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cheng-xu
- （1）认真复习第七章中用窗函数法和等波纹最佳逼近法设计FIR数字滤波器的原理； （2）调用信号产生函数xtg产生具有加性噪声的信号xt，并自动显示xt及其频谱，如图10.5.1所示； 图10.5.1 具有加性噪声的信号x(t)及其频谱如图 （3）请设计低通滤波器，从高频噪声中提取xt中的单频调幅信号，要求信号幅频失真小于0.1dB，将噪声频谱衰减60dB。先观察xt的频谱，确定滤波器指标参数。 （4）根据滤波器指标选择合适的窗函数，计算窗函数的长度N，调用MATLAB函
freqresponse
- 计算平面桁架的频响函数，求得某一节点的速度，加速度。-Frequency response function calculation plane truss, a node obtained velocity and acceleration.
IIR-
- 低通IIR数字滤波器设计，用数字滤波器的单位脉冲响应序列h(n)模仿模拟滤波器的冲激响应ha(t),令 h(n)=ha(nT)，其中T为采样间隔。将模拟滤波器转换成数字滤波器的实质是，用一种从s平面到z平面的映射函数将Ha(s)转换成H(z)。数字滤波器的频率响应模仿模拟滤波器的频响，s平面的虚轴映射z平面的单位圆，相应的频率之间成线性关系。-Low-pass IIR digital filter design
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- 根据滤波器指标选择合适的窗函数，计算窗函数的长度N，调用MATLAB函数fir1设计一个FIR低通滤波器。并编写程序，调用MATLAB快速卷积函数fftfilt实现对xt的滤波。绘图显示滤波器的频响特性曲线、滤波器输出信号的幅频特性图和时域波形图。
Suspension-with-Four-Free-Dimension
- 四自由度悬架的建模及自由振动频率求法、半波输入响应、受迫振动响应、频响函数响应、自由振动响应-Modeling and four degrees of freedom suspension method for finding free vibration frequency, half-wave input response, forced vibration response, frequency response function response, free vibration resp
chuang
- 用MATLAB软件实现带通，低通，高通滤波器的窗函数的频率响应，观察频响特点-MATLAB software band-pass, low pass, high pass filter window function frequency response, the observed frequency response characteristics
FRF_find
- 提取nastran“.f06”结果中的节点频响函数数据，可简单修改提取模态频率和 其它数据-Extract nastran, " f06" results in the the node frequency response function data, can be simple modification to extract the modal frequencies and other data
fft
- 这是进行matlab的fft频响函数估计，它可以进行随机激励的频响估计-this is a program which is fft analysis it can uate frf that is random exict
vibra_motaipinyu
- matlab实现试验模态频域参数识别：导纳圆法和最小二乘法（复模态—频响函数实虚部） -matlab achieve experimental modal parameter identification in frequency domain: admittance circle method and the least squares method (complex modal- FRF real and imaginary parts)
frequency-response
- 求梁的频响函数, 梁的频响函数, - frequency response
chengxu
- 求频响函数的实频、虚频、幅频、相频及Nyqiust图-Strives for the frequency response function of the real or imaginary frequency, amplitude frequency and phase frequency and Nyqiust figure
Per_spectrum
- 不同窗函数数下，自功率谱，互功率谱，频响函数和相干函数，绘制功率谱图-Not under the old function, since the power spectrum, cross-power spectrum, frequency response function and coherence function, map power spectrum
Distributed Tansfer Function Method
- 利用分布参数系统的传递函数法对带有扩展层的约束阻尼梁进行编程分析，得到频率响应曲线，并获得位移峰值对应的频率，即固有频率。(The transfer function method of distributed parameter system is used to analyze the constrained damping beam with extended layer, and the frequency response curve is obtained, and the freq
testFilter
- 系统传输函数测试，使用扫频法测试已知系统的频响特性并绘制相关的频响图(System transfer function test, frequency sweep method is used to test the frequency response characteristics of the known system, and to draw the relevant frequency response diagram)