rotor-critical-speed

随着可持续发展理念的深入，风力发电作为可再生能源得到了快速的发 展。风力发电系统的仿真在风力发电系统分析，发电量分析和电网的能量的 分析中都起到了非常重要的作用。 本文应用 MATLAB 软件，对风速、风轮、传动机构、发电机、与风力发 电相关的电力电子系统建立了数学模型，并进行仿真进方面的研究，得到了 可供分析的仿真结果。介绍了风力发电机组的控制技术，主要是变桨距控制 和发电机变速控制，并利用 MATLAB 软件对变桨距控制系统和低于额定风速 和高于额定风速时的变速风力发电系统进行了仿真。对双馈发电机的解耦控 制进行了仿真。并列举了典型的风力发电系统仿真实例。 (With the wild spread of concept of continuable development ， wind power generation, as a renewable resource, is getting fast development. The simulation of wind power system play a important role in yield of analysis of wind power generation system, the quantity of wind power generation , power generation system. This paper establish wind model, the wind turbine rotor model, drive trains model, induction machine model ， the electric power electron parts of wind power generation model, Then using soft of MATLAB, we realize the simulation. It introduces the control technology of wind turbine, mainly including variable blade pitch and variable speed control of wind turbine. Using Matlab simulate these. And lists an example of practical applying.)

说明：  Windows系统搭建esp8266的本地Mqtt服务器，局域网点亮一盏LED灯(Windows system builds the local Mqtt server of esp8266, and the local area network lights up an LED lamp.)

AT89C51制作的电子琴，有16键，还有自动播放音乐演奏功能(AT89C51 making organ, 16 keys, music player function also automatically)

说明：  MPU6050＋舵机，可实现平台的稳定。适用于STM32RCT6(MPU6050 + rudder can realize the stability of the platform. Applicable to STM32RCT6)

SD卡引脚定义以及SD卡的卡座定义(SD card pin definitions, and SD Card cards definition!)

飞思卡尔16位单片机MC9S12DG128的例程，很全的(Freescale 16-bit microcontroller MC9S12DG128 routine。)

说明：  基于ARM处理器的EtherCAT 通信开发平台(EtherCAT Communication Development Platform Based on ARM Processor)

C#写的ADSL拨号程序示例,ADSL自动拨号类,前提是在系统中已经有了一个宽带拨号连接(C# to write the ADSL dial-up procedures for example, ADSL automatic dial-up category, the premise that the system has made a broadband dial-up connection)

一个基于C语言的51单片机多功能电子闹钟日历，支持多组闹铃和倒计时功能，自动修正闰年天数(A microcontroller-based C-51 multi-function electronic calendar alarm clock, alarm and countdown to support multiple functions, automatically correct number of days in leap year)

GC0111 是格科微电子（上海）有限公司2010 年最新研发的一款SOC 芯片， 将Sensor 和协处理器整合到了一颗芯片中，能实现的功能包括：支持EMI 接口 的sensor 预览/拍照/录像、SPI 接口的sensor 预览/拍照/录像、USB1.1 / USB2.0 full speed、 JPEG 压缩以及提供软T 卡、软Touch panel 的全套解决方案。GC0111 使得MTK 6223D/Infineon ULC3 等低端平台加一颗sensor 变成多媒体手机，降 低客户成本。 GC0110 是格科微电子（上海）有限公司最新推出的支持SPI 协议的CMOS 图像传感器芯片，采用GalaxyCore 最新的传感器工艺，并优化了电路结构，支 持JPEG 压缩，缩短拍照速度，提高用户体验，并支持录像功能。 (GC0111 is Geke Microelectronics (Shanghai) Co., Ltd. 2010, the latest development of a SOC chip Sensor and co-processor will be integrated into a single chip, to achieve the features include: support for EMI Interface The sensor Preview/photo/video, SPI interface sensor Preview/photo/video, USB1.1/USB2.0 full speed, JPEG compression and to provide soft-T card, soft Touch panel the full set of solutions. GC0111 Makes low-end platform MTK 6223D/Infineon ULC3 add a sensor into a multimedia mobile phone, drop Low customer cost. GC0110 is Geke Microelectronics (Shanghai) Co., Ltd. support the latest CMOS SPI protocol Image sensor chip, using the latest sensor technology GalaxyCore and optimize the circuit structure, support Support JPEG compression, reducing the speed camera to improve the user experience and supports video recording. )