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Description: ： 文章根据永磁同步电机的数学模型和直接转矩控制的基本原理， 设计了一种基于T MS 3 2 0 F 2 8 1 2的
全数字化直接转矩控制系统。首先利用MA T L A B软件对直接转矩控制系统进行建模和仿真， 得到电流、
转速、 转矩以及磁链的仿真波形， 然后对 系统进行实验研究。-t：Ac c o r d i ng t o t h e ma t h e ma t i c a l mo d e l o f Pe r ma ne n t M a g n e t S y nc h r o no u s M o t o r a n d pr i nc i pl e o f
Di r e c t To r q ue Co n t r o l S y s t e m．a Di g i t a l DTC c o n t r o l s ys t e m b a s e d o n DS P TM s 3 2 0F 28 1 2 i s pr o po s e d i n
t hi s pa pe r ，Fi rs t l y，t h e mod e l i ng a n d s i mu l a t i o n o f t h e c o n t r o l s ys t e m a r e i nt r o d u c e d b a se d o n M ATL AB／
S I M ULI NK．I t i s s h o we d t h a t t he s ys t e m Wa s de s i g n e d r i g h t l y．Th e n t h e c o n t r o l s ys t e m C a n b e e x pe r i me n t e d ．
Ke y wo r d s：d i re c t t o r q ue c o n t r o l ；pe r ma n e n t ma g n e t s yn c h ro n o u s mo t o r ； DS P
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Size: 189440 |
Author: 张国辉 |
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Description: 一．会员中心全新编写，采用Ajax技术，速度比旧版有所提升，功能和互动也比旧版好了，在这里我就不一一介绍了，自己去发掘吧！
二．播放页上一首和下一首标签更改
{$上一首舞曲名称}
{$上一首舞曲链接}
{$下一首舞曲名称}
{$下一首舞曲链接}
例子:
<a href="{$上一首舞曲链接}" title="{$上一首舞曲名称}">上一首</a>
<a href="{$下一首舞曲链接}" title="{$下一首舞曲名称}">下一首</a>
<a href="{$上一首舞曲链接}" title="{$上一首舞曲名称}">{$上一首舞曲名称}</a>
<a href="{$下一首舞曲链接}" title="{$下一首舞曲名称}">{$下一首舞曲名称}</a>
三．应各大用户要求增加会员呢称功能。
四．收藏地址改为 user/do.asp?ac=fav&id= 大家注意改链接。-1. New Member Centre prepared, using Ajax technology has improved faster than previous versions, features, and interactive than the old well, I will not go into details here, and their own to explore it!
2. Play page and the next one to change first tag
($ Name) on a dance
($ Link) on a dance
(Name) $ to the next dance
(Link) $ to the next dance
Examples:
<a href="{$上一首舞曲链接}" title="{$上一首舞曲名称}"> last one </ a>
<a href="{$下一首舞曲链接}" title="{$下一首舞曲名称}"> next song </ a>
<a href="{$上一首舞曲链接}" title="{$上一首舞曲名称}"> ($ on a dance name) </ a>
<a href="{$下一首舞曲链接}" title="{$下一首舞曲名称}"> first dance name ($ next) </ a>
3. Request for additional members to be the major user nickname function.
4. Add address to user/do.asp? Ac = fav & id = attention to change the link.
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Size: 5836800 |
Author: 小利 |
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Description: msp430 实验代码 1,MSP430开发基础
2，键盘设计
3，数码管显示电路设计
4，液晶模块接口
5，MSP430 CRC
6，中文输入法
7，数据压缩算法
8，FIR滤波
9，FFT算法
10，波特率自动识别
11,串行存储
12；NAND flash 接口
13；A/ D，TLV2541
14；DA DAC8830
15；ADS1241
16；温度 TMP100
17；定时器 DAC
18；数据采集
19；交流电压测量
20；车速测量
21；DS1820
22；DS1302
23；基于BQ26500温度检测系统
24；红外传输系统
25；pc通信
26；无线MODEM
27；楼宇对讲系统
28；DSP HPI接口
29；无线传输模块
30；步进电机控制
31；can通信系统-msp430 test code 1, MSP430 Development Foundation 2, keyboard 3, the digital display circuit 4, the LCD module interface 5, MSP430 CRC 6, 7, Chinese input methods, data compression algorithm 8, FIR filter 9, FFT algorithm for 10, Porter automatic identification rate of 11, serial memory 12 NAND flash interface, 13 A/D, TLV2541 14 DA DAC8830 15 ADS1241 16 temperature TMP100 17 timer DAC 18 data collection 19 AC voltage measurement 20 speed measurement 21 DS1820 22 DS1302 23 temperature detection system based on BQ26500 24 infrared transmission system 25 pc communication 26 wireless MODEM 27 building intercom system 28 DSP HPI interface, 29 wireless transmission module 30 stepper motor control 31 can Communication Systems
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Size: 247808 |
Author: teamo38 |
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Description: 三相整流和单项逆变，该模型能够完成三相交流对单相交流的转换-3 AC-DC-1 AC
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Size: 18432 |
Author: qiu |
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Description: 数字水印Linux系统下的实现
Peter Meerwald
Dept. of Scientific Computing, University of Salzburg-Watermarking source
version 0.4
* bug fixes
- wm_xia_{e|d}.c variable level uninitialized
- wm_zhu_{e|d}.c variable level uninitialized
- issue with random() vs. rand() and RAND_MAX in frid2_common.c
* added option to bruyn algorithm to disable block skipping
* added algorithm kim
version 0.3
* added nice manual/documentation
* added algorithms by Dugad, Wang, Zhu, Fridrich
* added Makefiles for Win32 plattform (mingw32)
version 0.2
* added contribution by Vassilis Fotopoulos (Piva s algorithm,
DCT, Hartley and subband domain)- see Fotopoulos/ subdirectory
* stuff moved to Meerwald/ subdirectory
* added Bruyndonckx, Corvi, Koch, Xia, Xie algorithms
version 0.1
* initial release
Peter Meerwald
Dept. of Scientific Computing, University of Salzburg
pmeerw@cosy.sbg.ac.at
http://www.cosy.sbg.ac.at/~pmeerw/Watermarking
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Size: 548864 |
Author: lunch |
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Description: A 3-Phase ac Induction Motor Control System
Based on the MC68HC908MR32
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Size: 189440 |
Author: adrian |
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Description: system has been virtually created in order to actualize the conversion from DC to AC.
The basic components of this are a stabilizer a 6 IGBTs 3 arm bridge, and a Filter LC
and a 10KW load. At third, the control circuit, is discussed and has been designed in
Simulink, results to sinusoidal characteristics which are a priory defined. The main
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Size: 498688 |
Author: mimo |
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Description: 一种基于 US B 2 ． 0接 口的 3 2路高速数据采集系统设计 -A Des i g n o f 3 2 Pa t h wa y F a s t Da t a Ac q ui s i t i o n Sy s t e m
Ba s e d o n USB 2． 0 I n t er f a c e
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Size: 192512 |
Author: happsky |
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Description: C8051F93X 开发工具用户指南
1. C8051F93X 目标板
2. 串行适配器（USB至目标系统协议转换器）
3. Silabs IDE与产品信息CD-ROM CD 内容包括:
Silabs 集成开发环境IDE
安装IDE 实用程序SETUP.EXE
源代码实例与寄存器定义文件(头文件)
文档资料
4. AC/DC 电源适配器
5. USB串行电缆
6. 10 芯扁平电缆
7. 快速起动指南
8. C8051F93X 开发工具用户指南此文档-C8051F93X Development Tools User Guide
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Size: 900096 |
Author: deng |
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Description: 交流电机的驱动。MC-PWM的应用。
MCPWM 含有 3 个独立的通道，每个通道包括：
1 个32 位定时器/计数器（TC）；
1 个32 位界限寄存器（LIM）；
1 个32 匹配寄存器（MAT）；
1 个10 位死区时间寄存器（DT）和相应的 10 位死区时间计数器；
1 个32 位捕获寄存器；
2 个极性相反的已调整的输出（MCOA 和 MCOB）；
1 个周期中断、1 个脉宽中断和 1 个捕获中断。 -AC motor drive. MC-PWM applications. MCPWM contains three separate channels, each channel includes: 1 32 bit timer/counter (TC) 1 32-bit limit register (LIM) 1 32-match register (MAT) 1个10 dead time register (DT) and the corresponding 10-bit dead time counter 1 32-bit capture register 2个opposite polarity adjusted output (MCOA and MCOB) 1 cycle interrupt a pulse-width capture interrupts and an interrupt.
