The experiments also show that the new circuit can deal with the four basic waveforms rightly and has the advantage of high resolution , high capability of rejecting noise , simplicity , and so on 實(shí)驗(yàn)表明:新鑒相電路能正確處理四種基本波形,且具有分辨率高、噪聲抑制能力強(qiáng)、電路簡(jiǎn)單等優(yōu)點(diǎn)。
Test results show the proposed method is simple and effective , and in particular it can terminate encoding / decoding at any point and still produce a signal close to the original one 仿真結(jié)果表明該算法對(duì)電力系統(tǒng)故障數(shù)據(jù)的壓縮十分有效,并且實(shí)現(xiàn)簡(jiǎn)單,在任意點(diǎn)中斷編解碼不會(huì)影響算法重構(gòu)出基本波形。
The method to get the parameters for each basic waveform was given by choosing the sine window function waveform as the basic waveform , and based on the srs time - history synthesis principle 依據(jù)沖擊響應(yīng)譜時(shí)域合成的一般原則,選擇合成小波中的正弦窗波作為基本波形,給出了確定各基本波形的波形參數(shù)的方法。
Therefore , it has been widely used in the domains of communication , radar , navigation , etc . this article focuses on the generating of the function waves which include sine wave , triangle wave and square wave , depict the concepts of dds ( direct digital synthesis ) and surveying frequency on equal precision , analyze the key techniques in the development and present solutions of function generator . author also present the system structures of hardware and software , discuss the performance indexes and consider the possibility of the system . finally , with respect to the problems in debugging and testing process , author do some analyzing and present the practical solutions 本文主要圍繞函數(shù)發(fā)生器輸出的正弦、三角和方波三種基本波形的產(chǎn)生這一課題來展開,闡述了其中的直接數(shù)字合成( dds ) 、等精度測(cè)頻等概念;分析了研制函數(shù)發(fā)生器所需攻克的關(guān)鍵技術(shù),提出了技術(shù)解決途徑;對(duì)方案軟件進(jìn)行編制和系統(tǒng)進(jìn)行設(shè)計(jì)、安裝調(diào)試,實(shí)現(xiàn)了課題功能;最后針對(duì)調(diào)試中出現(xiàn)的問題,進(jìn)行了較深入的分析,并提出了實(shí)際的解決措施。
Firstly , computer model of mdrlg is set up for simulation purpose . by simulation about the two output signals of mdrlg , four basic waveforms between the two signals in lock - in area are found out and the fact is discovered that the old phase - demodulation circuit introduces errors when it is used for demodulating two of the four basic waveforms 本文首先建立了機(jī)抖陀螺的計(jì)算機(jī)仿真模型,利用該模型對(duì)陀螺兩路計(jì)數(shù)信號(hào)及原有鑒相電路進(jìn)行了仿真,發(fā)現(xiàn)兩路計(jì)數(shù)信號(hào)過鎖區(qū)時(shí)存在四種基本波形,且原有鑒相電路對(duì)其中兩種波形產(chǎn)生鑒相誤差。