Signal power spectrum based on FFT

用labview实现实时的采集数据，并且可以存储数据到文件中(Realization of real-time data with LabVIEW, and can store data to a file)

使用labview来采集声音及处理，三分之一倍频等(Acquisition of voice and processing)

说明：  基于NI的LABVIEW开发平台的谐波分析(Harmonic Analysis of LABVIEW Development Platform Based on NI)

利用LabVIEW的Active X模块以及STK的Connect 模块实现两种软件交互的方法，通过LabVIEW 的Active X功能连接STK，利用Connect模块中的指令驱动STK产生卫星的相关数据，最终将有关数据返回至Lab VIEW中并显示出来，实现了Lab VIEW与STK的无缝连接(Design of a Satellite Orbit Prediction Visualization Platform Based on Lab VIEW and STK A method of designing a satellite orbit prediction visualization platform based on a hardware-in-loop validated simulation system of small satellite is introduced． Satellite Tool Kit is an analysis software widely used in simulating orbit system for satellite ， but STK can’t accomplish the relevant function that acquired by the hardware- in-loop validated simulation system mentioned． Based on this requirement ， a method of using Active X technology in Lab VIEW and STK/Connect module to interact the two kinds software is introduced． Through calling STK and u- sing Connect module in STK to obtain the relevant data ， finally all the datas in need within a window synchronously can be displaied ， which realized the connection between Lab VIEW and STK ， also accomplished the relevant func- tion and has a applied value． )

应变的采集显示，可实现多通道的显示，包括图形、数据，有相应的操作界面等(strain aquistion)

KNR的电机驱动与控制，实现电机的正反转，读取编码器的读数，设置电机的速度，读数位置。 需要有KNR（贝登堡公司生产）(With the KNR driver control motor, to achieve positive motor, read the encoder readings, set the speed of the motor, reading position. The need for KNR (Baden Powell company))

Code to calculate the Fast Fourier Transform

自功率谱是分析非平稳信号频谱的重要手段。对于非平稳信号来说，利用自功率谱分析能够更容易找到信号中能量聚集区域，对信号中的频率分布有更好的了解。本文件中将其制作成独立子VI方便程序直接调用。(Self power spectrum is an important method to analyze the spectrum of non-stationary signals. For non-stationary signals, it is easier to find the energy accumulation region in the signal by using self power spectrum analysis, and better understand the frequency distribution in the signal. This document will be made into an independent sub VI convenience program to call directly.)

说明：  界面上可实现新增用户，删除用户，修改密码，及验证用户名和密码(The interface can be used to add users, delete users, modify passwords, and verify user names and passwords)

USB设备数据读取，将USB中数据保存到电脑上(USB device data read, save the data from USB to the computer)