本文關(guān)鍵詞： DDS 常規(guī)波形 李薩如圖形 SPWM波 模擬調(diào)制波　出處：《寧夏大學(xué)》2017年碩士論文　論文類型：學(xué)位論文

【摘要】：由于當(dāng)今電子技術(shù)的快速進(jìn)步,在一些領(lǐng)域內(nèi)所需的信號越來越復(fù)雜,單一的信號合成已經(jīng)不能滿足人們的需要,為此人們開始關(guān)注于一些復(fù)雜的信號,以此來滿足不同領(lǐng)域的需求。首先,本課題對傳統(tǒng)頻率合成器以及直接數(shù)字頻率合成器(DDS)的原理進(jìn)行了說明,并對它們各自的優(yōu)缺點(diǎn)進(jìn)行簡要的分析,總結(jié)了 DDS的工作特點(diǎn)、頻譜分析,并著重對非理想情況下的雜散進(jìn)行了深入的解析。其次,隨著現(xiàn)場可編程門陣列(Field—Programmable Gate Array)的高速發(fā)展,人們越來越關(guān)注其應(yīng)用。因此本文對FPGA的發(fā)展過程、硬件的開發(fā)環(huán)境、硬件描述語言(主要是VHDL語言和Verilog HDL語言)以及FPGA的開發(fā)流程進(jìn)行了詳細(xì)的介紹。本文在深入研究直接數(shù)字頻率合成技術(shù)的基礎(chǔ)上,通過VHDL硬件描述語言對DDS的構(gòu)成部分進(jìn)行了設(shè)計(jì),并且通過DDS技術(shù)產(chǎn)生了不同的波形。該技術(shù)可以生成正弦波、鋸齒波、方波、三角波等四種普通信號,在物理實(shí)驗(yàn)室中經(jīng)常遇見的李薩如圖形,電力電子技術(shù)中的控制信號SPWM波,以及模擬調(diào)制波中的AM、FM、PM波形,并且對各自的工作原理和數(shù)學(xué)模型進(jìn)行了詳細(xì)說明。通過Quartus II軟件設(shè)計(jì)了它們各自的模塊并實(shí)現(xiàn)模塊化,并對各個波形模塊進(jìn)行了仿真。最后,將完成的各個模塊下載到FPGA芯片中進(jìn)行驗(yàn)證。最后,通過對波形合成的驗(yàn)證,以及示波器顯示的各種波形形狀與其相應(yīng)的原理產(chǎn)生的波形基本相似,表明了該方案的可行性。
[Abstract]:Due to the rapid progress of electronic technology, the signals needed in some fields are becoming more and more complex, the single signal synthesis can not meet the needs of people, so people begin to pay attention to some complex signals. In order to meet the needs of different fields. Firstly, the principle of traditional frequency synthesizer and direct digital frequency synthesizer (DDS) is explained, and their advantages and disadvantages are analyzed briefly. This paper summarizes the work characteristics of DDS, spectrum analysis, and focuses on the non-ideal case of stray in-depth analysis. Secondly. With the rapid development of Field Programmable Gate Array (Field-Programmable Gate Array). People pay more and more attention to its application. Therefore, this paper discusses the development process of FPGA and the hardware development environment. Hardware description language (mainly VHDL and Verilog HDL). And the development process of FPGA is introduced in detail. This paper deeply studies the technology of direct digital frequency synthesis (DDS). The components of DDS are designed by VHDL hardware description language, and different waveforms are generated by DDS technology, which can generate sine wave, sawtooth wave and square wave. There are four kinds of common signals, such as triangle wave, Lisaru figure, control signal SPWM wave in power electronics and analog modulation wave, which are often encountered in physics laboratory. Their working principles and mathematical models are explained in detail. Their modules are designed and modularized by Quartus II software. Finally, the completed modules are downloaded to the FPGA chip to verify. Finally, through the waveform synthesis verification. All kinds of waveforms displayed by oscilloscope are similar to the corresponding waveforms, which shows the feasibility of the scheme.
【學(xué)位授予單位】：寧夏大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：TN791;TN741

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本文編號：1464856