07.-Chapter-4---Fourier-Transform

cross corelation program matlab

MATLAB实现傅立叶变换求冲激响应、系统函数幅频特性(MATLAB realization of Fourier transform impulse response, amplitude frequency characteristics of the system function)

PGPI(NUM,DEN,W,FI,A) plots the stability boundary locus L(KP,KI,W)in the (KP,KI)-plane for an LTI system with transfer function defined by its NUM, DEN coefficients and driven by a PI controller with transfer function, C(s)=kp+(ki/s). Frequency (W) gridding becomes important. Phase Margin, FI, and Gain Margin, A, can be defined. The method works for open loop stable or unstable, minimum or nonminimum phase systems. With Examples. Method and examples used are form "Computation of Stabilizing PI and PID Controllers" by Nusret Tan, Ibrahim Kaya and Dereck P. Atherton. MATLAB release MATLAB 7.5 (R2007b)

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)

matlab源程序，计算系统的相关系数，用于系统各因素的影响度分析。(matlab source code, computing the correlation coefficient for the system factors analysis.)

matlab 基于PID控制器的BP神经网络系统的仿真(matlab PID controller based on BP neural network system simulation)

这个是基于matlab的维纳滤波设计，其中包括两个列子，一个是在时域实现滤波器，一个是在频域实现滤波器，两个列子都是对chirp信号进行处理的(there are two examples for weina filer desined in matlab ,one is achieved in frequency domain and another is achieved in time domain.the two weina filers are desined to remove noise from chirp.)

说明：  BP神经算法在系统中的辨识应用 应用MATLAB进行编程(BP network algorihm of identification)

this is simulink of permanent current DC machine in matlab

使用MVDR方法进行信号频率估计的matlab仿真代码(MVDR method using frequency estimation matlab simulation code)