Diary

modélisation de la génératrice asynchrone a double alimentation

DS-CDMA-UWB and MB-OFDM-UWB system anylis

随着并联机构学理论的日益成熟，并联摇摆台以其大刚度、高精度和重载等优点，广泛应用于机械、航海和航天等领域。其中，以车辆模拟台的应用最为广泛。车辆在行驶过程中由于受到路况等扰动因素的影响，会产生横摇、纵倾、转艏、前冲、横移和升降共6种位姿的运动，而通过六自由摇摆台能将车辆的这些运动真实的再现出来。 本文以项目——六自由度重型摇摆台的研制为依托，在对国内外六自由度摇摆台的研究现状做了比较深入、系统分析的基础上，对车辆重型摇摆台与负载锁定结构进行了分析优化，主要的研究内容如下： 首先，对六自由度重型摇摆台进行运动学建模，分析、优化机构在六种独立姿态及部分耦合位姿情况下支撑杆的运动范围，最终确定了支撑杆合理的转角空间和上下铰链座的结构，提高了机构的运动学、动力学性能。 (With the development of theory of parallel mechanism, parallel plat quickly enters the international market for high stiffness、high precision and heavy load, which is widely used in mechanical、navigation and aviation, etc. Among these parallel plats, the vehicle simulator is the most widely used. Due to the disturbance factors of ups and downs of the different roads, vehicle has 6 degrees of freedom during its traveling movements, such as rolling、pitching、yawing、surging、swaying and heaving that can be simulated in the use of 6-DOF platform. Based on the project of heavy platform, this paper optimizes the platform and the load locking structure after the in-depth and systematic analysis of 6-DOF parallel plat at home and abroad, the main research contents are as follows: Firstly, this paper establish the kinematic modeling that is used to analyze the rotating range of the axis belonging to the supporting pole in many traveling conditions, such as one of six movements indepe)

同步电机模型的MATLAB仿真,本文针对同步电机中具有代表性的凸极机，再使用MATLAB中用于仿真模拟系统的SIMULINK对系统的各个部分进行封装及连接，系统总体分为电源、abc/dq转换器、电机内部模拟、控制反馈四个主要部分，并为其设计了专用的模块，同时对其中的一系列参数进行了配置。(Synchronous motor model of the MATLAB simulation, this paper, synchronous motor has a salient-pole machine representation, and then use the MATLAB simulation system used for the system SIMULINK package and connect the various parts of the system in general is divided into power, abc/dq converters, motor internal simulation, feedback control of four main parts, and to design a dedicated module, while a series of parameters in which the configuration.)

大规模光伏发电并网对互联电力系统阻尼特性的影响及其阻尼控制策略(Influence of Large-Scale PhotoVoItaic System Integration on Danlping Characteristics of Interconnect Grid and Dampjng Control)

上海热线ii试验网接入部分方案(上海贝尔有限公司) 毕业设计内参(Shanghai Hotline ii pilot network access part of the program (Shanghai Bell Co. Ltd.) Graduation INCOMPATIBLE)

为了给变频调速系统提供必要的设计参数，依据空间电压矢量脉宽调制（SVPWM）基本原理，介绍了 异步电动机及 SVPWM 算法在 Matlab/Simulink 环境下的建模过程及基于矢量控制理论的变频调速系统动态 模型建立。详细地阐述了实现仿真的方法，并针对仿真中的关键问题及系统的仿真结果进行了分析。仿真结 果表明，采用该控制系统，电压及转矩波动小，转速响应迅速，系统的各项指标都满足电机实际运行特性要 求。其仿真算法对于实现数字化控制变频调速系统具有一定的价值。 (To provide the necessary design parameters for the actual motor control system, the modeling course of voltage space vector pulse wide modulation（SVPWM）agrithmetic and AC motor under Matlab/Simulink environment are introduced. The dynamic model of variable frequency speed regulating system based on vector control is discussed according to the principle of SVPWM. The new method of realizing simulation, key problems and results of the simulation are analyzed in detail. The experimental simulation results show that this system has smaller fluctuations of voltage and torque, quicker response speed, and all of the indicators accord with the performance of the actual motor. The simulation agrithmetic have value to realize controlling motor with digital signal processing. )

说明：  射频功放数字预失真技术研究及其FPGA实现，文中介绍了数字预失真的实现架构，介绍了QRD_RLS算法实现的相关CORDIC技术，GIVENS旋转，以及systolic阵等原理(RF power amplifier digital pre-distortion technology and its FPGA implementation, this paper describes the realization of digital pre-distortion framework introduced QRD_RLS relevant CORDIC algorithm implementation techniques, GIVENS rotation, and other systolic array principles)

关于s变换的和反变换代码，也是做毕业论文时搜到的，希望大家没能用到(A basis for efficient representation of the S-transform invert S-transform ,also have some examples)

本次论文首先对物联网技术做了一个详细的介绍，阐述了本次论文的研究背景和意义，从而介绍了物联网技术在国内外的一些发展现状，以及到目前为止国内外关于物联网技术所创造的成果。(This paper first on the Internet of things technology made a detailed introduction, elaborated the paper research background and significance)