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Description: 矿用电机车电控系统有两种,一种是有触点的电控系统,另一种是脉冲调速系统。以晶闸管为主要元件的脉冲调速系统在矿用电机车中仍大量使用。晶闸管属于半控型器件,其控制极只能控制开通而不能控制其关断,在低速运行时,晶闸管一经导通后,如果不能根据需要关断,则电动机承受全部电压而失去控制,电机车全速运行。本文利用MATLAB软件对矿用电机车晶闸管脉冲调速系统的主电路进行建模并仿真,对影响安全运行的关键元器件进行了详细的分析。仿真结果表明晶闸管脉冲调速系统存在安全隐患。随着电子工业的飞速发展,一种新型的全控型电力器件(绝缘门极晶体管IGBT)开始在工业中得到广泛的应用,脉冲调速电控系统如采用全控型电力器件代替半控型元器件(晶闸管),将会大大简化控制电路。由于控制电路简单,便于实现数字化控制。本文对IGBT的调速原理进行分析,采用IGBT和集成PWM脉宽调制器SG3525为主要元件,设计出了双闭环可逆自动调速系统,并对该系统进行实验验证,实验结果表明该系统优于晶闸管直流调速系统,而且运行稳定,可以很方便实现可逆运行。-Mine electric locomotive electronic control system has two types of electronic control system with contacts, and the other is the pulse speed control system. The pulse thyristor as the main component in the mining electric locomotive speed control system is still widely used. A semi-controlled thyristor type devices, the control can only control a very open and can not control the turn-off, in the low speed, the thyristor turn-on once, if not turned off as needed, then the loss of the motor under full voltage control, motor vehicle running at full speed. In this paper, MATLAB software mining electric locomotive speed control system pulse thyristor main circuit modeling and simulation, the key components of the safe operation of a detailed analysis. Simulation results show that the thyristor pulse control system security weaknesses. With the rapid development of the electronics industry, a new full-controlled power devices (Insulated Gate Transistor IGBT) began to be widely used in indu
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Size: 4756480 |
Author: 王明 |
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Description: 产生急速上滑报警音响，要求变化率可控，由键盘输入控制值。按“Q”键退出。-Sound the alarm on the sliding produces rapid, controllable rate of change required by the keyboard input control values. Press " Q" key to exit.
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Size: 2048 |
Author: 邓敏中 |
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Description: The rapid adoption of automation techniques in dustry has increased the requirement for better
process control. This has resulted in many new applications for AC variable speed drives (VSDs) to
control the speed and torque of driven machinery. Variable speed drives (VSDs) are also used to meet
particular starting and stopping requirements. -The rapid adoption of automation techniques in industry has increased the requirement for better
process control. This has resulted in many new applications for AC variable speed drives (VSDs) to
control the speed and torque of driven machinery. Variable speed drives (VSDs) are also used to meet
particular starting and stopping requirements.
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Size: 5322752 |
Author: ssignn |
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Description: The remarkable advance in hydraulic and electrohydraulic power systems resulted in producing control valves of very short settling time. The rapid closure of hydraulic transmission lines leads to severe pressure surge. Thattached Simulink file is developed to evaluate the applicability of oleo-pneumatic accumulators for the protection against this phenomenon. A lumped parameter model was developed for the transmission line, assuming four lumps, considering the effect of line resistance, inertia and capacitance.
