frft2

8051 BASED INTERFACE CCTALK PROTOCOL WITH CASHFLOW ACCEPTORS

可以计算临界转速，书上的一个例子，可以看看(Calculating Critical Speed)

主要用于振动信号的频谱分析，用于判断信号中的故障频率(the fft analysis of the vibration signal)

搭建完整的双馈风力发电系统，模拟网侧控制和转子侧控制，观察电压跌落情况下，双馈风力系统的变化(A complete doubly fed wind power generation system is developed to simulate the grid side control and the rotor side control, and to observe the change of DFIG wind system under voltage sag)

实现对地震信号 的频谱分析，达到滤波、去噪、提高分辨率等的作用(To realize the spectrum analysis of seismic signals, to achieve the function of filtering, denoising and improving resolution.)

PT2313驱动代码，多应用于音频消费电子类IC。(PT2313 driver code,Multi-application in audio consumer electronic IC.)

说明：  EDEM默认压力模型，用于学习API编写(Edem default stress model for learning API writing)

ATP-EMTP直流输电环形接地极等效电路法仿真计算接地电阻模型(Equivalent circuit method of ATP - EMTP DC transmission ring ground electrode simulation calculation of grounding resistance model)

说明：  恒压变频供水，实现供水的恒压变频，可以恒压供水，并且可以通过变频器节能(niceConstant voltage and frequency conversion water supply can realize constant voltage and frequency conversion of water supply, water supply can be constant pressure, and energy saving can be achieved through frequency converter.)

说明：  abaqus建立三维椭球模型，主要用于有限元细观力学分析，建立几何模型(Abaqus establishes 3d ellipsoid model, which is mainly used for finite element mesomechanical analysis and geometric model establishment)