fengzhi

基于51单片机的循迹避障小车。采用红外传感器实现循迹和避障 。功能比较简单(Tracking obstacle avoidance)

使用LPC932制作的一款电表,程序注释详细，学习参考好资料，不可商业。(LPC932 produced using a meter, program notes in detail, with reference to good learning materials, non-commercial.)

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：  基于单片机的指南针毕业设计，精度高，可行性较好(Compass graduation microcontroller-based design, high accuracy, feasibility)

：LTE(Long Term Evolution，长期演进)系统中的小区初始搜索过程通过分别检测主同步信号(Primary Synchronization Signal，PSS)和辅同步信号(Secondary Synchronization Signal，SSS)来完成，搜 索结果包括小区组ID、符号定时、频偏估计、组内小区ID以及帧定时[1]。然而，若接收信号   1IDN  2IDN 中存在整数倍频偏，则由于时域的相位旋转，主同步信号将很难用传统的相关算法检测到。提出一种主同步信号与整数倍频偏联合检测的方法，即使存在整数倍频偏，也能得到正确的符号定时。辅同步信号采用的是非相干的差分相关检测[2]，仿真表明，与传统的匹配滤波算法相比，可以有效的对抗信道时延扩展和载波频偏，适用于高速场景下时分双工(Time Division Duplex，TDD)LTE系统的同步。(In LTE systems, the initial cell search process is completed by detecting the primary synchroniza-tion signal and the secondary synchronization signal. The searching results include cell ID group, symbol timing, frequency offset estimation, intra group cell ID and frame timing[1]. However, if integer frequency offset presents in the received signal, due to time-domain phase rotation, the primary synchronization signal will be difficult to detected using the conventional correlation algorithm. A new joint detection method for integer frequency offset and primary synchronization signal is proposed, which can get the correct symbol timing even if the presence of integer frequency offset. Secondary synchronization signal is processed using the differential non-coherent correlation detection method[2]. Simulations show that compared with the tradi-tional matched filtering algorithms, it can effectively combat the channel delay spread and carrier frequency offset and especially suitable for )

用STM32生成2路互补的SPWM波，驱动逆变电源，具有变频功能(Generate 2-way complementary with STM32 SPWM wave inverter drive with conversion function)

saber软件搭建的BUCK双闭环控制模块，电流内环和电压外环，直接能用。(saber software built BUCK double-loop control module, the current inner and outer voltage, can be used directly.)

流水灯，跑马灯，定时器，交通灯，led，看门狗应用，数模转换等。(Water lights, traffic lights, marquees, timer, led, watchdog, DAC etc..)

基于STM32的CCD 图像传感器S10420驱动源码 实际测试有效，能过产生驱动(STM32-based CCD image sensor S10420 drive source code is actually tested, can produce a drive)

The Personal Software Process (PSP) shows engineers how to: 1)manage the quality of their projects 2)make commitments they can meet 3)improve estimating and planning 4)reduce defects in their products (The Personal Software Process (PSP) shows engineers how to : 1) manage the quality of their projects 2) make c ommitments they can meet 3) improve estimating and planning 4) reduce defects in their product s)