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Description: Clustering Evaluation: Evaluate the clustering result by accuracy and normalized mutual information
Deng Cai, Xiaofei He, and Jiawei Han, "Document Clustering Using Locality Preserving Indexing", in IEEE TKDE, 2005. Bibtex source
bestMap
hungarian
MutualInfo
===========================================
fea = rand(50,70)
gnd = [ones(10,1) ones(15,1)*2 ones(10,1)*3 ones(15,1)*4]
res = kmeans(fea,4)
res = bestMap(gnd,res)
============= evaluate AC: accuracy ==============
AC = length(find(gnd == res))/length(gnd)
============= evaluate MIhat: nomalized mutual information =================
MIhat = MutualInfo(gnd,res)
-Clustering Evaluation: Evaluate the clustering result by accuracy and normalized mutual information
Deng Cai, Xiaofei He, and Jiawei Han, "Document Clustering Using Locality Preserving Indexing", in IEEE TKDE, 2005. Bibtex source
bestMap
hungarian
MutualInfo
===========================================
fea = rand(50,70)
gnd = [ones(10,1) ones(15,1)*2 ones(10,1)*3 ones(15,1)*4]
res = kmeans(fea,4)
res = bestMap(gnd,res)
============= evaluate AC: accuracy ==============
AC = length(find(gnd == res))/length(gnd)
============= evaluate MIhat: nomalized mutual information =================
MIhat = MutualInfo(gnd,res)
===========================================
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Size: 5120 |
Author: wzy |
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Description: noip 2009 最优贸易AC代码
两次dfs,分别判断是否与起点、终点相连，并更新可行解的最大值-noip 2009 Problem 3
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Size: 1024 |
Author: Sunshone |
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Description: 使用 SN8P1702A 的低成本上下限通用数字表头
图示电路是一款输入电压 DC200mV ,满度读数 2000 个字的数字电压表头电路.分辨力达到 100uV/字 .这种参数与通常使用的 3 位半数字表头相吻合,(但是这里没有负电压信号的测量功能).因此,可以方便地在无需负信号输入的场合替换原来的数字表头.
替换带来的好处是这里具有上下限设置的控制功能,而普通的 3 位半数字表头却只能测量显示而不能进行设置控制.
配原理图应用和连接说明:
图A:测量和控制直流 200mA 信号.如果是交流信号,需要先有 AC-DC 转换.
图B:测量和控制直流 200mV 信号.如果是交流信号,需要先有 AC-DC 转换
图C:测量和控制直流 4～20mA 信号.这种信号可以远传,例如压力传感器的输出.输入配置的 -50mV 电压是在输入 4mA 的时候,恰好抵消取样电阻上的压降而设.实际中需要使用低内阻的恒压源.
图D:测量和控制温度测量信号.LM35D 具有 10mV/℃ 的输出,因此,通过 10:1 的分压,达到 1mV/℃,100℃ 就是 100mV,100mV 就显示 1000 个字,把小数点定位在十位上,就是 100.0℃
附有 AD 转换部分的源程序-Use SN8P1702A low-cost universal digital meter on the lower
Icon is a circuit input voltage DC200mV, full-scale reading of 2000 characters digital voltage meter circuit. Resolution to 100uV/word. This argument often used three and a half number of the header match, (but there is no negative voltage signal measurement function). Thus, it can easily without a negative signal input the number of occasions replace the original header.
