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在綜合分析諧波勵(lì)磁無刷同步發(fā)電機(jī)勵(lì)磁控制系統(tǒng)的基礎(chǔ)上,對(duì)其勵(lì)磁控制策略進(jìn)行了研究,開發(fā)了一套基于DSP( TMS320F2812) 控制的新型柴油發(fā)電機(jī)勵(lì)磁控制系統(tǒng),該系統(tǒng)采用參數(shù)自適應(yīng)模糊PID 控制勵(lì)磁,選用交流采樣方式實(shí)時(shí)檢測(cè)各信號(hào)的瞬時(shí)特性,系統(tǒng)仿真結(jié)果以及在1 臺(tái)25 kW 工頻柴油發(fā)電機(jī)上的試驗(yàn)結(jié)果證明了該控制器具有較好的電壓調(diào)節(jié)特性,系統(tǒng)穩(wěn)態(tài)和暫態(tài)性能完全滿足發(fā)電機(jī)對(duì)勵(lì)磁系統(tǒng)的要求。關(guān)鍵詞:勵(lì)磁調(diào)節(jié);模糊PID 控制;數(shù)字信號(hào)處理器;交流采樣
Abstract :According to the general analysis of the excitation cont rol system of the harmonious wave excitation brushless synchronous generator and it s characteristics ,a new type of diesel generator excitation cont rol system based on DSP( TMS320F2812) was designed. An adaptive fuzzy PID cont rol of excitation is used in this system. To detect the t ransient characteristics of the signals in a timely manner ,AC sampling was applied.The system simulation result s and the testing result s f rom a 25 kW diesel generator (50 Hz) can prove that the voltage regulation characteristics of the excitation cont rol system are very well ,and both the steadyOstate performance and the t ransient performance of the generator are also good.Key words :excitation cont rol ;fuzzy PID cont rol ;digital signal processor (DSP) ;AC sampling
標(biāo)簽：
DSP
柴油發(fā)電機(jī)
勵(lì)磁控制
系統(tǒng)研究
上傳時(shí)間：
2013-10-29
上傳用戶：fxf126@126.com
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設(shè)計(jì)一種應(yīng)用于某全地形ATV車載武器裝置中的中控系統(tǒng)，該系統(tǒng)設(shè)計(jì)是以TMS320F2812型DSP為核心，采用模塊化設(shè)計(jì)思想，對(duì)其硬件部分進(jìn)行系統(tǒng)設(shè)計(jì)，能夠完成對(duì)武器裝置高低、回轉(zhuǎn)方向的運(yùn)動(dòng)控制，實(shí)現(xiàn)靜止或行進(jìn)狀態(tài)中對(duì)目標(biāo)物的測(cè)距，自動(dòng)瞄準(zhǔn)以及按既定發(fā)射模式發(fā)射彈丸和各項(xiàng)安全性能檢測(cè)等功能。通過編制相應(yīng)的軟件，對(duì)其進(jìn)行系統(tǒng)調(diào)試，驗(yàn)證了該設(shè)計(jì)運(yùn)行穩(wěn)定。
Abstract:
A central control system applied to an ATV vehicle weapons is designed. The system design is based on TMS320F2812 DSP as the core， uses modular design for its hardware parts. The central control system can complete the motion control of the level of weapons and equipment， rotation direction， to achieve a state of static or moving objects on the target ranging， auto-targeting and according to the established target and the projectile and the launch of the security performance testing and other functions. Through the development of appropriate software and to carry out system testing to verify the stability of this design and operation.
標(biāo)簽：
ATV-ATT
DSP
中控系統(tǒng)
上傳時(shí)間：
2013-11-02
上傳用戶：jshailingzzh
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This white paper discusses how market trends, the need for increased productivity, and new legislation have
accelerated the use of safety systems in industrial machinery. This TÜV-qualified FPGA design methodology is
changing the paradigms of safety designs and will greatly reduce development effort, system complexity, and time to
market. This allows FPGA users to design their own customized safety controllers and provides a significant
competitive advantage over traditional microcontroller or ASIC-based designs.
Introduction
The basic motivation of deploying functional safety systems is to ensure safe operation as well as safe behavior in
cases of failure. Examples of functional safety systems include train brakes, proximity sensors for hazardous areas
around machines such as fast-moving robots, and distributed control systems in process automation equipment such
as those used in petrochemical plants.
