synchronous digital system 中文意思是什麼

synchronous digital system 解釋
同步數字系統
  • synchronous : adj. 同時的，同期的；【物理學】同步的。adv. -ly
  • digital : adj. 1. 手指的；指狀的。2. 數字的，數據的。n. 1. （鋼琴等的）琴鍵。2. 手指。
  • system : n 1 體系，系統；分類法；組織；設備，裝置。2 方式；方法；作業方法。3 制度；主義。4 次序，規律。5 ...
  1. In this paper, research on the algorithm of complete digital if and baseband transmission system and the realization of transmitter and receiver. / 4 - dqpsk is chosen as digital modulation scheme. the scheme of demodulation is baseband differential detection. sliding correlator can realize the symbol synchronous acquisition ; early - late gate synchronizer is used to do symbol synchronous tracking

    系統的發射機選定/ 4 - dqpsk為調制方式，接收機採用基帶差分解調的非相干解調方式，滑動相關器捕獲發送的pn序列，早遲門同步器跟蹤符號同步，使用相關器對同步后的符號進行最佳判決，並在這些演算法實現的基礎上，實現了直接序列擴頻和解擴技術。
  2. The system stores spatial data and characteristic data into central database, and provides services to users in server / client mode. as the research emphases of this thesis, several key sub - systems are designed and realized. the digital map input and maintenance subsystem performs format conversion, editing and updating of spatial data ; the rail - track video playing subsystem uses video recording as reference data, then plays, inquires and traces the corresponding frames in synchronous to the scaled mileage, realizing the query of the active picture frames ; the digital map query subsystem fulfills the map query, preview and spelling of digital map orthograph

    其中，地形圖輸入與維護實現了數字地圖的格式轉換、編輯處理以及空間數據的更新操作，解決了不同格式空間數據的互相轉換問題；線路錄象播放將線路錄像數據作為系統的一種索引數據，活動影像的畫面與里程相對應，實現了基於線路錄像的播放、查詢和檢索的功能，實現了基於活動畫面的查詢檢索功能；數字地圖子系統完成了圖形查詢、數字地圖與線路正射圖像瀏覽、圖幅拼接等功能。
  3. Based on the traditional model of vibrat ory machines ， an electrome chanical - coupled model of motor - vibrator y machine system is established, and a reasonable quantitative expla ining of engineering phenomena in transi ent processes is given by digital simula tion according to it. the, mechanism of self - synchronous vibration, and vibratory synchronization transmissi on is proposed in this paper

    本文對此進行了專門的研究，在傳統的振動機械模型基礎上建立了電機-振動機械繫統的機電耦合模型，利用該模型進行數值模擬對過渡過程中的一系列實際現象做出了合理的定量解釋，揭示了自同步振動和振動同步傳動的機電耦合機理。
  4. The subject has mainly finished designing and debugging software and hardware of a / d decode module, fpga video processing module, video data frame deposit module, base clock produce module, d / a encode module, i2c bus control module, etc. a / d decode module gathers analog tv signals and realize video decode ; fpga video processing module deals with the data after decoding and produces systematic logic control signal ; video data frame deposit module offers the buffering area to a large n umber of high - speed video data ; base clock produce module through input basic video signal offers system accurate relevant synchronous signal ; under control of video processing module d / a decode module convert digital video data into compound tv signal which can be shown in tv directly ; i2c bus control module is used to initialize the chip of system by simulating i * c bus timing

    本課題主要完成了a d解碼模塊、 fpga視頻處理模塊、視頻數據幀存模塊、基準時鐘產生模塊、 d a編碼模塊、 i ~ 2c總線控制模塊等部分軟、硬體設計及調試。其中a d解碼模塊採集模擬電視信號實現視頻解碼； fpga視頻處理模塊對解碼后的數據進行去噪處理的同時還負責系統的邏輯控制；視頻數據幀存模塊為大量高速的視頻數據提供緩沖區；基準時鐘產生模塊通過輸入基準視頻信號為系統提供精確的相關同步信號； d a編碼模塊在視頻處理模塊的控制下把數字視頻數據轉換成復合電視信號供顯示用： i ~ 2c總線控制模塊模擬i ~ 2c總線時序實現對系統中編、解碼晶元的初始化。
  5. A arming control system of synchronous fitting missle is brough forward in this paper of which the arming control unit composes of the high speed digital signal processing chip dsp and fpga, and has better performance in speed and precision

    本文提出了一種雙聯裝導彈瞄準系統，其瞄準控制部分由高速數字信號處理晶元dsp和現場可編程門陣列fpoa構成，使得整個系統在速度和精度方面都具有較好的性能。
  6. Digital control system of permanent magnet synchronous motor in electric vehicle drive