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Size: 916480 |
Author: koma |
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Description: JavaCenter Home社区SNS系统软件（简称：JavaCenter Home） 是北京飞速创想科技有限公司推出的一套采用Java+MySQL 构建的社会化网络软件（Social Network Software，简称 SNS）。用户可以在不需要任何编程的基础上，通过简单的设置和安装，在互联网上搭建起具备完善功能、很强负载能力和可高度定制的社会化网络平台。JavaCenter Home 的基础架构采用世界上最先进流行的 web 编程组合 Java+MySQL 实现，是一个经过完善设计，适用于各种服务器环境的高效系统解决方案。系统用MVC设计模式，采用Struts、Hibernate框架及中间件的结合既实现了业务逻辑与控制逻辑的有效分离，提高了层次结构的清晰度，提高了复用的粒度降低了开发代价和维护代价，同时保证了软件的质量使其更具有鲁棒性和可维护性-JavaCenter Home Community SNS system software (referred to as: JavaCenter Home), Beijing Science and Technology Co., Ltd. introduced the rapid innovation to a set of built using Java+ MySQL social networking software (Social Network Software, referred to as the SNS). Users can not require any programming, based on a simple setup and installation, erected on the Internet have improved function, strong load capacity, and highly customizable social networking platform. JavaCenter Home infrastructure using the most advanced combination of the popular Java+ MySQL web programming to achieve, perfection is a design for a variety of server environments and efficient system solutions. Systems MVC design pattern, using Struts, Hibernate framework and middleware implementation of the business combination of both logic and control logic of the effective separation, improved the clarity of the hierarchy to improve the granularity of reuse reduces development costs and maintenance costs , while ensu
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Size: 18784256 |
Author: stephen |
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Description: 随着城市化建设的快速发展，高层建筑不断增多。作为主要垂直运输工具的电梯得到了越来越广泛的应用，电梯群控技术也越来越受到重视。为了提高多台电梯行效率和服务质量，采用优质的电梯群控系统，统一管理多台电梯运行是一个值得研究的问题。电梯群控系统所要解决的是一个复杂的、具有非线性和不确定性的多目标随机决策问题。现代建筑多采用电梯群控技术来调度电梯群的运行，在提高系统服务质量和运营效率的同时降低能耗。-With the rapid development of urbanization, high-rise building on the increase. Vertical lift as the main means of transport has been more widely used, the elevator group control technology is also more and more attention. Multiple lines to improve efficiency and quality of service elevators, the use of high quality elevator group control system, the unified management of more than one elevator is a problem worthy of study. Elevator group control system to be solved is a complex, nonlinear and uncertain multi-objective decision making random. To use more modern building techniques to elevator group control the operation of elevator group scheduling in improving service quality and operational efficiency of the system while reducing energy consumption.
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Size: 2372608 |
Author: tony |
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Description: 控制端采用IOCP模型，数据传输采用zlib压缩方式
稳定快速，上线数量无上限，可同时控制上万台主机
控制端自动检测CPU使用率调整自己的工作线程, 稳定高效
-Control of end uses IOCP model, data transmission using zlib compression steady and rapid, no upper limit on the number line, which can control the control side host tens of thousands of CPU utilization to adjust their automatic detection of worker threads, stable and efficient
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Size: 3573760 |
Author: luo |
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Description: 用于android游戏快速开发的平台，包括字体，ui，控件等。-Rapid development of the game for the android platform, including fonts, ui, control and so on.
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Size: 272384 |
Author: xiongya |
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Description: 飞行控制系统快速原型设计Rapid Prototyping-Rapid Prototyping of Flight Control System
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Size: 220160 |
Author: marry |
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Description: 1.全站采用同步数据自动生成技术，支持手动快速生成，批量生成，不需要您手动操作。
2.支持js调用和全HTML静态；网站采用TXT缓存机制；定时生成设置，分页生成控制，减小服务器压力。
3.前台模板完全分离成“完整HTML文件”，您可以直接运行模板文件看效果，自由定义CSS标签，直接修改HTML模板文件，哪怕你每一个不同栏目的页面都采用不同模板，那都是您的自由！
4.“酷站收藏、音乐收藏、站内下载”这3个功能栏目默认不添加到程序，后台实时添加/屏蔽，系统系具有文章、图片、作品案例三大模块的“轻量级系统”。
5.图片上传均支持在线剪裁。
6.支持HTML模板标签自定义，全部采用HTML5构架,使标签更加语义化，更加适宜于搜索引擎。
7.支持简单的会员模块，具有相应的留言评论、下载、上传、注册、密保权限和会员反馈、VIP资源共享系统。
-1. Full stop synchronous data automatic generation technology to support the rapid generation of manual, batch production, does not require you to manual operation.
2. Js call and full support for HTML static site caching mechanism using TXT time generating set, generating paging control, reduce server stress.
3. Reception complete separation of the template into the "full HTML file", you can run the template file to see results, the Liberal definition of CSS tags, directly modify the HTML template file, even if you have a different part of each page are different template, that is your Freedom!
4. "Cool collection, music collection, download station," which features three columns do not add to the program by default, the background real-time add/shielding, the system line with articles, pictures, works of three major modules case "lightweight system" .
