomposition, no need of any of a set of basis function.)
- 2012-11-27 23:21:01下载
- 积分：1
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chap4
说明： 自适应控制使用李雅普诺夫推导自适应律的学习程序(Adaptive control uses Lyapunov to derive adaptive law)
- 2019-05-24 21:03:39下载
- 积分：1
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adRLS
this is very good for master students and use in communication system course
- 2014-08-19 14:37:42下载
- 积分：1
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work
MATLAB几个画的图像，比较好玩，可以动态的显示(MATLAB image, several paintings more fun, dynamic display)
- 2015-04-20 17:40:01下载
- 积分：1
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Allan-ftting
进行了Allan方差分析，并用最小二乘分段进行了噪声误差系数拟合，已经取得预期效果(
Source link has yet to be found. Please, try to download it local website.
)
- 2020-10-04 22:37:44下载
- 积分：1
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magnet-servo-system
基于梯度算法的永磁伺服系统惯量辨识性能研究(Recognition properties of inertia permanent magnet servo system based on the gradient algorithm)
- 2012-07-21 16:36:07下载
- 积分：1