The International Electrotechnical Commission’s standard, IEC 61508: “Functional safety of
electrical/electronic/programmable electronic safety-related systems,” is understood as the standard for designing
safety systems for electrical, electronic, and programmable electronic (E/E/PE) equipment. This standard was
developed in the mid-1980s and has been revised several times to cover the technical advances in various industries.
In addition, derivative standards have been developed for specific markets and applications that prescribe the
particular requirements on functional safety systems in these industry applications. Example applications include
process automation (IEC 61511), machine automation (IEC 62061), transportation (railway EN 50128), medical (IEC
62304), automotive (ISO 26262), power generation, distribution, and transportation.
圖Figure 1. Local Safety System
標(biāo)簽：
FPGA
安全系統(tǒng)
上傳時(shí)間：
2013-11-05
上傳用戶：維子哥哥
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The field of microelectromechanical systems (MEMS), particularly micromachinedmechanical transducers, has been expanding over recent years, and the productioncosts of these devices continue to fall. Using materials, fabrication processes, anddesign tools originally developed for the microelectronic circuits industry, newtypes of microengineered device are evolving all the time—many offering numerousadvantages over their traditional counterparts. The electrical properties of siliconhave been well understood for many years, but it is the mechanical properties thathave been exploited in many examples of MEMS. This book may seem slightlyunusual in that it has four editors. However, since we all work together in this fieldwithin the School of Electronics and Computer Science at the University of Southampton,it seemed natural to work together on a project like this. MEMS are nowappearing as part of the syllabus for both undergraduate and postgraduate coursesat many universities, and we hope that this book will complement the teaching thatis taking place in this area.
標(biāo)簽：
MEMS
教材
上傳時(shí)間：
2013-10-16
上傳用戶：朗朗乾坤
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機(jī)電類比法是一種把機(jī)械量通過一定的計(jì)算等效類比為電量的方法，其在對(duì)電子機(jī)械系統(tǒng)的分析中應(yīng)用非常廣泛。它能夠把一個(gè)較復(fù)雜的機(jī)械系統(tǒng)類比為我們熟知的電路系統(tǒng)來進(jìn)行分析，從而使問題的分析得到簡(jiǎn)化。本文通過對(duì)振弦式傳感器的分析介紹了機(jī)電類比法，并對(duì)使用電路進(jìn)行了相關(guān)的分析。 Summary：The electromechanical analogy is assort of analysis which is to analogize the mechanical system by using circuit system , it applied widely in the filed of analysis the electronic-mechanical system. The analysis can take a complex mechanical system analogous to a circuitry that we well-known, which can simplify the problems. In the paper, the electro-mechanical analogy method is briefly introduced by analysis the vibrating wire sensor，and have a correlation analysis about the circuit we used.關(guān)鍵詞： 機(jī)電類比法 振弦式傳感器 頻率 振蕩 反饋Keyword：electro-mechanical analogy method，vibrating wire sensor，frequency, oscillation, feedback
0 引言振弦式傳感器是屬于頻率式傳感器的一種。所謂頻率式傳感器就是能直接將被測(cè)量轉(zhuǎn)換為振動(dòng)頻率信號(hào)的傳感器，這類傳感器一般是通過測(cè)量振弦、振筒、振梁、振膜等彈性振體或石英晶體諧振器的固有諧振頻率來達(dá)到測(cè)量引起諧振頻率變化的被測(cè)非電量的目的，其也稱為諧振式傳感器[1]。在分析該類傳感器中，由于其涉及到頻率，就容易讓人聯(lián)想到在電子技術(shù)中接觸到的RLC振蕩電路。因此可以嘗試著用類比的方法使之對(duì)應(yīng)起來分析,即機(jī)電類比法分析。
標(biāo)簽：
機(jī)電
傳感器
分
類比法
上傳時(shí)間：
2013-11-16
上傳用戶：paladin
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The LPC2292/2294 microcontrollers are based on a 16/32-bit ARM7TDMI-S CPU with real-time emulation and embedded trace support, together with 256 kB of embedded high-speed flash memory. A 128-bit wide memory interface and a unique accelerator architecture enable 32-bit code execution at the maximum clock rate. For critical code size applications, the alternative 16-bit Thumb mode reduces code by more than 30 pct with minimal performance penalty.
