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mrife
M-rife估频算法的实现,Matlab函数。(M-rife frequency estimation algorithm, Matlab function.)
- 2021-01-06 23:08:53下载
- 积分:1
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MATLAB
一、 牛顿-拉夫逊法概要
首先对一般的牛顿-拉夫逊法作一简单说明。已知一个变量X的函数
(4-6)
解此方程式时,由适当的近似值X(0)出发,根据 (4-7)
反复进行计算,当X(n)满足适当的收敛判定条件时就是(4-6)式的根。这样的方法就是所谓的牛顿-拉夫逊法。
式(4-7)就是取第n次近似解X(n)在曲线 上的点 处的切线与X轴的交点作下一次X(n+1)值的方法。参考图4-2(a)。在这一方法中为了能收敛于真解,初值X(0)的选取及函数f(X)必须满足适当的条件,如图4-2(b)所示的那种情况就不能收敛或收敛到别的根上去。
这一方法还可以做下面的解释,设第n次迭代得到的解与真值之差,即 的误差为 时,则
(4-8)
把 在 附近对 用泰勒级数展开
(4-9)
上式略去 以下的项
(4-10)
的误差可近似由上式计算出来
图4-2
(4-11)
比较式(4-7)和(4-11),可以看出牛顿-拉夫逊法的修正量和 的误差的一次项相等。
用同样的方法考虑,给出对n个变量 (:Because of the importance and complexity of power system, better algorithm and programme language
is very important . An interior point method based on the perturbed Karush2Kuhn2Tucker (KKT) condition is pre2
sented in this paper , where the method and process for the optimal power flow is treated through the Matlab’s
symbolic math toolbox and Mfunction is also presented. Using the symbolic code , it can improve the adaptability
of the programme dramatically. The advantage is that , what we need to do is change the model expression. We
can make use of the symbolic programme to check our programme while we write the Mfunctions. Using the Mat2
lab , we find the optimal solutions and calculate quickly and efficiently. It has proposed the powerful and unique
functions of Matlab in the optimization and calculation for power system.
Key words :power system symbolic calculation optimal power flow interior point method)
- 2020-07-08 16:38:56下载
- 积分:1
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spacecraft-code
一个航天器的动力学响应程序,采用模态价值分析准则和内平衡法则进行模型降阶。(Dynamic response of a spacecraft program, the use of value analysis mode within the balance guidelines and rules for model reduction.)
- 2011-11-10 22:39:36下载
- 积分:1
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example_SiSo
这是一个单输入单输出模型系统进行模型预测控制编程的例子(single input single output system with mpc)
- 2018-05-30 08:18:43下载
- 积分:1
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RBFPID
在simulink平台上的基于RBF神经网络的PID算法,适用于simulink仿真中系统的实时自适应控制(PID algorithm based on RBF neural network on Simulink platform is suitable for real-time adaptive control of system in Simulink simulation)
- 2018-08-29 15:33:17下载
- 积分:1
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askd
amplitude shift keying
- 2009-12-01 17:05:56下载
- 积分:1
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IIR
无限脉冲响应数字滤波器IIR算法c语言.c文件(Infinite impulse response IIR digital filter algorithm c language)
- 2014-12-22 16:59:52下载
- 积分:1
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DIPimage-2.5.1
数字图像处理工具箱,能显示一维二维甚至三维图像,弥补了matlab的不足,对于处理多维的多光谱和高光谱有很大优势
(DIPimage is a MATLAB toolbox for scientific image processing and analysis)
- 2013-11-26 21:26:43下载
- 积分:1
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CV_CT_STF
用matlab 编写的 ,目标做匀速和匀加速运动,使用强跟踪对其进行滤波(Prepared using matlab, goals do uniform and uniformly accelerated motion, the use of strong tracking filter them)
- 2013-07-04 10:12:48下载
- 积分:1
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GUI
An example of an interactive GUI in matlab
- 2010-06-05 21:40:00下载
- 积分:1