load initial_track s; % y:initial data,s:data with noiseT=0.1; % yp denotes the sample value of PositIOn% yv denotes the sample value of velocity% Y=[yp(n);yv(n)];% error deviation caused by the random acceleration % known dataY=zeros(2,200);Y0=[0;1];Y(:,1)=Y0;A=[1 T 0 1]; B=[1/2*(T)^2 T]';H=[1 0]; C0=[0 0 0 1];C=[C0 zeros(2,2*199)];Q=(0.25)^2; R=(0.25)^2;
上傳時(shí)間： 2014-12-28
上傳用戶：asaqq
為了提高直接轉(zhuǎn)矩控制（DTC）系統(tǒng)定子磁鏈估計(jì)精度，降低電流、電壓測(cè)量的隨機(jī)誤差，提出了一種基于擴(kuò)展卡爾曼濾波（EKF）實(shí)現(xiàn)異步電機(jī)轉(zhuǎn)子位置和速度估計(jì)的方法。擴(kuò)展卡爾曼濾波器是建立在基于旋轉(zhuǎn)坐標(biāo)系下由定子電流、電壓、轉(zhuǎn)子轉(zhuǎn)速和其它電機(jī)參量所構(gòu)成的電機(jī)模型上，將定子電流、定子磁鏈、轉(zhuǎn)速和轉(zhuǎn)子角位置作為狀態(tài)變量，定子電壓為輸入變量，定子電流為輸出變量，通過對(duì)磁鏈和轉(zhuǎn)速的閉環(huán)控制提高定子磁鏈的估計(jì)精度，實(shí)現(xiàn)了異步電機(jī)的無(wú)速度傳感器直接轉(zhuǎn)矩控制策略，仿真結(jié)果驗(yàn)證了該方法的可行性,提高了直接轉(zhuǎn)矩的控制性能。 Abstract: In order to improve the Direct Torque Control（DTC） system of stator flux estimation accuracy and reduce the current， voltage measurement of random error， a novel method to estimate the speed and rotor PositIOn of asynchronous motor based on extended Kalman filter was introduced. EKF was based on d-p axis motor and other motor parameters （state vector: stator current， stator flux linkage， rotor angular speed and PositIOn； input: stator voltage； output: staror current). EKF was designed for stator flux and rotor speed estimation in close-loop control. It can improve the estimated accuracy of stator flux. It is possible to estimate the speed and rotor PositIOn and implement asynchronous motor drives without PositIOn and speed sensors. The simulation results show it is efficient and improves the control performance.
標(biāo)簽： EKF 異步電機(jī) 直接轉(zhuǎn)矩 控制系統(tǒng)
上傳時(shí)間： 2015-01-02
上傳用戶：qingdou
位置敏感探測(cè)器PSD（PositIOn Sensitive Detector PSD）具有位置分辨精度高（可達(dá)1～2 μm）、輸出實(shí)時(shí)性好（響應(yīng)時(shí)間約幾微秒）、系統(tǒng)簡(jiǎn)潔的特點(diǎn)，在位置探測(cè)及相關(guān)領(lǐng)域內(nèi)獲得了廣泛的應(yīng)用；但PSD的輸出信號(hào)小，易受到電路噪聲的影響，若要充分發(fā)揮其性能，則需要高精度、高穩(wěn)定度、低噪聲的測(cè)量電路。針對(duì)PSD這種較高的使用要求，通過對(duì)其等效模型的分析，找到了影響位置分辨精度的主要因素，并提出了一種新形式的測(cè)量電路，減少了測(cè)量電路級(jí)數(shù)，降低了電路的噪聲以及測(cè)量電路內(nèi)部的漂移，同時(shí)具有對(duì)位置測(cè)量非線性的校正功能。采用上述原理以S1880 PSD建立的位置測(cè)量系統(tǒng)的位置分辨達(dá)到2～3 μm。
標(biāo)簽： 敏感探測(cè)器 微位移 測(cè)量 電路設(shè)計(jì)
上傳時(shí)間： 2013-11-06
上傳用戶：skhlm
* This function PositIOns the cursor at the specified * x,y coordinate. It uses the ANSI standard ESCAPE * * sequence to produce the desired effect. Its not the * * fastest way to PositIOn the cursor, but perhaps the * * most portable. *
標(biāo)簽： the coordinate PositIOns specified
上傳時(shí)間： 2015-02-24
上傳用戶：chenjjer
This scheme is initiated by Ziv and Lempel [1]. A slightly modified version is described by Storer and Szymanski [2]. An implementation using a binary tree is proposed by Bell [3]. The algorithm is quite simple: Keep a ring buffer, which initially contains "space" characters only. Read several letters from the file to the buffer. Then search the buffer for the longest string that matches the letters just read, and send its length and PositIOn in the buffer.
標(biāo)簽： initiated described modified slightly
上傳時(shí)間： 2014-01-09
上傳用戶：sk5201314
ENGLISH RESUME Dear sir/madam In answer to your advertisement in present interview for your need. I wish to tender my service. With reference to your advertisement in present interview for your need, I respectfully offer myself for the PositIOn.
標(biāo)簽： your advertisement interview ENGLISH
上傳時(shí)間： 2014-09-08
上傳用戶：chenbhdt
使用pso求最小化一函數(shù) matlab程式碼，寫的非常簡(jiǎn)潔(不到100行)，且還包括了2維的圖形展示，和大家分享參考!!! 一起學(xué)習(xí)matlab和各種optimize methods 最小化：(x-15)^2+(y-20)^2 The swarm matrix is swarm(index, [location, velocity, best PositIOn, best value], [x, y components or the value component]) Author: Wesam ELSHAMY (wesamelshamy@yahoo.com) MSc Student, Electrical Enginering Dept., Faculty of Engineering Cairo University, Egypt
上傳時(shí)間： 2013-12-18
上傳用戶：zhaiye
a program that takes in three arguments: the first one represents the size of an array that will be created the second one represents the maximum value that each of the array elements can have the third one represents the PositIOn in the array that you would like to print the value of.
標(biāo)簽： that represents arguments the
上傳時(shí)間： 2015-07-22
上傳用戶：waitingfy
A fast customizable function for locating and measuring the peaks in noisy time-series signals. Adjustable parameters allow discrimination of "real" signal peaks from noise and background. Determines the PositIOn, height, and width of each peak by least-squares curve-fitting.
標(biāo)簽： customizable time-series measuring function
上傳時(shí)間： 2015-08-10
上傳用戶：invtnewer
Input The input consists of two lines. The first line contains two integers n and k which are the lengths of the array and the sliding window. There are n integers in the second line. Output There are two lines in the output. The first line gives the minimum values in the window at each PositIOn, from left to right, respectively. The second line gives the maximum values. Sample Input 8 3 1 3 -1 -3 5 3 6 7 Sample Output -1 -3 -3 -3 3 3 3 3 5 5 6 7
標(biāo)簽： The two consists contains
上傳時(shí)間： 2014-12-21
上傳用戶：hongmo
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