頻帶展開制 的英文怎麼說
中文拼音 [bīndàizhǎnkāizhì]
頻帶展開制
英文
band spread system-
This paper starts the research of the liquid floated pendulous accelerometer testing system according to the engineering. at first, this paper gives the brief introduction of the history and present status of accelerometer and its testing technology, the working principium and math model of the liquid floated pendu - lous accelerometer, and then, decides the binary width pulse force retrim loop as the design proposal of testing system, researches the transfer function of every part in the system emphasizly, analyses the stability of the whole accelerometer testing system from the angle of control theoretics by the open loop transfer function of system, and designed the correcting net, analyses the basal problems such as resolution, sampling restraint, precision and so on, designs the hardware testing circuits such as preamplification, band - pass filter, alternating amplifier, phase sensitive demodulatorn, pulse - width modulation, frequency scale circuit, moment current generator. finally, using the graphics program language labv - iew which is designed for testing field especially by ni accomplishes the solfware design of testing system, realized the testing functions
首先對加速度計及其測試技術的發展歷史和現狀，液浮擺式加速度計的工作原理和數學模型等作了簡要的介紹，然後確定了以二元調寬脈沖再平衡測試迴路為設計方案，並從控制理論的角度進行了分析，著重研究了系統中各部分的傳遞函數，利用系統開環傳遞函數分析了系統的穩定性，同時設計了系統的校正網路;分析了二元調寬脈沖再平衡測試迴路的解析度、采樣約束以及測試精度等基本問題，並按照系統分析的結果設計了包括前置放大、帶通濾波、交流放大、相敏解調、脈寬調制、頻標電路以及力矩電流發生器等測試系統各部分硬體電路，驗證了電路的正確性，最後按照測試系統的要求，採用了美國ni公司專為測試領域所開發的虛擬儀器工具? ? labview作為測試軟體開發工具，利用該圖形化編程語言完成了測試系統軟體部分的設計，實現了測試功能。With the high accurate transfer function it is possible to design frequency characteristic compensator to eliminate the mechanic resonance frequency characteristic of the control object. the fast steering mirror system closed bandwidth is no longer restricted by the mechanic resonance frequency and the closed bandwidth is expanded effectively
在獲得對象的高精度傳遞函數以後，使用零極點對消的方法補償系統的機械諧振，有效地擴展了快速控制反射鏡系統的帶寬，使快速控制反射鏡系統的閉環帶寬不再受制於系統的開環諧振頻率。This paper divides into six chapters : the first chapter - base on the analyses of the origin, conception and development status of sr, this chapter discusses the key technology and realize difficulties of sr and advances the intention and meaning of the paper. the second chaptei - the sr system with radio frequency band - pass sampling architecture is a design scheme close to software wireless radio ( swr ), this chapter introduces three system architecture of sr system and analyses the theory of radio frequency band - pass sampling. the third chapter - this chapter analyses and designs the dsp hardware platform with radio frequency band - pass sampling architecture
本論文分為六章：第一章在分析軟體無線電的起源、概念、發展概況的基礎上，闡述了軟體無線電的關鍵技術及實現難點，提出了本論文研究的目的與意義；第二章射頻直接帶通采樣軟體無線電結構是接近理想化的軟體無線電設計方案，本章對軟體無線電系統的體系結構及射頻直接帶通采樣原理進行了分析；第三章分析並設計了射頻直接帶通采樣結構軟體軟體無線電系統的dsp硬體平臺；第四章研究了調制解調及信號調制樣式的識別演算法並給出了dsp實現，這是在dsp平臺上實現軟體無線電功能的一種常規方法；第五章分析了應用快速原型技術開發軟體無線電系統的必要性及可行性，完成了軟體無線電系統的matlab模擬及結合ti公司的tms320c6711dsk板的快速原型實現，這也是本論文提出的軟體無線電的一種新的研究方法。
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