gearbox-testproblem

在电网电压频率波动或者三相不平衡的情况下,硬件锁相很难准确检测到基波正序的相位。在结合PWM整流器空间矢量解耦控制算法的基础上,将软件锁相环技术应用在PWM整流器控制系统中,并用仿真和实验验证了该方案的可行性。实验结果表明,该方案解决了电网电压频率波动及三相不平衡时的相位同步等问题,并在工程上具有一定参考价值。(Frequency or voltage fluctuations in three-phase unbalanced case, the hardware lock is difficult to accurately detect the fundamental positive sequence phase. In the space vector PWM rectifier with decoupling control algorithm based on the software used in the PWM rectifier PLL control system, and use simulation and experimental verification of the feasibility. Experimental results show that the solutions to address the voltage and frequency fluctuations of the phase unbalanced three-phase synchronization issues, and the project has a certain reference value.)

针对DVB-T标准ETSI EN 300 744 V1.5.1,设计了可用于DVB-T接收整机的多速率DDC模块,并在FPGA中仿真实现.在复用数字振荡混频模块的基础上,根据输入信号的不同带宽(6M/8MHz)选择不同的抽取滤波器组完成抽取因子为3或4的多速率处理任务,利用两级半带滤波器(HBF)级联完成4倍抽取滤波,单级奈奎斯特滤波器完成3倍抽取滤波. (For the DVB-T standard ETSI EN 300 744 V1.5.1, designed for DVB-T receiver machine multi-rate DDC module, and the simulation in the FPGA implementation. Numerical oscillation in the complex mixer module, based on the input signals of different bandwidths (6M/8MHz) choose a different group of complete decimation filter extracted factor 3 or 4 of the multi-rate processing tasks, using two half-band filter (HBF) cascade to complete four times decimation filter, single-stage Chennai Nyquist filter to complete three times the decimation filtering.)

开发板原理图 自己可以设计开发板为什么一定要买呢(Development board schematic can design their own development board why they must buy it)

RS 编码 优秀论文，有流程框图和C源码(RS coding excellent papers have flow diagram and C source code)

该视频监控系统是数字化、网络化的监控系统，该系统采用MPEG一4高效率图像编解码技术和嵌入式设计。可提供高清晰监控图像、软件视音频切换、录放像、远程控制、远程信一号采集、WEB服务、全程集中控制等功能(The video surveillance system is digital, networked surveillance system that uses highly efficient MPEG-4 image encoding and decoding technology and embedded design. Can provide high-resolution monitor images, video and audio software switch, playback like a remote control, remote channel One collection, WEB services, centralized control and other functions throughout the)

各类滤波器设计资料及相关软件的介绍说明等等(Information on various types of filter design and presentation software instructions, etc.)

说明：  永磁同步电机双闭环控制MATLAB仿真程序(MATLAB permanent magnet synchronous motor double closed-loop control)

ASP_NETAJAX在Web开发中的应用

说明：  基于USB的数字接口测试系统的设计，硕士学位论文(USB digital interface based on test system design, Master thesis)

实用开关电源设计 实验电源 交流电源 直流电源(Practical switching power supply design experimental power AC power DC power supply)