CRTSⅢ型板式无砟轨道静力学模型

说明：  求解二维波动方程，包括论文，公式依据和程序源代码(Solving two-dimensional wave equation, including papers, formulas and procedures based on source code)

说明：  very important part in vlsi fabrication. Lithography process

矢量控制与直接转矩控制是当前主要的两种电机变频调速控制方法，已在两相交流感应电机中得到 了应用。分析了两相不对称电机矢量控制和直接转矩控制原理以及两相三桥臂逆变器的SVPWM实现方法； 运用Matlab的Simulink建立了两相不对称交流感应电机矢量控制和直接转矩控制调速系统的仿真模型，并 对两种控制系统进行了仿真研究，给出了仿真波形，进行了特性比较． 关键词：两相电机；矢量控制；直接转矩控制；SVPWM；MATLAB；仿真(Vector Control and Direct Torque Control is currently the main method of frequency control of two motors, has been in two-phase AC induction motor has been applied. Analysis of asymmetric two-phase motor vector control and direct torque control principle and two-phase SVPWM inverter arm Bridge Implementation the use of Matlab in Simulink to establish a two-phase AC induction motor asymmetry of vector control and direct torque control modulation speed of system simulation models, and the two control system was simulated, the simulation waveform characteristics were compared. Key words: two-phase motor vector control direct torque control SVPWM MATLAB Simulation)

自主水下机器人运动控制系统设计，word文件，有图有公式，比较不错！(Autonomous underwater robot motion control system design, word documents, there are pictures and formulas, quite good!)

this is a document describe to do homework

这是高清720p-usb摄像头SN9c291的数据手册及原理图。(This is HD 720p-usb camera SN9c291 data manuals and schematics.)

三相桥式整流电路三相桥式全控整流电路图是应用最为广泛的整流电路，其电路图如下(let me in)

为了更好地进行谐波和无功功率的补偿与控制，叶FBD(Fryze一Buchholz一DPenbrock)法的定 义进行了完善，并给出了补偿电流检测的直接法和间接法，在三相电力系统中对FBD间接法进行 了推广研究，利用参考电压进行投影变换，不仅可以检测出功率电流和零功率电流，还可以检测出 基波有功电流、基波无功电流、谐波电流以及任意次谐波电流等，大大拓展了FBD法的应用范围和领域。MATI一AB仿真和实验结果表明了所定义和推广的电流检测方法的正确性和有效性。 (In order to improve the performance of active power filter(APF) harmonic current detection method, a harmonic current detection based on FBD(Fryze-Buchholz-Dpenbrock) algorithm was proposed. Reference voltage was generated by phase locked loop(PLL), and load current was projected to reference voltage, and then the active power fundamental current, reactive power fundamental current, harmonic current, fundamental negative sequence current, any harmonic current and so on can be detected accurately by using low-pass filter(LPF), and in the case of distorted voltage, the method was also applicable. The simulation results verify the fast dynamic speed, high detection accuracy, simple implement and good project value of the proposed algorithm. MATLAB simulation results confirm the feasibility and validity of the method.)

一篇论文,是关于磁轴承的控制的,用的是经典的PID控制算法.名为<磁力轴承系统PID控制特性的研究>(A paper on the control of magnetic bearings, using a classical PID control algorithm. Entitled )

先进PID控制及其MATLAB仿真。有大量实例及程序代码，对先进pid的控制学习及应用，很有帮助(Advanced PID Control and MATLAB simulation. A large number of examples and program code, pid control for advanced learning and applications, very helpful)