    電動汽車驅動用永磁同步電機數字控制系統
  7. Bits supplies the synchronous timing signal to these equipments inside the telecommunicationt building, such as dps, atm, no. 7, dxc, tm & adm in sdh, don and in etc. the related techniques are involved in the content of synchronization ne twork, timing distribution, the timing signal transportations x impairments etc. the second chapter tells the structure and the function of the building integrated timing system. the third chapter summarizes the digital synchronization network techniques, which emphasizes the basic concept of synchronization networks analyzes the necessity of building the synchronization network and introduces all kinds of synchronization methods. the fourth chapter represents the transportation of the synchronization signal

    本文第二章講述了通信樓綜合定時系統的構成及作用：第三章概述了數字同步網技術，著重描述了同步網的基本概念，分析了建立同步網的必要性，講述了各種同步方法；第四章闡述了同步定時信號的傳輸；第五章介紹了bits設備所支持的同步狀態消息；第六章、第七章為本文的重點，通過對時鐘信號建立數學模型，從理論上分析時鐘內部噪聲和相位瞬變產生時鐘定時信號損傷的原理，企圖尋找到更好地控制頻率漂移的方法。
  8. This thesis comes from the technological innovation project 2002 in xi ' an. the research is focused on the adaptive hybrid excitation synchronous generator system with constant output voltage. in order to keep the output voltage constant, the adaptive control is introduced in the digital voltage regulator of the generator system

    本課題來源於2002年西安市重大技術創新工程計劃?自適應復合勵磁恆壓同步發電機系統的研究，通過採用數字電壓調節器對復合勵磁同步發電機的自適應控制，實現發電機的恆壓發電輸出。
  9. In the dissertation, a novel hybrid excitation constant voltage synchronous generator is adopted to improve the system performance, which takes the advantages of both electrical excitation and permanent magnet machines. a parted configuration is presented in order to design the structure of the generator. the adaptive digital adjustment is settled in principle using the single chip microcomputer 80c31 as the control core of the voltage regulator and adopting the proportion - integral - differential control as the control arithmetic, then a sample is made

    論文對同步發電機的工作原理、性能特點、電機本體以及電壓調節器的硬體和軟體設計進行了研究，針對稀土永磁同步發電機變載、變轉速情況下輸出電壓不可調的不足之處，採用一種新穎的電機型式? ?自適應復合勵磁恆壓同步發電機，綜合了永磁發電機和電勵磁發電機的優點，提出一種磁路分開的結構進行電機本體的設計，並選用單片機80c31作為電壓調節器的控制核心，比例?積分?微分控制（ pid ）作為其控制演算法，從原理上較好地解決了其電壓的自動數字調節，並試制了一臺樣機。
  10. Aim at the dtc ' s blemish mentioned above and the direction of dtc technique development, the dissertation put great emphasis on the work as follows, with an eye to exalt dtc system function : ( 1 ) a new speed - flux observer of an induction motor is proposed to enhance the accuracy of flux observing, which is an adaptive closed - loop flux observer and different from the traditions. a new adaptive speed - observation - way is deduced out according to the popov ' s stability theories ; ( 2 ) to improve the performance of dtc at low speed operation, we have to exalt the accuracy of the stator flux estimation and a new way of bp neural network based on extended pidbp algorithm is given to estimate and tune the stator resistance of an induction motor to increase the accuracy of the stator flux estimation ; ( 3 ) digital signal processor is adopted to realize digital control. an device of direct torque control system is designed for experiment using tms320lf2407 chip produced by ti company ; ( 4 ) bring up a distributed direct torque control system based on sercos bus, sercos stand for serial real time communication system agreement which is most in keeping with synchronous with moderate motor control ; ( 5 ) the basic design frame of the hardware and software of the whole control system is given here and some concrete problem in the experiments is described here in detail

