frequency moment 中文意思是什麼
frequency moment
解釋
頻數距-
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。 -
The theory of complex - moment - coefficient method is provided due to ssr, and the relationship between complex - moment - coefficient d ( m ) and subsynchronous frequency is also illustrated
在ssr研究中，主要闡釋了復數力矩系數法研究的機理，探討了復力矩系數d ~ （ （ m ） ）與次同步頻率的關系。 -
Aiming at five kinds of targets from geneva lake which are rock, sand, pebble, grit and sullage, the features we extracted based on the cwt time - frequency matrix are singular values, some parameters of histogram and invariant moment
針對萊蒙湖底的巖石、沙、卵石、砂礫、淤泥等五類目標，文中所提取的特徵主要有時頻矩陣的奇異值、直方圖的有關參數以及不變矩等三類特徵。 -
Through analyzing and researching the problem of variable frequency to working frequency of high - power electromotor in theory, the key of conversion is pointed out in the paper. on the basis of analyzing equivalent circuit diagram and vector - diagram of induction - motor, the phase of working frequency power whether or not consistent with the output phase of variable frequency power at the moment of conversion is the key to decide whether the conversion is successfully
本論文針對大功率電機變頻轉工頻轉換存在的問題在理論上作深入細致的研究，根據感應電動機的等效電路和相量圖分析，指出大功率電機變頻轉工頻能否成功，關鍵在於變頻轉工頻瞬時，工頻電源和變頻輸出電源是否相位一致。 -
Compared with non - slung - load flight, additional aerodynamic load, gravity load should be considered in the slung - load system. so the moment to the gravity center, flight mode and the natural frequency will change
直升機吊掛飛行，與直升機非吊掛飛行狀態相比，增加了新的氣動載荷、重力載荷，和因此產生的對直升機重心的力矩，其飛行運動模式、低頻振蕩固有頻率均發生改變。 -
Mean arterial pressure ( map ), pulse pressure, heart rate ( hr ), respiratory pressure and frequency of respiration at different moment were recorded for analysis
記錄不同時點的平均動脈壓（ map ） 、脈壓、心率、呼吸壓、呼吸頻率，綜合分析，研究耳針的調整效應及作用機制。 -
The result shows, the source parameters for example seismic moment, corner frequency and stress drop and so on is relative with magnitude, the evolvement characteristic of time and space of stress drop is a new measure for earthquake prediciton
分析表明，該地區的地震矩、拐角頻率與應力降等震源參數與震級有一定的相關性，應力降的時空演化特徵可以作為該地區今後地震趨勢預測的一種新手段。 -
Utilizing the dynamics simulative software adams to carry out computations on the dynamic response, driving moment and natural frequency of the robot, in view of the above the optimization was carried out on the structural parameters of the robot
利用動力學模擬軟體adams對機器人的動態響應、驅動力矩和固有頻率進行了計算，據此對機器人的結構參數進行了優化。 -
Through establishing three mathematics models including the movement equation of the mechanical and electrical transmission system, the control of the load and the sliding in stable status, direct - current - brake of ac motor, this paper ascertained the range of the frequency value of drive motor and the efficiency of transmission system, calculated the efficiency of load motor in stable status and the moment of load motor in braking. this paper completed the design of the mechanical part of inertia brake test platform and provides a tool for the measurement of the inertia brake parameters
本文還通過建立慣性制動器試驗臺的包括機電傳動系統的運動方程、穩態運行時負載與轉差率控制、交流電動機直流制動在內的三個數學模型，確定驅動電機的頻率取值范圍和傳動系統的傳動效率，驗算慣性制動器穩態運行時負載電機軸功率和慣性制動器制動時負載電機軸力矩，完成慣性制動器試驗臺設計中的機械部分，為慣性制動器各參數的測量提供工具。 -
Through studying on the economic forecast and uncertain factor, combining with the data at the moment and the circumstances in the future, the type, repairing frequency and repairing grade of the naval vessels that will be repaired in the dock are forecasted
第二章是進出船塢維修艦船的預測，結合項目經濟評價中預測和不確定因素的研究，分析現有數據和未來情況，預測出維修艦船的船型、維修頻密度和維修等級。 -
As the motor of hev, it is required to meet the need of the frequency of start - up / shut - down, step - up / speed - down, the radical change between higher angular moment during low speed or climbing and lower angular moment during high speed, the enablement of regenerative braking
