Switched systems are embedded devices widespread in industrial applications such as power electronics and automotive control. They consist of continuous-time dynamical subsystems and a rule that controls the switching between them. Under a suitable control rule, the system can improve its steady-state performance and meet essential properties, such as safety and stability, in desirable operating zones.
标签： Invariance Switching Analysis1 Systems by
上传时间： 2020-06-07
上传用户：shancjb
This design uses Common-Emitter Amplifier (Class A) with 2N3904 Bipolar Junction Transistor. Use “Voltage Divider Biasing” to reduce the effects of varying β (= ic / ib) (by holding the Base voltage constant) Base Voltage (Vb) = Vcc * [R2 / (R1 + R2)] Use Coupling Capacitors to separate the AC signals from the DC biasing voltage (which only pass AC signals and block any DC component). Use Bypass Capacitor to maintain the Q-point stability. To determine the value of each component, first set Q-point close to the center position of the load line. (RL is the resistance of the speaker.)
上传时间： 2020-11-27
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This texts contemporary approach focuses on the concepts of linear control systems, rather than computational mechanics. Straightforward coverage includes an integrated treatment of both classical and modern control system methods. The text emphasizes design with discussions of problem formulation, design criteria, physical constraints, several design methods, and implementation of compensators.Discussions of topics not found in other texts--such as pole placement, model matching and robust tracking--add to the texts cutting-edge presentation. Students will appreciate the applications and discussions of practical aspects, including the leading problem in developing block diagrams, noise, disturbances, and plant perturbations. State feedback and state estimators are designed using state variable equations and transfer functions, offering a comparison of the two approaches. The incorporation of MATLAB throughout the text helps students to avoid time-consuming computation and concentrate on control system design and analysis
标签： 控制系统
上传时间： 2021-12-15
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为设计高效率、低损耗的PFC电路,本文基于UCC28019进行电路设计。以UCC28019输出的PWM波形来控制Boost升压斩波为核心电路,使电路中的电容交替地充放电、电感交替的储存和释放能量,最后实现在输入AC20V~24V电压情况下稳定输出DC38V。测试结果表明,系统实现效率为95%左右,电压调整率小于1%,电源功率因数0.99。交流输入电压为19.0-25.8 V时,输出直流电压稳定性较好,电感无明显啸叫且纹波小,具有一定的带负载能力和实用性。In order to design the PFC circuit with high efficiency and low loss,this paper designs the circuit based on UCC28019.The PWM waveform output by UCC28019 is used to control boost chopper as the core circuit,which alternately charges and discharges capacitors,stores and releases energy by inductors,and finally achieves stable output of DC38 V under the input voltage of AC20 V~24 V.The test results show that the system achieves about 95% efficiency,the voltage adjustment rate is less than 1%,the power factor is 0.99,and the AC input voltage is 19.0-25.8 V.The output DC voltage stability is good,the inductance has no obvious whistle and the ripple is small,so it has certain load capacity and practicability.
上传时间： 2022-04-03
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针对交流电路过零检测电路存在结构复杂、过零点检测不准确、编程繁琐等问题，设计了一种基于LM339的硬件结构简单的过零检测电路。通过仿真软件Mulisim对该设计电路进行了仿真，实验证明了该方案过零检测的可行性、稳定性和可靠性，可直接作为交流电路中CPU的过零信号。Aiming at the problems of AC cilsuit zero crossing detection circuit such as complex structure, zero crossing detection and cumbersome programming, a zero crossing detection circuit with simple hardware structure based on LM339 was designed. The design circuit was simulated by simulation software Mulisim, and the feasibility, stability and reliability of zero crossing detection were proved by experiments, which can be used as zero crossing signal of CPU in AC circuit directly.
上传时间： 2022-05-03
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RX-8801 SA Features built-in 32.768 kHz DTCXO, High Stability Supports l'C-Bus's high speed mode (400 kHz)Alarm interrupt function for day, date, hour, and minute settings Fixed-cycle timer interrupt function Time update interrupt function32.768 kHz output with OE function Auto correction of leap years Wide interface voltage range: 2.2 V to 5.5 V Wide time-keeping voltage range:1.8 V to 5.5 V Low current consumption: 0.84A/3V (Typ.)is an IC bus interface-compliant real-time clock which includes a 32.768 kHz DTCXO In addition to providing a calendar (year, month, date, day, hour, minute, second) function and a clock counter function, this module provides an abundance of other functions including an alarm function, fixed-cycle timer unction, time update interrupt function, and 32.768 kHz output function.The devices in this module are fabricated via a C-MOS process for low current consumption, which enables ong-term battery back-up.
上传时间： 2022-06-17
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VIP专区-嵌入式/单片机编程源码精选合集系列（104）资源包含以下内容：1. mips命令集详解.2. 数码相框原理图,ZXDP-010 (8302+720).3. CBM2090单片8BIT 16BIT共板原理图.4. 红外线遥控是目前使用最广泛的一种通信和遥控手段。由于红外线遥控装置具有体积小、功耗低、功能强、成本低等特点.5. 时间触发嵌入式系统设计模式 使用8051系列微控制器开发可靠应用.6. 关于555时基电路原理以及应用的介绍说明.7. 一个关于s3c2410_LCD_640*480的驱动程序.8. ipod——touch攻略.9. SDMMC 源码 SD、MMC卡的读写程序.10. 嵌入式试验开发平台简介.11. Mobile phone MMI design reference..12. 我写的stv2248 芯片的驱动程序.13. 应用于S60平台的示例程序.14. YAFFS (Yet Another Flash File System) is now in its second generation and provides a fast robust fil.15. 关于h264的演示 内容不错 希望大家喜欢..16. Michael Barr是Netrino公司的总裁兼创始人.17. 2006年软考的嵌入式系统设计师考试题及答案.18. S3C2440开发板原理图以及成品图片.是硬件开发工程师的好参考资料.19. 一个可以实现嵌入式视频监控系统的服务器软件。.20. 一个可以实现嵌入式视频监控系统的最新版客户端软件。.21. 东软嵌入式高级C培训(2007)).22. 最新的uffs,目前是1.1.2版本.23. NokiaSeries40Book1,介绍了40平台的手机开发.24. 数控编程开发事例,对数控机床的直线和圆户进行插补,.25. 用STR710控制串口及CC1100进行无线通信.26. 非常不错的单片机开发板原理图.27. s3c44b0bootloader分析.28. 以 DSpic30f4011为 SPI SLAVE的范例程式.29. 汉字与字符显示函数。对于任一主函数.30. 最详细最专业的MODBus协议介绍。 给MODBus总线开发的朋友们一些参考！.31. 本文较为详细的介绍了双CPU的C51系统设计中.32. c51的时钟芯片读写函数.33. 本书介绍了PCI局部总线的基本概念,功能,操作规则和使用方法.34. Intel公司的闪存转换层(Flash Translaion Layer)规范指导文件.35. h.261 player with running h.261,p24,h26 file.36. I2C接口协议.37. First of all we would like to thank God Almighty for giving us the strength and confidence in pursi.38. 2008年最新出版Silverlight及Blend学习电子书教程合集.39. 利用VB與VC程式整合開發實現影像物體分類辨識的PLC輸送帶系統.40. 凌阳公司机sunplus1002在这个芯片下.
标签： 光电子
上传时间： 2013-06-25
上传用户：eeworm
