F - foc 中文

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This paper studies on used the ac servo system based on ti dsp ( lf2407a ) and the foc and digital signal processing thorem , achieves following results : algorithm . we employ svpwm ( space voltage pwm ) algorithm , improve the efficiency of the electric source , and decrease the harmonious elements . we build the mathematic model of the system and simulate it on matlab platform , dsigne segmented pid regulator to adapt variable speed and widen the speed range . measurement . the velocity and electric current measuring , we adopt multi - sampling - rate and digital filter principles . as more improvements we make , the whole system gets a good results . . pc control . the complete controlling system can be controlled remotely . so we develop the pc controlling program . 采用磁場定向脈寬調制算法，提高了電源利用率，降低了逆變電壓的諧波，改善了電機的運行特性，降低了對電網的污染；在matlab平臺上建立了交流永磁同步伺服電機和電壓空間矢量脈寬調制控制系統的數學模型，在仿真的基礎上，對傳統pid調節器進行了改進，提出轉速調節器和電流調節器采用分段pid結構，根據給定轉速所處的區間，自動選擇相應pid調節器的參數，拓寬了調速范圍，提高了控制精度。
Higher - order cumulants are blind to additive gaussian noise ( white or colored ) and this is the theoretical advantage of higher - order cumulants . secondly , the thesis introduces the doa problems and the widely used music method . to overcome the shortcomings of the traditional music method , the thesis proposes the foc - music method , which has better performance than the traditional music method 本文首先介紹了高階統計量的定義和性質,特別指出了高階累積量對加性高斯(白色或有色)噪聲的盲性,這是利用它進行波達方向估計的理論優勢;其次,文中介紹了波達方向( doa )估計問題和doa估計中應用最廣的多信號分類法( music ) 。
The precision and convergence of both rotor speed and flux estimation with ekf largely depend on the accuracy of the models of system noise and measurement noise . a global optimized noise covariance estimation method based on genetic algorithms ( ga ) is applied to ekf in foc system , a ga training simulation system of optimal parameters of ekf is given and the simulation results proves the effectiveness and robust of this algorithms 本文用遺傳算法( ga )對全閉環矢量控制系統中的ekf噪音模型進行離線優化辯識，仿真結果表明， ga尋優到的噪音模型使采用卡爾曼濾波器的無速度傳感器矢量控制系統獲得了與帶速度傳感器矢量控制系統相類似的動態性能，全系統對消息噪音和測量噪音有好的魯棒性。
China , an system - transforming country , in the course of transformation from planned economy system to market economy system , the phenomenon that government broke its promise would emerge inevitably because of inertial system , imperfect legal system and gradually reform model etc . considering the government reputation , the micro - regulation research foc used on natural monopoly will get different conclusion from traditional regulation theory 我國從計劃經濟體制向市場經濟體制轉軌的過程中，由于制度慣性使然、法律制度的不健全、漸進式的改革模式等等原因，人們會經常面對政府失信的現象。政府承諾的不可信，將會扭曲市場主體的經濟行為，導致市場主體行為短期化。
On the basis of analyszing modern ac speed regulation technology , the thesis deduceds in detail the voltage space vector pulse width modulation ( svpwm ) technology and compares to the control characterics betweem direct field oriented control ( foc ) and indirect field oriented control ( ifoc ) for induction motor 本文在分析各種現代交流調速技術的基礎上，詳細推導了對稱的空間矢量脈寬調制( svpwm )技術的基本原理，比較了異步電動機直接磁場定向控制和間接磁場定向控制特點的異同。
Then , the paper discusses the implementation of a new kind of rotor flux and speed observer based on a model reference adaptive system ( mras ) , and a speed sensor - less field - oriented control ( foc ) system using pi controller for induction motor is presented . the math model of the induction motor is nonlinear , time varying and coupled , from the simulation results , we will find the performance of the system using pi controller is not ideal because it is influenced by parameter variations and external disturbance or uncertainty 然而由于感應電機數學模型復雜，具有非線性、時變、耦合等特點，仿真結果表明使用pi速度控制器的系統性能不是很理想，其性能受參數變化、外部擾動及各種不確定性影響嚴重，即使在參數匹配良好的條件下能取得好的性能，一旦系統參數動態變化或受到外部不確定性因素的影響時，系統性能仍將受到影響。
This algorithm integrates the performance of the foc different slices in handling gaussian noise . the weighted hoc slice in this algorithm is updated by united sign iteration algorithm . the performance of this algorithm in suppressing gaussian noise is improved by adjusting the weighting coefficients of the foc slices 該算法的特點是：綜合了四階累積量不同切片抑制高斯噪聲的性能；用符號聯合迭代算法更新加權累積量切片，以減小計算量；通過調整四階累積量切片的加權系數，以獲得抑制高斯色噪聲的最佳效果。
Firstly , according to the detailed analysis on the mathematical model of pmsm , the principle of field oriented control ( foc ) is illustrated . spwm and svpwm are analyzed and contrasted in detail too , and the digital realization techniques based on dsp are given 本文首先在分析永磁同步電機數學模型的基礎上，闡述了永磁同步電機矢量控制基本原理；對正弦波調制技術( spwm )和空間矢量調制技術( svpwm )兩種脈寬調制策略進行了詳細的分析和對比研究，給出了基于dsp的數字化實現方法。