作為混合動力電動汽車用的電機要求能夠滿足頻繁地啟動停車、加速減速，低速或爬坡時要求高轉矩，高速行駛時要求低轉矩的大范圍變速，以及實現再生制動的需要。 -
But using the high - frequency approximate method to deal with the coupling of parts of electrical - large size target is troublesome as well as not accurate. combining the moment method and the high - frequency approximate method is a development trend and study way in the future
但高頻近似方法對于電尺寸大而形狀很復雜的散射體各部件之間的相對禍合處理起來有些麻煩且不很精確。將高頻近似方法和數值方法（如矩量法）相結合，是以後的發展趨勢和研究方向。 -
To indicate the effect of gyro moment on the mount system, including frequency domain response and time domain response, the new system was analyzed
對新的動力總成懸置系統動力學模型進行計算分析，研究了陀螺矩陣對頻域、時域響應的影響。 -
Numerical simulations for different grain models show that the high frequency longitudinal acoustic oscillations could he generated at the moment of pressure filling
摘要固體火箭發動機中聲波振蕩是引起不穩定燃燒的一個重要原因。 -
At the aspect of motor control arithmetic design, it adopts the technology of frequency rising and falling control to control stepmotor according to the stepmotor ’ s characteristic of the moment and frequency ; it adopts double loop pid control arithmetic to control ac and dc servomotor according to the characteristic of ac and dc servomotor
控制演算法方面，針對步進電機獨特的矩頻特性，選用了升降頻技術進行控制;針對交直流伺服電機的特性，選用了雙閉環pid控制演算法進行控制，均得到了較好的控制效果。 -
1. adopt the best manner of speed moment, and frequency converter timingfor automatic adjustment, is has the functions including 2. start cushion, stop working, locking and metering, etc. 2. adopt full automatic tension controller and powder magnetic brake for unwinding which can keep tension of unwinding invariable
1本機控制系統採用「速度力矩」的最佳方式，由變頻控制系統統一自動調整，並具有啟動緩沖停車防松計米定長等功能。 -
Through the test of the separating sieve ' s and beams vibration acceleration, the dynamic bending moment, torque and shearing force as well as the analyze of each parameter by dividing rotation speed range from 300 r / min to 600 r / min of the main shaft, the change regularity of the vibration of the separating sieve, the vibration and the dynamic load on dangerous cross section with the change of rotation speed of the main shaft is obtained. research shows that there exits apparent relevance between the vibration as well as the dynamic load of the main beam and the vibration of the separating sieve. the vibration of the separating sieve mainly affects the composition of low frequency of the vibratio n of the main beam, appropriately amending the vibration acceleration of the separating sieve, the loading and vibration of the mam beam can be directly improved
通過分檔測試主軸轉速在300 600r min范圍內分離篩與梁的振動加速度、梁所承受的動態彎矩、扭矩和剪力以及各參量的時頻域分析，得到了主軸轉速與分離篩振動、主梁的振動及其危險截面的動態載荷間的變化規律，研究表明梁的振動和其所承受的動載與分離篩的振動之間具有明顯的相關性，分離篩的振動主要影響梁振動的低頻成分，適度改善分離篩的振動加速度，可直接改善梁的負載和振動特性。 -
Firstly, based on the geometric relationship of sar system, the low frequency, uwb and wide - angle electromagnetic scattering models of calibrators are achieved, using the moment method and the asymptotic waveform evaluation technique
首先採用矩量法和漸近波形估計技術，結合sar幾何關系，獲得定標體的低頻，超寬帶和寬角度電磁散射模型。 -
By digital weighted filtering, the analysis of fringe frequency is converted into the analysis of fringe modulation. and based on the correlation between local spatial frequency and the reliability of phase data, the correlation between modulation after digital weighted filtering and the reliability can be set up. thus modulation ordering at this moment is equal to reliability ordering, resulting in an optimized path
數字加權濾波之後的調制度函數攜帶了條紋頻率的信息，因此數字加權濾波將對于條紋頻率的分析轉化為對于調制度的分析，且根據偏離條紋基頻的程度與位相可靠度之間的對應關系，可建立經過數字加權濾波之後的調制度函數與位相可靠度之間的關系。 -
In frequency domain, the direct problem - electromagnetic scattering problem is solved by the method of moment, and the inverse problem by rga
在頻域方式下，正問題用矩量法求解，逆問題採用實數遺傳演算法，得到頻域方式下基於實數遺傳演算法的微波成像技術。
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