起始方位角 的英文怎麼說

中文拼音 [qǐshǐfāngwèijiǎo]
起始方位角 英文
initial azimuth angle
  • 起 : 起Ⅰ動詞1 （站起; 坐起） rise; get up; stand up 2 （取出; 取走） draw out; remove; extract; pull 3...
  • 始 : Ⅰ名詞1 （最初; 起頭） beginning; start 2 （姓氏） a surname Ⅱ動詞（開始） start; begin Ⅲ副詞[書面...
  • 方 : Ⅰ名詞1 （方形; 方體） square 2 [數學] （乘方） involution; power 3 （方向） direction 4 （方面） ...
  • 位 : Ⅰ名詞1 （所在或所佔的地方） place; location 2 （職位; 地位） position; post; status 3 （特指皇帝...
  • 角 : 角Ⅰ名詞1 （牛、羊、 鹿等頭上長出的堅硬的東西） horn 2 （古時軍中吹的樂器） bugle; horn 3 （形狀像...
  • 起始 : origin; origination; parentage; germ; initiation
  • 方位 : position; bearing; direction; points of the compass; placement
  1. For the bldcm which has a pseudo - sinusoidal back - emf waveform, this dissertation presents a svpwm control method using six discrete position signals for minimizing the torque ripple. the main aspects for the implementation of this method are analyzed, including the initial orientation of the voltage vector, reasonable choice of the impedance angle and the advance commutation angle, and estimation of the successive rotor positions

    針對反電動勢類似正弦的準正弦波反電動勢無刷直流電動機，本文提出一種基於六個離散位置信號的自同步svpwm （電壓空間矢量法）控制方法，用以削弱電磁轉矩脈動，分析了實現這種方法的主要控制環節，包括起動時電壓空間矢量的初始定位，阻抗角與電流超前角的合理選擇以及連續轉子位置的估計等。
  2. Abstract : the attitude error performance of electrostatic gyro should be understood and the relevant error equations must be set up in order to ensure the navigation precision of esgm. the relation between the navigation errors and the attitude errors of gyro was derived by use of spherical triangle. the simulation results show that the temporal performances of the longitudinal and distance errors which come from the initial alignment errors are periodically variational. they also show that the longitudinal and distance errors resulted from gyro drifts are not convergent in time. thus, the effects of initial alignment errors and gyro drifts can not be neglected and must be estimated and compensated

    文摘:為了保證靜電監控器的導航定位精度，需要了解靜電陀螺的姿態誤差特性，建立相應的誤差方程.本文採用球面三角形原理推導了導航定位誤差與陀螺姿態誤差的關系式.模擬結果表明，由初始定向誤差引起的經度誤差和距離誤差的時間特性是周期變化的；由陀螺漂移引起的經度誤差和距離誤差是隨時間發散的.因此，初始定向誤差和陀螺漂移的影響不能忽略，必須對其進行估計和補償
  3. The endpoint is similarly located by measuring clockwise from the starting point by the number of degrees in the sweep angle

    定位終結點的方法與之類似，從起始點順時針測量擺角的度數。
  4. The study shows the characteristics of goodwill are that : ( 1 ) it is the present value of extra - profit of corporation ( 2 ) it is an intangible assets ( 3 ) it is uncertain and risky ( 4 ) the usage is limit and the formation and variance of value is special compared to other assets. as to the recognition and measurement : ( 1 ) we should conceal combined variance item in combined statement when the goodwill is formed in the mode of controlling combination in order to conform to the international principle ( 2 ) the recognition of self - constructed goodwill is necessary ( 3 ) we should make impairment evaluation to revise amortization when we start to amortize after its first recognition ( 4 ) we attach more importance to un - direct measurement approach on present stage ( 5 ) direct measurement approach can be adopted to self - constructed goodwill, while for goodwill - purchased, it may be reference only, we should adopted un - direct approach to recognize. the accounting process of positive and negative goodwill are that the former should conform to the systematic amortization method.,