This paper expatiated that the mathematics models of ac motor is higher order , non - linear and closed coupling , multivariable input - output system . and introduces the principle and the algorithm of sine pulse width modulation ( spwm ) , opened - loop space voltage pulse width modulation control ( svpwm ) and field oriented control ( foc ) . finally , realized the control strategies of variable - frequency speed regulating using assembly and c language 文中闡述了交流異步電機的數學模型是高階、非線性、強耦合的多變量輸入輸出系統,介紹了交流電機的正弦脈寬調制、開環電壓空間矢量的u / f控制和磁場定向控制的原理及控制算法,并利用dsp構成控制系統,通過匯編語言和16位定點c語言混合編程的方法實現了上述的變頻調速控制策略。
In order to decrease the computational complexity of higher - order statistics ( hos ) , novel approximate estimation theorems of the foc and the fifth order cumulants are created and proved in theory . the simulation result shows that employing the estimation theorems to optimize the calculation of higher order statistics is an effective method 理論分析與仿真表明：按估計定理對高階統計量的計算進行優化，不僅計算量能大幅度地減小，而且保證了通過估計得到的高階累積量有抑制高斯噪聲的優越性能，這為高階統計量的工程應用創造了一條捷徑。
In engineering , vector control ( vc ) is called as filed orientation control ( foc ) . the principle of foc is to divide stator current into two dc components . one of them is oriented to the rotor magnetic flux , another is oriented to the torque . the operating process can be carried out by transforming coordinate in magnitude flux and torque keeping consistent conditions 矢量控制一般稱為磁場定向控制，該控制理論的原理是在轉子磁通和轉矩保持不變的情況下通過坐標變換將異步電機的定子電流分解為按轉子磁場定向的兩個分量分別進行控制，從而實現轉子磁通和轉矩的解耦。
As for speed - sensorless foc system , the convergence and precision of both rotor speed and flux estimation with ekf depend on the accuracy of the models of system noise and measurement noise , i . e . q and r . genetic algorithm ( ga ) is applied in this paper to optimize parameters of the extended kalman filer ( ekf ) filter in a speed - sonserless field - oriented controller ( foc ) system 卡爾曼濾波估計實現的難點是，電機運行系統噪聲和測量噪聲的模型不易獲得，而卡爾曼濾波器的收斂性和估計的精度在很大程度上受其影響，本文采用遺傳算法對卡爾曼濾波器的輸入參數進行離線優化。
High resolution direction - finding using array signal processing plays an important role in the new electronic reconnaissance satellite system . several algorithms , such as music esprit , wsf , foc - music , are researched in this paper . the analysis of these algorithms principle and the comparison of their performance from the point of view of engineering are given too 采用陣列信號處理進行高分辨率測向是新體制電子偵察衛星最關鍵的一個環節，本文研究了music 、 esprit 、 wsf 、 foc ? music等算法的原理并從工程實用的角度分析比較了它們的性能。
This paper introduces the outline of ac motor drive control and the theories of modern ac motor drive technologies , such as vvvf , dtc and foc . this paper analyses both the disadvantages of a speed control system with speed sensors and the advantages of a speed control system without speed sensors . this paper also presents the current situation of the speed - sensorless technology , especially the applications of this technology in foc systems 本文綜述了交流電機調速的概況，以及變頻調速( vvvf ) 、磁場定向控制( foc ) 、直接扭矩控制( dtc )等現代交流電機調速理論，分析了有速度傳感器交流電機調速系統存在的弊端，以及無速度傳感器調速系統的優越性，并對無速度傳感器交流電機調速技術的現狀進行了分析介紹，特別介紹了該技術在矢量控制系統中的應用。
After studying a lot of documents , we present a speed - estimating method for direct torque control system . this method is based on the theory of dtc , but it takes advantage of the convenient of both the theory of dtc and the theory of foc . we need only to sample the stator ' s current to estimate the speed of the rotor , at the same time the integration of the voltage is avoided 在研究大量文獻的基礎上提出了一種適用于交流電機dtc控制系統的轉速計算方法，該方法以dtc控制為中心，結合dtc和定子磁場定向和轉子磁場定向各自的特點，綜合利用各自的有利之處，只需測量定子電流，避免了對電壓積分，思路清晰，計算簡單。
I could hear people tumbling up from the cabin and the foc s le ; and , slipping in an instant outside my barrel , i dived behind the fore - sail , made a double towards the stern , and came out upon the open deck in time to join hunter and dr livesey in the rush for the weather bow 我能聽見人們跌跌撞撞地從特艙和水手艙里跑出來，于是我立即從蘋果桶里溜了出來，鉆到了前桅帆的下面，又轉身到了船尾，及時地跑到了開闊的甲板上，和亨特利弗西醫生一道沖到了露天的船首。
The subjects of this paper are the realization of speed - sensorless fast point - to - point position orientation system and to analyses the properties of state estimator based on extended kalman filter ( ekf ) for field - oriented controller ( foc ) system of induction motor 本論文的研究目標一是用bang - bang控制思想實現無速度傳感器點對點快速定位系統，二是分析基于擴展的卡爾曼濾波器( ekf )異步電機閉環矢量控制系統狀態估計器的性能。
4 three new fast algorithms of higher order cumulant ( hoc ) based adaptive dynamic spectrum enhancer are presented . based on the advantage of the sign algorithm , a fast algorithm of foc diagonal slice sign iterative adaptive dynamic line enhancer is proposed 4提出了三種自適應動態譜線增強快速算法?利用極性迭代算法可減小計算量的優點，提出了基于四階累積量對角切片極性迭代的自適應動態譜線增強快速算法。
On this basis the control of ac pmsm servo system with three closed loops , current , speed and position , is realized with the theories of foc , svpwm , pi regulation etc , which will be discussed in detail in the paper 在此基礎上,采用矢量定向控制、電壓空間矢量pwm控制、 pi調節等方法實現了具有位置、速度、電流三個回路的交流永磁同步電機伺服系統的控制。文中對這些方法進行了較詳細的論述。

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