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;
為了提高直接轉矩控制（DTC）系統定子磁鏈估計精度，降低電流、電壓測量的隨機誤差，提出了一種基于擴展卡爾曼濾波（EKF）實現異步電機轉子位置和速度估計的方法。擴展卡爾曼濾波器是建立在基于旋轉坐標系下由定子電流、電壓、轉子轉速和其它電機參量所構成的電機模型上，將定子電流、定子磁鏈、轉速和轉子角位置作為狀態變量，定子電壓為輸入變量，定子電流為輸出變量，通過對磁鏈和轉速的閉環控制提高定子磁鏈的估計精度，實現了異步電機的無速度傳感器直接轉矩控制策略，仿真結果驗證了該方法的可行性,提高了直接轉矩的控制性能。
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.
* 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. *
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.
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.
使用pso求最小化一函數
matlab程式碼，寫的非常簡潔(不到100行)，且還包括了2維的圖形展示，和大家分享參考!!!
一起學習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
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.
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.
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