The benefits are here to replace a set of control functions on the lower limit, while the ordinary three half-meter can only measure the number of display and control can not be set.
Schematic connection with the application and instructions:
Figure A: 200mA DC measurement and control signals. If the AC signal, you need to have AC-DC conversion.
Figure B: 200mV dc measurement and control signals. If the AC signal, you need to have AC-DC converter
Figure C: measurement and control of DC 4 ~ 20mA signal. This signal can be remote, such as pressure s
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Size: 163840 |
Author: 蓝天 |
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Description: 该数字电压表具有手动和自动测量功能，设计者完成相应的硬件和软件设计。实现技术指标包括：
1可测量工频交流电压
2电压测量精度达5/1000
3电压测量分5档：2.5V、10V、20V、100V、700V
4输入阻抗大于1MΩ。
5显示器可显示测量的有效值。
6有手动和自动按键，自动档量程自动切换
7写出程序流程图及汇编程序。-The digital voltage meter with manual and automatic measurement functions, the designer to complete the appropriate hardware and software design. Achieve technical indicators including: 1 2 measurable voltage frequency AC voltage measurement accuracy of 5/10 003 voltage measurements in 5 files: 2.5V, 10V, 20V, 100V, 700V 4 input impedance greater than 1MΩ. 5 display shows the measured RMS. 6 with manual and automatic button, automatic transmission automatic range switch 7 process flow diagram and assembler to write.
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Size: 174080 |
Author: 庆庆 |
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Description: 电路分析与应用：单元0 安全用电与静电防护.ppt单元1 测量分析电阻电路.ppt单元2 测量分析等效变换电阻电路1.ppt单元3 测量分析线性电路.ppt单元4 测量分析动态电路.ppt单元5 测量分析正弦交流电路.ppt单元6 测量分析互感电路.ppt单元7 测量分析非正弦周期信号.ppt-Circuit Analysis and Applications: Unit 0 safe use of electricity and static electricity protection. Ppt resistance circuit measurement and analysis unit 1. Ppt Measurement and Analysis Unit 2 Equivalent Transformation Circuits 1.ppt linear circuit measurement and analysis unit 3. Ppt Unit 4 Measurement and Analysis of Dynamic Circuits . ppt Unit 5 Measurement and Analysis of sinusoidal AC circuits. ppt mutual inductance circuit measurement and analysis unit 6. ppt Measurement and Analysis Unit 7, non-sinusoidal periodic signals. ppt
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Size: 9487360 |
Author: 小李 |
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Description: 无刷电机驱动程序，在CCstudio v3.3下运行顺畅，直接可用，含LCD显示程序。-AC motor driver, to run smoothly in the CCstudio v3.3 directly available, including LCD display program.
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Size: 212992 |
Author: jinguoju |
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Description: Main Features
• Quad ADC with 8-bit Resolution
– 1.25 Gsps Sampling Rate in Four-channel Mode
– 2.5 Gsps Sampling Rate in Two-channel Mode
– 5 Gsps Sampling Rate in One-channel Mode
– Built-in four-by-four Crosspoint Switch
• 2.5 GHz Differential Symmetrical Input Clock Required
• ADC Master Reset (LVDS)
• Double Data Rate Output Protocol
• LVDS Output Format
• Digital Interface (SPI) with Reset Signal
– Selectable 1:1 or 1:2 Demultiplexed Outputs
– Channel Mode Selection
– 500 mVpp or 625 mVpp Analog Input (Differential AC or DC
Coupled)
– Selectable Bandwidth (Four Available Settings)
– Gain Control (±18 )
– Offset Control (±50 mV)
– Phase Control (±14 ps Range)
– Standby Mode (Full or Partial)
– Binary or Gray Coding Selection
– Test Mode