With their 144-pin package, low power consumption, various 32-bit timers, 8-channel 10-bit ADC, 2/4 (LPC2294) advanced CAN channels, PWM channels and up to nine external interrupt pins these microcontrollers are particularly suitable for automotive and industrial control applications as well as medical systems and fault-tolerant maintenance buses. The number of available fast GPIOs ranges from 76 (with external memory) through 112 (single-chip). With a wide range of additional serial communications interfaces, they are also suited for communication gateways and protocol converters as well as many other general-purpose applications.
Remark: Throughout the data sheet, the term LPC2292/2294 will apply to devices with and without the /00 or /01 suffix. The suffixes /00 and /01 will be used to differentiate from other devices only when necessary.
標(biāo)簽：
lpc
datasheet
2292
2294
上傳時(shí)間：
2014-12-30
上傳用戶：aysyzxzm
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The main objective of this book is to present all the relevant informationrequired for RF and micro-wave power amplifier design includingwell-known and novel theoretical approaches and practical design techniquesas well as to suggest optimum design approaches effectively combininganalytical calculations and computer-aided design. This bookcan also be very useful for lecturing to promote the analytical way ofthinking with practical verification by making a bridge between theoryand practice of RF and microwave engineering. As it often happens, anew result is the well-forgotten old one. Therefore, the demonstrationof not only new results based on new technologies or circuit schematicsis given, but some sufficiently old ideas or approaches are also introduced,that could be very useful in modern practice or could contributeto appearance of new ideas or schematic techniques.
標(biāo)簽：
Amplifier
Microwave
Design
Power
上傳時(shí)間：
2013-12-22
上傳用戶：vodssv
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Radio frequency (RF) can be a complex subject to navigate, but it does not have to be. If you are just getting started with radios or maybe you cannot find that old reference book about antenna aperture, this guide can help. It is intended to provide a basic understanding of RF technology, as well act as a quick reference for those who “know their stuff” but may be looking to brush up on that one niche term that they never quite understood. This document is also a useful reference for Maxim’s products and data sheets, an index to deeper analysis found in our application notes, and a general reference for all things RF.
標(biāo)簽：
射頻
基礎(chǔ)知識(shí)
上傳時(shí)間：
2013-10-23
上傳用戶：685
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Radio frequency (RF) can be a complex subject to navigate, but it does not have to be. If you are just getting started with radios or maybe you cannot find that old reference book about antenna aperture, this guide can help. It is intended to provide a basic understanding of RF technology, as well act as a quick reference for those who “know their stuff” but may be looking to brush up on that one niche term that they never quite understood. This document is also a useful reference for Maxim’s products and data sheets, an index to deeper analysis found in our application notes, and a general reference for all things RF.
標(biāo)簽：
無線技術(shù)
上傳時(shí)間：
2013-10-08
上傳用戶：kinochen
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Single-Ended and Differential S-Parameters
Differential circuits have been important incommunication systems for many years. In the past,differential communication circuits operated at lowfrequencies, where they could be designed andanalyzed using lumped-element models andtechniques. With the frequency of operationincreasing beyond 1GHz, and above 1Gbps fordigital communications, this lumped-elementapproach is no longer valid, because the physicalsize of the circuit approaches the size of awavelength.Distributed models and analysis techniques are nowused instead of lumped-element techniques.Scattering parameters, or S-parameters, have beendeveloped for this purpose [1]. These S-parametersare defined for single-ended networks. S-parameterscan be used to describe differential networks, but astrict definition was not developed until Bockelmanand others addressed this issue [2]. Bockelman’swork also included a study on how to adapt single-ended S-parameters for use with differential circuits[2]. This adaptation, called “mixed-mode S-parameters,” addresses differential and common-mode operation, as well as the conversion betweenthe two modes of operation.This application note will explain the use of single-ended and mixed-mode S-parameters, and the basicconcepts of microwave measurement calibration.
標(biāo)簽：
差分電路
單端
模式
上傳時(shí)間：
2014-03-25
上傳用戶：yyyyyyyyyy
