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航空航天通信技术一般采用模拟通信的频率调制和数字通信的移相键控调制方法。这有利于充分应用信道带宽和能源。频率调制是在一定程度上改变载波或副载波的频率来传输信息的调制方法。移相键控调制是利用载波或副载波的相位跳变来传输信息的调制方法。移相键控又分二相移相键控、四相移相键控和多相移相键控，其中以四相移相键控和八相移相键控调制方法的效率较高(Aerospace communications technology commonly used analog communication of frequency modulation and the digital communication phase shift keying modulation method. This is helpful for making full use of channel bandwidth and energy. Frequency modulation is changed to some extent carrier or subcarrier frequency to transmit information modulation method. Phase shift keying modulation is the use of carrier or subcarrier phase jump to transmit information modulation method. Phase shift keying and binary phase shift keying, four phase shift keying and multiple phase shift keying, of which four phase shift keying and eight phase shift keying modulation method of high efficiency )

随机数曲线例程，利用libview进行随机数曲线仿真计算(number of random graphs)

本系统可做自动控制原理中的时域分析仿真实验，系统特性如下： 1：可选择仿真系统为一阶、二阶、任意阶 2：可选择信号源为正弦波、三角波、锯齿波、方波（可模拟阶跃信号），并可调节信号源频率、幅值、相位、偏移、方波占空比 3：可选择信号采样率及采样数 4：自动计算传递函数 5：自动计算时域响应参数（增益系数、上升时间、峰值、峰值时间、稳定时间、超调量） 6：波形图同时显示原始信号和响应信号 注：使用本系统需安装labview控制设计与仿真库(The system can do automatic control theory in the time-domain analysis simulation, the system behaves as follows: 1: simulation system can be selected for the first, second, any order 2: select the signal source is a sine wave, triangle wave, sawtooth, square wave (analog step signal), and can adjust the signal source frequency, amplitude, phase, offset, duty cycle square wave 3: the the optional signal sampling rate and the number of samples 4: automatic calculation of the transfer function 5: Automatic calculation domain response parameters (gain coefficient, rise time, peak, peak time, settling time, overshoot) 6: waveform diagram shows both the original signal and the response signal Note: Use the system to be installed LabVIEW Control Design and Simulation library)

Labview电子书 Labview编程样式(Labview e book Prentice Hall - The LabVIEW Style book)

自从NI-DAQmx 发布以来，NI 数据采集(DAQ)用户就充分利用了它的许多特性，这些特性是为节省开发 时间和提高数据采集应用程序的性能而设计的。 一个能节省相当大一部分开发时间的特性是NI-DAQmx 应用程序编程接口（API），它在各种设备功能 和设备系列中都是相同的。这就意味着一个多功能设备的所有功能可由同样的函数集编程得到（模拟输 入、模拟输出、数字I/O 和计数器）。而且，一个数字I/O 设备和一个模拟输出设备都可使用相同的函 数集编程得到。在LabVIEW 中，由于多态机制，因而这是可以实现的。一个多态的VI 接受各种数据类 型以用于一个或多个输入和/或输出终端。NI-DAQmx API 在它所支持的所有编程环境中也是保持一致 的。您仅仅需要学会如何使用一个单一的函数集就可以在多种编程环境中对大部分NI 数据硬件进行编 程。 (Since the release of NI-DAQmx, NI data acquisition (DAQ) users take full advantage of its many features, these characteristics are developed in order to save Time and designed to improve the performance of data acquisition applications. A large part of the development time-saving features a NI-DAQmx application programming interface (API), which function in a variety of equipment And equipment series are the same. This means that all the functions of a multifunction device by the same set of functions programming (analog input Into, analog output, digital I/O and counter). Moreover, a digital I/O device, and an analog output device can use the same letter Number set programming to get. LabVIEW, polymorphism, and thus can achieve. A polymorphic VI to accept a variety of data classes Type for one or more input and/or output terminals. NI-DAQmx API it supports all programming environment is consistent s. You just need to learn how to use a single set of functions can)

labview 控制安捷伦电源Agilent E3648A(Control Agilent power supply Agilent E3648A)

这个程序可以实现两个串口直接的通信，labview(This program can realize two serial communication directly)

说明：  密码登录系统，基于Access数据库开发，支持管理员、普通用户创建，普通用户只能登录，管理员可对用户进行管理，包括增加用户，删除用户，修改用户等，该系统可移植到任何开发的labview软件，实用性强。(Password login system, based on access database development, supports the creation of administrators and ordinary users. Ordinary users can only log in. Administrators can manage users, including adding users, deleting users, modifying users, etc. the system can be transplanted to any developed LabVIEW software, with strong practicability.)

说明：  在Labview前面板中输入任意三个数，可比较得出最大值，并输出显示。(Enter any three numbers in the front panel of Labview to get the maximum value and output the display.)

滚动轴承的故障诊断程序，可实现在线诊断和自动识别(Rolling bearing fault diagnosis)