• Power Supplies: 3.3V and 1.8V (Outputs), 1.8V (Digital)
• Power Dissipation: 4.2W Total (1:1 DMUX Mode)-Main Features
• Quad ADC with 8-bit Resolution
– 1.25 Gsps Sampling Rate in Four-channel Mode
– 2.5 Gsps Sampling Rate in Two-channel Mode
– 5 Gsps Sampling Rate in One-channel Mode
– Built-in four-by-four Crosspoint Switch
• 2.5 GHz Differential Symmetrical Input Clock Required
• ADC Master Reset (LVDS)
• Double Data Rate Output Protocol
• LVDS Output Format
• Digital Interface (SPI) with Reset Signal
– Selectable 1:1 or 1:2 Demultiplexed Outputs
– Channel Mode Selection
– 500 mVpp or 625 mVpp Analog Input (Differential AC or DC
Coupled)
– Selectable Bandwidth (Four Available Settings)
– Gain Control (±18 )
– Offset Control (±50 mV)
– Phase Control (±14 ps Range)
– Standby Mode (Full or Partial)
– Binary or Gray Coding Selection
– Test Mode
• Power Supplies: 3.3V and 1.8V (Outputs), 1.8V (Digital)
• Power Dissipation: 4.2W Total (1:1 DMUX Mode)
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Size: 3200000 |
Author: 郭福珍 |
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Description: 本文介绍一种基于AT89S51单片机的智能型数字式多用表,该系统采用MC14433——3 1/2位A/D转换器和LED数码显示，可以测量直流电压、交流电压、直流电流和电阻，并且具有键盘选择测量对象、量程和自动量程转换功能。-This paper presents a AT89S51 MCU-based intelligent digital multimeter, the system uses the MC14433- 3 1/2 bit A/D converter and LED digital display, can measure DC voltage, AC voltage, DC current and resistance, and has a keyboard to choose measurement object, measurement range and automatic range conversion functions.
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Size: 504832 |
Author: 张师承 |
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Description: TMS320C2812 svpwm例程该程序用于简单的SVPWM演示，产生3相互差120度电角度的正弦交流电压-TMS320C2812 svpwm routine of the program for simple SVPWM presentation, resulting in 3 electrical angle of 120 degrees difference between the sinusoidal AC voltage
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Author: ywq |
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Description: 1、对于一个特定的Ｄ/Ａ转换接口电路，CPU执行一条输出指令将数据送入Ｄ/Ａ，即可在其输出端得到一定的电压输出。给Ｄ/Ａ转换器输入按正弦规律变化的数据， 在其输出端即可产生正弦波。对于音乐，每个音阶都有确定的频率。
各音阶标称频率值：
音 阶 1 2 3 4 5 6 7
频率(单位:Hz) 261.1 293.7 329.6 349.2 392.0 440.0 493.9
2、产生一个正弦波的数据可取32个（小于亦可），不同频率的区别，可通过调节向Ｄ／Ａ转换器输出数据的时间间隔，例如:发"１"频率为261.1HZ，周期为 1/261.1 = 3.83ms，输出数据的时间间隔为 3.83ms/32 = 0.12ms。定时时间可以由8253配合8255来实现。按下某键后发音时间的长短可以由发出的正弦波的个数多少来控制。
-文 » 英语<~ 复制
1, for A specific D/A transformation interface circuit, the CPU to execute A command to output data into D/A, in its output terminal can get certain voltage output. To D/A converter input according to the data, regular changes in the sine in its output terminal can produce sine wave. For music, each scales have certain frequency.
The scales nominal frequency value:
Note 1 2 3 4 5 order 6 7
Frequency (unit: 261.1 293.7 329.6 Hz ac) 349.2 392.0 440.0 493.9
2, produce A sine wave data desirable 32 (less than), also of different frequency difference, but through the adjustment to D/A converter output data intervals of time, such as: hair "1" frequency of 261.1 HZ ac, cycle for 1/261.1 = 3.83 ms, output data intervals of time of 3.83 ms/ms 32 = 0.12. Timing can be made by 8253 with 8255 time to realize. Press a key pronunciation by the length of time a sine wave can be the number to control how much.
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Size: 1024 |
Author: 李小凡 |
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