5. Image upload support the line cut.
6. Supports custom HTML template tags, all with HTML5 frame so that the la
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Size: 2657280 |
Author: Jimmy |
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Description: LabVIEW_快速构建步进电机控制系统的利器-LabVIEW_ rapid construction of stepping motor control system etc
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Size: 313344 |
Author: 吕泽思 |
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Description: 电子文档的概要设计和详细设计，系统流程图以及数据库表。-With the rapid development of computer technology, computers in business management applications to the popularization of computer use of electronic document management is imperative, office automation is information-based enterprises in the construction phase of the typical basic needs, is designed to standardize Enterprises and institutions of the day-to-day work processes and staff of day-to-day conduct. Electronic document management is to manage a very important cause of the management. It knowledge management as the core, communication, coordination and control for the purpose, will be thinking of modern office management and computer, networking, communications and other information tools highly integrated. Its implementation will improve work efficiency, enhance communication and collaboration, to achieve efficient management of electronic documents. Enterprises in the information is stored in the form of documents, along with the growing number of electronic documents, the est
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Size: 90112 |
Author: wuhaizhou |
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Description: 车牌自动识别技术是自动控制领域和交通工程领域重要研究课题之一,具有极高的理论研究和实际应用价值。随着自动控制技术、计算机技术和通讯技术的快速发展,新的研究方法和技术不断出现,并已在实际工程应用中显示出巨大的威力和发展潜力。-Automatic license plate recognition technology is the field of automatic control and traffic engineering one of the important research topics, with a high theoretical and practical value. With the automatic control technology, computer technology and the rapid development of communications technology, new methods and technologies continue to emerge, and has practical application show great power and potential.
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Size: 3885056 |
Author: hutua |
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Description: ZigBee遥控器部分
本程序实现 1. 利用12信道可以实现控制开关灯功能；2. 可以实现定时睡眠模式，这里采用的是模式2；在应用程序启动后，首先快速开门，关门一次，以便测试是否电池是否
有电，然后系统即进入待机等待接收开门信号状态。睡眠1秒，自动唤醒；然后循环等待检测是否有开门信号，等待1~3秒，若没有开门信号，则系统再次进入睡眠模式，睡眠1秒，自动唤醒……以此反复。-ZigBee remote parts of the Program Implementation 1. Use of 12 channels can control the light switch function 2. Can regularly sleep mode, this uses the Mode 2 in the application starts, the first rapid opening, closing time, to test whether the the battery has power, then the system enters the standby state waiting to receive the signal to open the door. Sleep 1 second, automatic wake-up then loop waiting for the signal detection have opened the door, waiting for 1 to 3 seconds, if not open the door signal, the system re-entering sleep mode, sleep 1 second, automatic wake-up ... ... this repeatedly.
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Size: 4096 |
Author: 陆子奇 |
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Description: 力控组态软件的详细讲解。便于力控软件的快速入门。-Force control configuration software explained in detail. Control software to facilitate the rapid entry force.
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Size: 4265984 |
Author: 高盼 |
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Description: BL75R04SM 2K 位EEPROM 射频识别
射频接口完全符合ISO15693标准
该程序可进行数据数据的多读写等操作
BL75R04SM 是遵从 ISO/IEC15693 无线接口的2Kbit 电子标签芯片。可制作成电子
标签或非接触卡，主要适用于大中型物流、商品防盗防伪、工业控制、门禁系统、军
事跟踪、路桥收费、畜牧养殖、图书文档管理、特种设备和金融票据等领域。具备防
2
冲突功能，读写器能同时快速处理多个芯片。片内2K 位 E PROM，分成64block，
每 block 有4 字节的数据存储区，2 个位的块锁存区，管理存储区2 block ，全球唯一
的64 位标示码。 -BL75R04SM 2 K bit EEPROM radio frequency identification
Rf interface fully comply with ISO15693 standards
This program can be more data data and operation
BL75R04SM is follow ISO/IEC15693 wireless interface Kbit electronic tag 2 chip. Can be made into electronic
Tag or the contact card, mainly is suitable for the large and medium-sized logistics, commodity anti-theft security, industrial control, access control system, the army
Things tracking, road, bridge charges, animal husbandry and breeding, books document management, special equipment and financial instruments, etc. Have the
2
Conflict, literacy can at the same time the function DuoGe rapid processing chip. Within 2 K bit E of PROM, which divided into 64,
Every four bytes of data which storage area, two bits of the latch area, the area of storage management, the only global which 2
A mark of 64 yards.