    針對上面提到的直接轉矩控制的缺陷和未來直接轉矩控制技術發展方向，本論文重點做了以下幾個方面的工作，目的在於提高dtc系統的綜合性能： （ 1 ）提出一種新型的速度磁鏈觀測器，新型的速度磁鏈觀測器採用自適應閉環磁鏈觀測器代替傳統的積分器從而提高磁鏈觀測的精度，並且根據popov超穩定性理論推導出轉速的新型自適應收斂律； （ 2 ）改善系統的低速運行性能，主要從提高低速時對定子磁鏈的估計精度入手，提出了一種提高定子磁鏈觀測精度的新思路? ?利用基於bp網路增廣pidbp學習演算法來實時在線地修正定子電阻參數； （ 3 ）採用數字信號處理器dsp實現系統全數字化硬體控制，結合ti公司生產的tms320lf2407晶元，設計了直接轉矩控制系統的實驗裝置； （ 4 ）提出了基於sercos總線網路化分散式的直接轉矩控制系統， sercos （ serialrealtimecommunicationsystem ）是目前最適合同步和協調控制的串列實時通信協議； （ 5 ）基本勾勒出整個控制系統的硬體和軟體設計基本框架，詳細描述一些實驗中的具體的細節問題。
  11. The full automatic mechanical arm is built for letoff and wrap - up systems. the extruding quantities of each unit are controlled by frequency motor, the forming system adopts the synchronous group control. the digital displays are used for letoff, wrapup, extruding, drawing, line speed and meter recording

    放卷、收卷設置機械手全自動控制；各組擠出量由變頻器控制電機來完成，成型系統由一臺變頻器群控三臺成型牽引電機，與機械配合達到同步，該設備的放、收卷、擠出、牽引、線速、計米全部由數字化顯示。
  12. The role and application prospects of synchronous clock system of digital network in guangdong power system are briefly described, and some proposals for its construction and planning are presented as well

    簡述了數字同步時鐘系統在廣東省電力系統的作用與應用前景，並對廣東省電力數字同步時鐘系統的建設與規劃提出了若干建議。
  13. This paper presents a design method of an off - line portable scanner, which can be used without computer. we discuss the system based on a synchronous digital signal processor with multicenter, which is used to gather data with high speed. ti ' s tms320vc5402 is a sixteen - bit fix processor, and we make it the core of our control system

    本文提出了一種能夠脫機使用的便攜式掃描儀的設計思想，論述了高速多通道同步dsp數據採集系統，以高性能的tms320vc5402十六位定點dsp為核心，充分利用其強大而高速的數據處理能力對採集的數據進行復雜的運算，並快速以圖形方式輸出處理結果。
  14. By adopting qam ( quadrature amplitude modulation ) modulation, we have researched and implemented a high - speed data broadcasting system compatible with dvb ( digital video broadcasting ) standard in the past years, and integrated and applicated the system into sdh / hfc ( synchronous digital hierarchy / hybrid fiber coax ) network for the first time in china

    經過多年的研究，開發出了符合dvb標準、採用qam調制方式的陽光網高速數據廣播系統，同時在國內首次實現了基於sdh hfc網路的高速數據廣播系統集成應用。
  15. Fpga design and implement of frame synchronous scheme in digital multiplexer system

    的數字復接系統幀同步器設計與實現
  16. Lastly, the selection of stepping motor for digital valve is discussed, and the designation of hardware and software of synchronous controlling system is introduced

    最後，討論了數字同步閥中步進電機的選擇問題，並介紹了同步控制系統的硬體構成和軟體設計。
  17. The developments of this digital synchronous valve and the application to hydraulic synchronous system can be founded on these results. and it is ready for the perfection of the digital valve

    本文的工作為該數字同步閥的研究及其應用打下了一定的基礎，也為后續的數字閥為控制元件的產品完善作了前期準備。
  18. The establishment of synchronous mechanism for the system is simply described, and the realization techniques for the system are studied. some results in this article will be a good choice in some extends for the way to solve the vital technical difficulties of practical chaotic digital communication

    本論文所取得的一些初步成果，在一定程度上解決了混沌數字保密通信實用化的關鍵技術難題，實現了在實際網路環境中混沌同步在數字保密通信中的應用。
  19. Initially, pdh was introduced to improve and replace the obsolete analog frequency division multiplex ( fdm ) system. however, it was soon found that pdh had shortcomings such as difficulty in management, high construction cost, limited applications and lack of connectivity standards at the optical layer. thus, in the early 1990s, synchronous digital hierarchy ( sdh ) was introduced in the transmission system

    Pdh最初引入是為了改進和替代老式的模擬頻分復用器系統，但很快被發現pdh管理困難、造價高、應用范圍窄，且缺乏在光層面上的連接標準，因此90年代初期， sdh （ synchronousdigitalhierarchy ）標準被首先引入了傳輸系統。
  20. The researches of this thesis are carried out around the study and development of adjustable speed digital drive system of permanent magnet synchronous motor ( pmsm ) with wide range of variable speed and high performance, including the analysis of the system structure, the intelligent control method and the design of the system

    本論文的主要工作圍繞研製高性能、寬調速永磁同步電動機的全數字交流控制系統為工程背景展開，對控制系統的體系結構、提高控制系統精度與性能的控制方法、以及軟硬體設計等問題進行了研究。
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