指向誤差 的英文怎麼說
中文拼音 [zhǐxiàngwùchā]
指向誤差
英文
directional error-
First, based on phased array antenna ' s mono - pulse goniometry and separate coordinate technology about phase control, the antenna beam pointing error formula, caused by phase quantization error, is derived from linear array and circular array to planar array and cylindrical array
首先以單脈沖相控陣天線測角原理為基本理論出發點，利用相位控制的坐標分離技術，基於線陣、圓形陣等簡單形式的相控陣天線，推導了平面陣、圓柱面陣等相控陣天線由相位量化誤差引起的波束指向誤差公式。This text divides into five chapters altogether : chapter one in the introduction, have introduced the common sensor of displacement, has pointed out the fine characteristic of hall ' s sensor, put forward the basic task ; chapter two have introduced the basic operation principle of hall ' s component ; chapter three introduce hall temperature performance, electromagnetic characteristic, zero error, frequency characteristic and these parameter commonly used compensation method and hall simple application of component ; chapter four having recommended the measurement principle of the feedback servo mechanism, systematic implementation method, the experimental result has appeared, structure the mathematics model, and has analysed the error ; chapter five have pointed out the developing direction in the future while looking forward to
本文共分為五章：第一章緒論中，介紹了常見的位移傳感器，指出了霍爾傳感器的優良特性，提出了基本任務；第二章介紹了霍爾元件的基本工作原理；第三章介紹了霍爾元件的溫度性能、電磁特性、零位誤差、頻率特性以及這些參數常用的補償方法和霍爾元件的簡單應用；第四章介紹了反饋隨動機構的測量原理，系統的實現方法，給出了實驗結果，構建了數學模型，並對誤差進行了分析；第五章展望中指出了今後的發展方向。Its main contributions include the following several aspects : firstly, the dissertation constructs the mathematic model of short baseline orientation determination using two geostationary satellites and analyses the applicable conditions of carrier phase interferometry. orientation determination precision is analysed in depth through both the conventional linearized method and monte - carlo computer simulation method, and the mathematical simulation results show that the linearized method has the shortcoming of fairly low elevation error analysis precision in high latitude area so as not to be very appropriate there. by analyzing the definite factors influencing orientation precision, the dissertation develops the concept of orientation dilution of precision, which uncovers the internal cause of exotic error behavior of bi - satellite orientation, and has important guiding significance for practical engineering applications
本文系統地研究了基於「北斗一號」衛星載波相位干涉測量原理實現地球靜止雙星定向的相關技術，主要研究成果包括以下幾方面:首先，建立了利用兩顆地球靜止軌道衛星進行短基線定向的數學模型，分析了載波相位干涉測量的適用條件;採用傳統的線性化解析法及蒙特卡洛隨機模擬法兩種途徑對雙星定向的精度進行了詳細分析，數學模擬結果表明在高緯度地區線性化解析法由於俯仰角誤差分析精度略有下降而不太適合;在分析定向精度確定性影響因素的基礎上，提出了雙星定向精度衰減因子odop的概念，揭示了雙星定向誤差特殊表現的內部機理，對實際工程應用具有重要的指導意義。3. vecm of result indicate shanghai a index, shenzhen b, hengsheng index, and jiaqua - an index can recur equilibrium when they deparure equilibrium by coefficient of vecm moreover hengsheng index is very quike. by granger test indicate between a and b inde - x have cause and effect contemporary between hengsheng index and jiaquan index hav - e cause and effect, this result is same to vecm