    2商譽的確認、再確認與計量： u ）對我國而言，以控股合併方式下形成的外購商譽在合併報表中的處理應遵循國際慣例，取消合併價差項目； （ 2 ）從資產的確認標準以及會計原則等多個角度來看，確認自創商譽非常必要； （ ）商譽在初始確認后，應對購買商譽進行攤銷的同時，並進行商譽的減損評價，使減損評價起到「修正」攤銷的作用： （ 4 ）直接計量法與間接計量法是計量商譽的兩種方法，現階段只能是計量的科學性讓位於計量的難易程度，採用間接法計量商譽； （ 5 ）隨著近年來自創商譽入賬的呼聲日益高漲，若要將自創商譽入賬，顯然只能採用直接計量法計量其價值，而對外購商譽，可以先以直接計量法的計算結果作為重要參考，然後再用間接計量法計算的結果對商譽登記入賬。
  5. Enquiries revealed that the company, situated at 701 nathan road in mong kok, had been operating since february 2003 and had placed advertisements on newspapers to recruit office assistants

    警方調查顯示，該涉案公司位於旺角彌敦道七百零一號，自二三年二月起開始運作，並在報章刊登廣告聘請辦公室助理。
  6. The principal initial hole factors influencing primary section trajectory, such as sidetracking position ( formation factors ), primary deviating angle and primary azimuth of the sidetracking position are analysed by spatial plane - tilted method

    文章運用空間斜平面法分析了對側?水平井起始段有重要影響的主要初始井眼條件，包括側?點（地層因素） 、側?點初始井斜角、側?點初始方位角等對起始段軌跡的影響。
  7. Firstly, this paper introduces the asynchronous motor model, and compares it with the dc motor ’ s. then the paper studies the principle of vector control, and proposes an improved current model of rotor flux observer. this paper also studies the three - level inverter ’ s topology, working principle, the neutral - potential unbalance mechanism and its controlling strategy. the paper especially studies the svpwm in details. the interface between the vector control and the three - level inverter is studied in details, including the generation of reference voltage vector, its judging of the sector and triangular regions, and the working mechanism after it sent into three - level inverter. when synthesizing the reference voltage vector, select the vector which only includes p and o states as the starting vector, thus eliminate the vector shift problem when sector changes. this paper fully takes advantages of the powerful functions of matlab / simulink to set up the simulation model. this construction is very explicit. the simulation results verify the inverter voltage output is correct, the rotor flux is steady, the asynchronous motor ’ s dynamic and steady state performances and speed modulation are excellent

    本文首先介紹了異步電機的數學模型，在此基礎上將異步電機的數學模型與直流電機的數學模型進行了比較;然後介紹了矢量控制的基本原理，採用了一種改進的轉子磁鏈電流型觀測模型;對三電平逆變器的電路拓撲、工作原理、中點電位不平衡的機理及控制方法進行了介紹，詳細分析了空間矢量脈寬調制策略。本文對異步電機的矢量控制與三電平逆變器之間的介面進行了詳細的研究，包括:參考電壓矢量的形成、所落扇區與具體小三角形區域的判斷、送入逆變器之後的工作機理。在參考電壓矢量的合成時，選擇只包含p 、 o狀態的空間電壓矢量作為起始矢量，解決了扇區切換時的矢量突變問題。
  8. Because the ins error equation is unstable, some initial states error will cause error floating and error accumulating, if the filter observations were only position error, kalman filter will converge very slowly, and some states error ( such as yaw error ) will be great. since the milemeter altimeter and piloting could only output position information, this paper put forward a method, firstly estimateing states and then kalman filtering, to improve filtering effect. simulation proved that this method could effectively reduce the system states error, quicken filtering convergence and improve filtering precision

    由於慣導系統（ lsins ）的誤差方程是發散的，某些初始狀態的誤差會引起誤差的漂移和積累，當觀測量只有位置誤差時，卡爾曼濾波的收斂速度很慢，某些狀態（如方位角）誤差很大，而以上除慣導外的其它導航傳感器直接提供的只是位置信息，為了改善濾波器性能，本文根據里程計等傳感器的特點，提出了首先對狀態做出估計，然後在狀態估計的基礎上，進行卡爾曼濾波的方法。
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