Exercise6_22

数据流图定义 DFD = Data Flow Diagram,数据流图 数据流图（Data Flow Diagram，DFD）是一种能全面地描述信息系统逻辑模型的主要工具，它可以用少...共20次编辑(Definition of data flow diagram DFD = Data Flow Diagram, data flow diagram data flow diagram (Data Flow Diagram, DFD) is an information system can fully describe a logical model of the main tools, which can be used 20 times less ... Edit)

用户分为普通用户和管理员 普通用户只有订餐、发送订单、修改个人信息的权利 管理员拥有普通用户的所有权利 以及增删改查的权利、对货物的增删改查 对订单的查看、删除、处理等、以及对用户的管理 (Users are divided into ordinary users and administrators ordinary users only ordering, send orders, the right to modify personal information Administrators have all the rights of the ordinary users as well as the right to CRUD the CRUD check goods orders view, delete, processing etc., as well as the management of the user' s)

异步电机转矩转速曲线，全速范围的，程序简单，便于修改(Asynchronous motor torque speed curves, full-speed range, the program is simple, easy to modify)

当前，矢量控制是一种优越的交流电机控制方式，它模拟直流电机的控制方式使得交流电机也能取得与直流电机相媲美的控制 效果。依据矢量控制的基本原理和方法，用 456752 8 9:4 7:<= 模块构建了一个基于转子磁场定向的旋转坐标系下的交流异步 电机矢量控制系统仿真模型，对其速度控制器提出并设计一种模糊滑模变结构控制算法。该控制算法具备模糊逻辑控制和滑模 变结构控制两者优点，并且较好地解决了滑动模态的抖动问题。仿真结果表明了该设计的可行性以及具有良好的动静态性能、 较强的鲁棒性(6.C+D& EFB@.A B.*@A.G ! H’ , )?+ ?1IFA).A B.*@A.G J.CF .K )*C1B@).* J.@.AL :@ B+* .>@+)* @(F ?+JF B.*@A.G FKKFB@ .K M’ J.@.A >D J.CFG)*/ @(F B.*@A.G J.CF .K M’ J.@.AL 5BB.AC)*/ @. EFB@.A B.*@A.G N ? IA)*B)IGF+*C JF@(.C& 456752 8 9:4 7:<= J.C1GF O+? 1?FC @. >1)GC+ ?)J1P G+@).* J.CFG .K 5’ J.@.A EFB@.A B.*@A.G ?D?@FJ >+?FC .* @(F A.@.A KG1Q .A)F*@FC B..AC)*+@F )* @()? I+IFAL R1SSD ?G)C)*/ E+A)+>GF ?@A1B@1AF B.*@A.G O+? IA.I.?FC+*C FJIG.DFC )* ?IFFC B.*@A.GGFAL 6(F B.*@A.GGFA I.??F??FC @(F JFA)@? .K K1SSD G./)B B.*@A.G+*C ?G)C)*/ J.CF E+A)+>GF ?@A1B@1AF B.*@A.G ， +*C )@ B+* ?.GEF @(F IA.>GFJ .K @(F B(+@@FA)*/ .K ?G)C)*/ J.CFL 6(F AF?1G@? .K ?)J1G+@).* )*C)B+@F @(+@ @(F B.*@A.GGFA O+? O.AT+>GF O)@( /..C A.>1?@*F??+*C /..C CD*+J)B+*C ?@+@)B IFAK.AJ+*BF F?IFB)+GGD )* @(F K)FGC .K F*/)*FFA)*/)

ELM算法参考论文，ELM算法参考论文，ELM算法参考论文，ELM算法参考论文(ELM algorithm reference papersELM algorithm reference papersELM algorithm reference papersELM algorithm reference papersELM algorithm reference papers)

boost变换器闭环控制设计方案及仿真模型(Boost converter closed-loop control design scheme and simulation model)

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. )

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.)

该文档讲述了一种交错并联型PFC电路的设计，设计大功率PFC电路时可以参考一下(This document describes the design of a interleaved parallel PFC circuit, and can be referenced when designing a high-power PFC circuit.)

hardware: 1.CPU:S3C2440A 2.norflash:2MB,bank0, 16bit 3.SDRAM: 64MB,bank6 4.Nandflash:256MB, 8bit 5.develop broad:TX2440A (V6.2 2011/05/12) 6.Jlink v8 software: 1.Jlink v4.08 2.MDK 4.23