基于LabVIEW的工频信号采样分析与仿真

基于LabVIEW的工频信号采样分析与仿真

文档编号:DQ025 文档字数:10768,页数:30

摘要

软件同步是数字化测量工频信号常用的采样方法。国内学者在工频周期信号的软件同步采样方面做了大量卓有成效的工作, 提出比较典型的采样方法有: 双速率同步采样法、偏差累积增量法、参数自寻优等间隔同步采样法等。
本毕业设计通过美国NI公司推出的虚拟仪器开发平台软件LabVIEW作为编程环境，LabVIEW是通用的编程系统，有一个完成任何编程任务的庞大函数库。LabVIEW采用图形化编程语言--G语言进行编程，这种编程方法使枯燥的编程变的有趣。
本文首先阐述了编程环境的选择，然后讨论三种采样法的主要算法，并通过图形编程把这三种算法在LabVIEW中实现。详细论述了三种同步采样法的思路和主要的运算方法，并讨论了这些算法的一些改进措施。

关键字：同步采样工频信号 LabVIEW 运算方法

Abstract

Synchronization software is measuring the frequency of digital signals commonly used sampling methods. Mainland scholars in the frequency signal cycle of software synchronous sampling done a lot of fruitful work, a more typical sampling methods: Double-rate synchronous sampling method, the error accumulated incremental method, parameter self-synchronous sampling interval Excellence in Law.
The graduation project launched by the United States NI virtual instrument software development platform as LabVIEW programming environment, LabVIEW is a common programming system, there is a complete any of the huge task of programming functions. LabVIEW using graphical programming language - G programming language, this programming method to change the programming boring interesting.
This paper described the programming environment of choice, and then discuss three main method of sampling method, and through these three kinds of graphical programming in LabVIEW algorithm to achieve. Discusses in detail the three synchronous sampling of the main ideas and methods of operation, and discussed some of these algorithms improvement measures.

Keywords: simultaneous Sampling , the frequency signal , LabVIEW,algorithms

摘要 - 1 -
Abstract - 2 -
1．引言 - 4 -
1.1 背景 - 4 -
1.2 研究内容 - 5 -
2.编程环境 - 5 -
2.1虚拟仪器简述 - 5 -
2.2 LabVIEW简述 - 7 -
2.3 Labview的优势 - 7 -
3 三种同步采样法 - 10 -
3.1 双速率同步采样法的研究 - 11 -
3.1.1 双速率同步采样法 - 11 -
3.1.2 改进的双速率同步采样法 - 11 -
3.2 偏差累积增量法的研究 - 12 -
3.2.1 偏差累积增量法 - 12 -
3.2.1 改进的偏差累积增量法 - 12 -
3.3 采样参数自寻优的研究 - 13 -
3.3.1 采样参数自寻优 - 13 -
3.3.2 校正参数自寻优 - 14 -
4 三种算法在LabVIEW中的实现 - 15 -
4.1 模拟信号产生 - 16 -
4.2 双速率采样法 - 19 -
4.3 偏差累积增量法 - 21 -
4.4 参数自寻优采样法 - 22 -
5 三种同步采样法的比较分析 - 26 -
6总结 - 28 -
致谢 - 29 -
参考文献 - 30 -

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