3 、誤差修正模型結果指出上海a股，深圳b股、恆生指數和加權指數在短期偏離均衡時，仍可經由誤差修正項的調整而回到長期均衡關系，並且恆生指數的調整速度是最快的正向調整。In order to make the sensitivity of 2 - demension accelerometer along the two main arbors almost identical, symmetric four - beam structure that embeds a double - sides interdigitated differential capacitive with puckered beam in two directions was used as sensitive component. in addition, the differential capacitive accelerometer fabricated by bulky silicon micromechanical technique has high sensitivity, wide measurement scope, less nonlinear error, and simple converting circuit. then, the structure parameters of the sensitive component were calculated and stimulated, which results in a set of the optimized structure design parameters, main fabrication procedure and several key fabrication technology
為使二維振動傳感器在兩主軸方向的靈敏度大致相同，敏感元件採用高度對稱的四梁結構，其中每個軸向上均採用帶折疊梁的雙側叉指電容結構，採用體硅微機械工藝製作的高深寬比叉指電容式敏感元件，具有高靈敏度、寬量程、非線性誤差小、外圍電路簡單等優點;對設計的敏感元件結構參數進行了計算，並利用有限元法進行了模擬分析，根據模擬結果得出了優化參數;在確定敏感結構的基礎上，研究了敏感元件採用體硅微機械加工工藝製作的工藝流程和關鍵工藝技術;對敏感晶元內部的c - v介面電路進行了原理設計與分析，利用差動測量技術得到由振動引起的微小電容變化量，經c - v介面電路進行相位調制處理，然後通過解調輸出與加速度成正比的電壓信號。The affect of error of antenna pointing in formation satellite insar system to direction picture
系統中天線指向誤差對天線方向圖的影響In many performance check, artillery control systematic dynamic trail aimed error is one of relatively important parameter, dynamic trail aimed error denote : when high cannon system is dynamic trailing, set bullet pellet flight time is 0, in the condition of not considering advance quantity ( 0 fly working ), the axis of artillery pipe should direct goal
在諸多的性能考核中，火控系統的動態跟蹤瞄準誤差是較為重要的參數之一。所謂動態跟蹤瞄準誤差是指：當高炮系統在進行動態跟蹤時，設定彈丸飛行時間為零，即在不帶提前量的條件下（即零飛工作方式下） ，火炮身管的軸線應直接指向目標。The key for phased array antennas with good functions is the use of controllable phase shifters. however, phase quantization errors affect the accuracy of phased array antenna beam pointing badly, which is mainly researched here
其中可控數字移相器的使用，是相控陣天線優越性能實現的關鍵，但由此引入的相位量化誤差，嚴重影響了相控陣天線的波束指向精度。Because the high resolution on high frequency of wavelet package meets the feature of fingerprint containing abundant high frequency, we filtered the fingerprint preliminarily by means of wavelet package. while designing orientation filter, we introduced the square - circle transform to rotate filter, thus we reduced computing complexity and avoided imported errors
具體地，結合指紋圖像中高頻豐富的特點，以及小波包高頻解析度高的分析特性，選用小波包對指紋圖像進行初濾波；在設計方向濾波器時，對濾波器的旋轉引入了方?圓變換的方法，進而減少了計算的復雜度，同時避免引入誤差。In this stitching algorithm, the operator should select two characteristic regions in one of the two pictures that are to be stitched. then the algorithm will search the two best - matching region in the other picture, compute the angle of the rotary between the two pictures, rotate one of the two pictures, then stitching the picture, thereby the rotary error is corrected
這種拼接演算法由用戶在待拼接的一幅照片中指定兩個參照特徵區域，並在另一幅照片中搜索兩處最佳匹配區域，根據這四個區域的位置確定兩幅照片的相對旋轉誤差，然後反向旋轉其中的一幅圖像，再進行對接，從而糾正了兩幅照片的旋轉誤差。The intermittency indices q for orders 2 ~ 5 in hadronic system produced in e + e - collisions at z0 energy are thus measured exactly for the first time. there are different methods in the study of the dynamical fluctuations in high energy e + e ~ collisions
