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3下载:
vb版本的fft变换,能够正反变换。正变换:
把时域信号转换成频域信号,反变换:能够把频域信号转换成时域信号。fft可广泛应用于工程领域,例如:信号的频域分析。震动,噪声的分析等等。-vb version of the fft transform, to transform pros. Transformation : put time domain signal into frequency domain signal, anti-transformation : can frequenc
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单自由度振动系统--基于MATLAB建模仿真。根据单自由度振动系统数学模型,设计了单自由度振动系统的数学仿真实验,实验结果给出了振动方程的数值解,并用几何方式定量描述了振动过程和频幅特性.-single-freedom vibration systems -- based on MATLAB simulation modeling. Under the single-freedom vibration systems mathematical model, the design of sing
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该软件能够对振动信号进行采集并同时进行频谱分析,对波形进行存储,处理的过程中可以对不需要的频率进行去除。-The software is capable of vibration signal acquisition and the same time spectrum analysis, the waveform storage, the process can not remove the frequency.
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小波包分析提取振动信号中的特征频率,以及能量谱分析计算-wavelet packet analysis vibration signal from the characteristic frequency, and the energy spectrum analysis
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简易的震动波形绘制工具,用C#编写,可实现时域和频域的波形绘制,便于震动数据的分析-simple wave-mapping tools, prepared with C#, can be time-domain and frequency-domain waveform drawing, facilitate the analysis of vibration data
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基于嵌入式的正弦查表程序.在sintable.asm中定义的正弦表.系统频率设置49.152MHz,强振模式.-based embedded sine chat program. Sintable.asm defined in the sine table. System set the frequency 49.152 MHz, strong vibration mode.
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用 Matlab 编程模拟 李萨如曲线
两互相垂直的,频率成一定整数比例关系的简谐振动合成,合振动为有一定规则的稳定的闭合曲线,称李萨如曲线。运行程序,令a=pi/3,k=3可得李萨如曲线-simulation using Matlab programming Lissajous curve as two mutually perpendicular. frequency of a certain proportion of the whole synthesis of harmonic v
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hilbert时频识别(力学领域)Michael feldman编写(自由振动、强迫振动)-hilbert time-frequency identification (mechanical fields) Michael feldman prepared (free vibration, forced vibration)
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对轴承故障振动信号的matlab小波分析程序,能完成对故障特征频率的提取,Of bearing fault vibration signals matlab wavelet analysis procedures, can finish on the fault characteristic frequency extraction
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51单片机控制TLC5618产生锯齿波,作为本振的触发信号,并通过写ad9851的频率控制字来产生扫频信号-51 SCM TLC5618 produce sawtooth, as the vibration of the trigger signal, and by writing ad9851 frequency control word to generate sweep signal
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小波包分析提取振动信号中的分解,系数重构特征频率,以及能量谱分析计算-Wavelet packet analysis to extract the vibration signal decomposition coefficient reconstruction of the characteristic frequency, and calculate the energy spectrum analysis
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采用Matlab,计算薄板的固有频率和主阵型,并绘制出频率响应曲线,是振动分析、振动控制的基础-Using Matlab, calculate the natural frequency and the main sheet formation, and draw the frequency response curve, is the vibration analysis, vibration control based
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该Matlab算法,可以实现振动数据的文件的读取,进而可以进行时频分析,得到信号特征值-The Matlab algorithm can achieve vibration data of the document read, in turn, can be time-frequency analysis, Signal Characteristics
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小波包分析提取振动信号中的特征频率,以及能量谱分析计算-wavelet packet analysis vibration signal from the characteristic frequency, and the energy spectrum analysis -Extraction of wavelet packet analysis in the vibration signal characteristic frequency, as well as the calculati
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工量预测.xls
截面扭转特性.xls
截面特性一.xls
截面特性二.xls
最优化问题.xls
最值问题.xls
牛顿法解方程.xls
矩阵运算.xls
线性拟合.xls
解线性方程组.xls
解线性方程组(二).xls
辛普森法积分.xls
频率与振型求解.xls
双变量模拟运算.xls
多元线性回归.xls
多项式拟合.xls
实例1.xls
实例2.xls
实例3.xls
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甚小天线地面站_VSAT_卫星通信系统高频本振信号源设计,pdf格式,阅读前请安装相应的阅读器。-Very small earth station antennas _VSAT_ high frequency satellite communications system design of the vibration signal source, pdf format, to read before you install the reader.
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该文借助振动信号模型直观地阐明瞬时频率的物理意义 引出固有模态的概念及其应满足的条件。
-The model with vibration signals directly to clarify the physical meaning of instantaneous frequency leads to the concept of intrinsic mode and its conditions should be met.
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本程序能够实现棒的横震动,而且在震动过程中能够计算出共振频率-This procedure can achieve the cross-bar vibration, but also in the process of vibration resonance frequency can be calculated
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传统的波形发生器采用模拟技术的方法,这种方法构成的波形发生器电路结构复杂,仅能产生正弦波、方波、锯齿波和三角波等几种简单波形。而现在在高科技领域,我们需要的可能是一些任意波形,如在保密雷达发波等军事方面和地震波形、汽车碰撞波形等模拟仿真应用方面。任意波形发生器现在被广泛用于自动控制系统、振动激励、仪器仪表领域。我国目前在这方面还比较落后,特别是在用DDS技术实现任意波形发生器方面。本课题我们打算用DDS技术基于FPGA核心板设计一个任意波形发生器。该仪器我们用LabVIEW来写的控制面板实现与F
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超声波振动原理,振动频率为10000赫兹,可以任意调节雾化时间,雾化开关及雾化量大小,符合医疗行业规范。(Ultrasonic vibration principle, vibration frequency of 10000 Hz, can arbitrarily adjust the a time, switch and amount, in line with the medical industry specifications.)
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