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paowuxian
在文本框输入不同的参数，绘制得到相应的抛物曲线。(In the text box to enter different parameters to draw the corresponding parabolic curve.)
- 2010-10-20 19:35:42下载
- 积分：1
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SpeedRegulationSystemResearchofMiningElectricLocom
矿用电机车电控系统有两种,一种是有触点的电控系统,另一种是脉冲调速系统。以晶闸管为主要元件的脉冲调速系统在矿用电机车中仍大量使用。晶闸管属于半控型器件,其控制极只能控制开通而不能控制其关断,在低速运行时,晶闸管一经导通后,如果不能根据需要关断,则电动机承受全部电压而失去控制,电机车全速运行。本文利用MATLAB软件对矿用电机车晶闸管脉冲调速系统的主电路进行建模并仿真,对影响安全运行的关键元器件进行了详细的分析。仿真结果表明晶闸管脉冲调速系统存在安全隐患。随着电子工业的飞速发展,一种新型的全控型电力器件(绝缘门极晶体管IGBT)开始在工业中得到广泛的应用,脉冲调速电控系统如采用全控型电力器件代替半控型元器件(晶闸管),将会大大简化控制电路。由于控制电路简单,便于实现数字化控制。本文对IGBT的调速原理进行分析,采用IGBT和集成PWM脉宽调制器SG3525为主要元件,设计出了双闭环可逆自动调速系统,并对该系统进行实验验证,实验结果表明该系统优于晶闸管直流调速系统,而且运行稳定,可以很方便实现可逆运行。(Mine electric locomotive electronic control system has two types of electronic control system with contacts, and the other is the pulse speed control system. The pulse thyristor as the main component in the mining electric locomotive speed control system is still widely used. A semi-controlled thyristor type devices, the control can only control a very open and can not control the turn-off, in the low speed, the thyristor turn-on once, if not turned off as needed, then the loss of the motor under full voltage control, motor vehicle running at full speed. In this paper, MATLAB software mining electric locomotive speed control system pulse thyristor main circuit modeling and simulation, the key components of the safe operation of a detailed analysis. Simulation results show that the thyristor pulse control system security weaknesses. With the rapid development of the electronics industry, a new full-controlled power devices (Insulated Gate Transistor IGBT) began to be widely used in indu)
- 2010-12-24 13:40:45下载
- 积分：1
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yuyinquzaoxiaobo
基于小波变换的语音信号分解、重构去噪，希望对大家有所帮助。(The voice signal decomposition and reconstruction based on wavelet transform denoising.I hope to be helpful.)
- 2012-05-02 21:26:49下载
- 积分：1
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传输矩阵法计算
用传输矩阵法计算一维光子晶体带隙受角度的影响(useTTM，calculating the effects of incident angle for PBG。)
- 2015-03-17 09:55:39下载
- 积分：1
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MATLAB_Simulink电子信息工程建模与仿真张德丰
说明： 学习使用matlab数学建模，包括了一些基本教程和经典的建模例子。(Learning to use matlab mathematical modeling, including some basic courses and classic modeling examples.)
- 2020-08-01 10:18:37下载
- 积分：1
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eld-traverse
MT-LSCMA智能天线波束形成盲自适应改进算法 不错的源码(MT- LSCMA blind adaptive beamforming smart antenna algorithm source code)
- 2017-05-24 07:34:44下载
- 积分：1
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yourvisittokaakateeyamarriageson2308201235225pm
single phase 11 level inverter
- 2012-08-29 09:48:42下载
- 积分：1
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test-2
iphone开发中的一些基本的东西 包括滚动视图滚动翻页、uitabbar、nav等的应用(iphone development of some basic things, including the scroll view to scroll page, uitabbar, nav and other applications)
- 2011-12-16 19:12:18下载
- 积分：1
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chapter4
说明： 《数字图像处理与机器视觉:Visual C++与Matlab实现》4
特征提取,图像识别初步,人工神经网络,基于ANN的数字字符识别系统(" Digital image processing and machine vision: Visual C++ and Matlab to achieve" four feature extraction, image recognition initially, artificial neural network, ANN based digital character recognition system)
- 2010-04-22 09:10:56下载
- 积分：1
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Burg
自己编写的现代谱估计方法中的Burg算法，并和MATLAB中的函数pburg函数进行对比，两个函数性能相当，便于大家学习掌握这个算法。(Modern spectral estimation methods have written Burg algorithm, and MATLAB functions pburg function comparison, the performance of the two functions is quite near to make you master this algorithm easily.)
- 2021-04-23 17:08:48下载
- 积分：1