）方向，從而消除了因坐標系的選取引起的系統誤差，首次精確地測量出了z ~ o衰變能量下e ~ + - e ~ -對撞末態強子系統的2 - 5階間歇指數。This thesis analyzed various error resources in gps surveying and advanced appropriate correction measures ; it introduced theory and method that estimate parameter in reliability study, and then, deduced adjustment mathematic model of gps network ; based on analyzing characteristics of reliability study of gps network and outlier analysis, it carried profoundly out study on issue about reliability of gps network, deduced and summarized target of reliability of gps network, including redundant observation component of gps baseline vector and inside & outside reliability index, advanced a theory about reliability of gps network based on correlative analysis, and summarized methods that improve reliability of gps network ; it worked out a software of reliability analysis about gps observation, which made reliability analysis automatic and convenient
論文分析了gps測量中的各種誤差來源，提出了相應的改正措施；介紹了可靠性研究中參數估計的理論和方法，進而推導出gps網平差的數學模型；在分析了gps網可靠性研究和粗差分析特點的基礎上，對gps控制網可靠性問題進行了深入的研究，推導總結出了gps網可靠性指標，包括gps基線向量的多餘觀測分量、內部可靠性和外部可靠性指標，提出了基於相關分析的gps控制網可靠性理論，總結出了提高gps控制網可靠性的措施；編制出了gps觀測數據可靠性分析軟體，使可靠性分析自動方便。Motion errors are given first, and then theoretical analysis, simulation result show affections caused by 3 kinds of typical motion errors both on the doppler and the image. last the phase error criterions are given. 4
4 .研究了機載雙站sar中偏航、俯仰和橫滾三種姿態誤差對回波多普勒頻率和雷達成像的影響，並分析研究了天線指向誤差對回波幅度的影響，最後通過模擬實驗證明了研究的正確性。Anfis - based matching algorithm and compensated recognition algorithm are robust to noise and distortion, and achieve a high accuracy. all of the experiments are tested on standard fp database, and compared accuracy with other related methods. the element and grate of what can result in error is analyzed and compared by experiments
所有的演算法都經過標準指紋庫驗證，並與相應的其他方法在誤差率方面作了比較，分析了導致演算法誤差的因素及程度，結出了實驗結果和對比，分析了演算法的不足之處，並提出了改進方向。The initialization method to achieve different equalizer delay local minimum is proposed for btea and se. comparison study using several uwac with different zero locations is made to demonstrate the equivalent of different initialization method for least mean square ( lms ) algorithm, btea, se and cma
盡管常數模盲均衡演算法的初始化仍然是一個公認的未能解決的問題，但本文通過幾條不同零點位置的水聲通道，對比研究了自適應最小均方誤差演算法、倒三譜演算法、超指數演算法和常數模演算法的不同權向量初始化的等效性。This method, prepared with some single coordinate methods, is effective for both reducing orientation error and wiping out noise, and has better performance for preprocessing of noisy fingerprint images
它包括獲取方向圖、基於方向的濾波、二值化與細化等步驟，有效地減少了計算指紋圖像的方向誤差，去除干擾，得到更清晰準確的處理結果。Robust adaptive beamforming against pointing error
存在指向誤差時的穩健自適應波束形成演算法Influence on performance of interference localization using satellite multiple - beam antenna with pointing error
衛星多波束天線指向誤差對干擾源定位性能的影響Secondly, the performance of the acousto - optic steering system is deteriorated as a result of the coupling because of nonlinear of quadrant detector and the pointing error introduced by satellite platform vibration. for this problem, this paper introduces the model reference adaptive control system, and presents the perfect model. the model reference adaptive controller is designed to force the output of the acousto - optic steering system following the output of the perfect model to improve the system performance
其次，針對聲光偏轉系統由於器件的非線性造成的耦合和平臺振動造成的指向誤差導致系統性能惡化問題，引入了模型參考自適應控制系統，提出了理想的模型，設計了模型參考自適應控制器，強迫性能惡化的聲光偏轉系統的輸出跟隨理想模型的輸出，使其性能改善，利用超穩定性理論確定自適應參數以保證系統的穩定性。Besides, it ’ s also very convenient to add many kinds of phase errors required by the phase error compensation and sar image processing research farther. for imaging algorithms, range - doppler algorithm is extended to broadside stripmap airborne bistatic sar successfully
另外，在我們方法的流程中可以方便地加入載機運動參數誤差、天線波束指向誤差及頻率源的穩定性等各種相位誤差，也為今後進一步研究相位誤差補償及圖像處理等技術打下了良好的基礎。分享友人