【正文】 本 科 生 畢 業(yè) 論 文題 目： 基于 LabVIEW 的經(jīng)典控制系統(tǒng)研究 i 摘 要近幾十年來，隨著虛擬儀器的發(fā)展，虛擬儀器技術本身的內涵不斷豐富，外延不斷擴展，徹底打破了傳統(tǒng)儀器只能由生產廠家定義，用戶無法改變的局面。虛擬儀器代表著從傳統(tǒng)硬件為主的測量系統(tǒng)到以軟件為中心的測量系統(tǒng)的根本性轉變。LabVIEW（Laboratory Virtual Instrument Engineering Workbench，實驗室虛擬儀器工程平臺）作為虛擬儀器的先鋒代表，由于其卓越的人機界面、強大而易于實現(xiàn)的數(shù)據(jù)采集功能，和框圖的程序編寫過程，開始越來越多的應用到控制設計領域。本文在 LabVIEW 的基礎上，研究了控制系統(tǒng)的各一些特性。簡單介紹了虛擬儀器以及LabVIEW 后，首先分析了典型二級系統(tǒng)的一些特性。其次對一個被控二階系統(tǒng)的數(shù)學建模，并分析被控系統(tǒng)模型的時域特性，頻域特性，開環(huán)特性。然后研究了一個時滯系統(tǒng)的時域特式性及頻域特性。最后研究了使用 LabVIEW 進行 PID 控制器的設計并對動態(tài)控制系統(tǒng)進行了離線仿真。關鍵詞： LabVIEW；虛擬儀器；二階系統(tǒng)；時滯系統(tǒng)；系統(tǒng)仿真Abstract ii In the recent several dozens years,with the development of the Virtual Instrument, the connotation of Virtual Instrument technology has been enriched day by day, and its extension has also Virtual Instrument means that the focus of measure systems has been changed from traditional hardware to software. As the pioneer of Virtual Instrument,LabVIEW(Laboratory Virtual Instrument Engineering Workbench）begins to enter the control design field,for its excellent humanputer interface, powerful and easily realized data acquisition function and graphical programming process ability.Based on the LabVIEW, some of the control system’s characteristic was discussed in this of all, some of the model secondorder control system’s characteristic was discussed, ,after a simple introduction of the Virtual Instrument and , developing and analyzing a mathematical model of asecodforder control its time domain characteristic,frequency domain characteristic and Splitring characteristic was ,a timelag system’s time domain characteristic and frequency domain characteristic was also discussed. At last, a PID controller’s parameters was designed,and a dynamic control system’s offline simulation was performed.Keywords: LabVIEW。Virtual Instrument。secondorder system。timelag system。System simulation iii 目 錄第一章 前言 .........................................................................................................................................1 本文的研究背景 ...............................................................................................................1 本文主要內容結構 ...........................................................................................................1第二章 虛擬儀器及 LABVIEW 簡介 ...............................................................................................3 虛擬儀器 ...........................................................................................................................3 虛擬儀器的由來 ................................................................................................3 虛擬儀器的概念 ................................................................................................4 虛擬儀器功能 ....................................................................................................5 LABVIEW 概述 ................................................................................................................5 LABVIEW 程序設計基礎 ................................................................................................7 本章小節(jié) ...........................................................................................................................8第三章 二階控制系統(tǒng)分析 .................................................................................................................9 典型二階系統(tǒng) ...................................................................................................................9 二階系統(tǒng)的數(shù)學建模 .....................................................................................................12 二階系統(tǒng)建模 ..................................................................................................12 傳遞函數(shù)模型 ..................................................................................................13 零極點－增益模型 ..........................................................................................14 系統(tǒng)時域響應分析 .........................................................................................................15 階躍響應分析 ..................................................................................................15 脈沖響應分析 ..................................................................................................17 初始響應分析 ..................................................................................................18 系統(tǒng)頻率響應分析 .........................................................................................................19 系統(tǒng) Bode 頻域分析 .......................................................................................19 系統(tǒng) Nichols 頻域分析和 Nyquist 穩(wěn)定性分析 .............................................22 開環(huán)特性分析 .................................................................................................................24 本章小結 .........................................................................................................................25第四章 時滯系統(tǒng)特性 .......................................................................................................................26 延時信息的合并 .............................................................................................................26 時域特性 .........................................................................................................................27 頻域特性 ....................