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Size: 166912 |
Author: zakailynn |
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Description: 继上次源码开放后，本次把BL芯片信息公开下载，供大家与程序操作
BL75R04SM 是遵从 ISO/IEC15693 无线接口的2Kbit 电子标签芯片。可制作成电子
标签或非接触卡，主要适用于大中型物流、商品防盗防伪、工业控制、门禁系统、军
事跟踪、路桥收费、畜牧养殖、图书文档管理、特种设备和金融票据等领域。具备防
2
冲突功能，读写器能同时快速处理多个芯片。片内2K 位 E PROM，分成64block，
每 block 有4 字节的数据存储区，2 个位的块锁存区，管理存储区2 block ，全球唯一
的64 位标示码。 -BL75R04SM 2 K bit EEPROM radio frequency identification
Rf interface fully comply with ISO15693 standards
This program can be more data data and operation
BL75R04SM is follow ISO/IEC15693 wireless interface Kbit electronic tag 2 chip. Can be made into electronic
Tag or the contact card, mainly is suitable for the large and medium-sized logistics, commodity anti-theft security, industrial control, access control system, the army
Things tracking, road, bridge charges, animal husbandry and breeding, books document management, special equipment and financial instruments, etc. Have the
2
Conflict, literacy can at the same time the function DuoGe rapid processing chip. Within 2 K bit E of PROM, which divided into 64,
Every four bytes of data which storage area, two bits of the latch area, the area of storage management, the only global which 2
A mark of 64 yards.
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Size: 197632 |
Author: zakailynn |
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Description: The rapid development of microelectromechanical systems (MEMS) technologies in recent years has provided a high degree of spatial miniaturization and integration of electromechanical components, which enable integrated sensing and control in manufacturing. In this paper we presented an overview of the state of the art of micro machined microsensors for the measurement of mechanical signals in the manufacturing industry for automobiles, manufacturing, medical equipment, environment, robotics, food and other consumer products.
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Size: 558080 |
Author: ab |
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Description: ：电流滞环控制具有易于实现、快速的动态响应和无条
件稳定等优点，但该控制方法使逆变器的开关频率不固定，
造成逆变器输出滤波器设计困难，因此很少有文献提及此种
滤波器的设计方法。该文研究了一种基于电流滞环控制的半
桥双降压式逆变器输出滤波器的设计方法。该方法从短路特
性和稳压精度两方面阐述了如何最优选取滤波电感，从谐振
频率和无功补偿两方面阐述了如何最优选取滤波电容-Hysteresis current control method has the
characters of simple implementation, a rapid dynamic response
and unconditional stability. But this control method made the
switching frequency varying widely. So it was difficult to
design the output filter of the inverter. Almost no one has
expressed how to design this kind of output filter. In this paper
a design method of half bridge dual buck inverter’s output filter
based on hysteresis current control was presented. In this
method how to choose the inductor optimally based on short
circuit function and the voltage drop, how to choose the
capacitor optimally based on resonant frequency and the
compensation of reactive power, were presented.
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Size: 321536 |
Author: wzh |
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Description: 设计背景:近年来现场可编程门阵列( FPGA) 技术得到了迅速的发展和广泛的应用, 其资源容量、工作频率以及集成度都得到了极大的提高, 使得利用FPGA 实现某些专用数字集成电路得到了大家的关注, 而基于FPGA 实现的直接数字频率合成器即DDS（Direct Digital Synthesizer）则更具其优点, 有着灵活的接口和控制方式、较短的转换时间、较宽的带宽、以及相位连续变化和频率分辨率较高等优点, 其也为设计者在此基础之上实现电路集成提供了另一种方法,同D/ A 转换器和低通滤波器( LPF) 一起便可以组成任意波形信号的发生器。-Design background: in recent years field programmable gates array (FPGA) technology obtained A rapid development and extensive application of its resource capacity, working frequency and integration have been greatly improved, make use of FPGA realizing some special Digital integrated circuit got everyone s attention, and based on FPGA realizing Direct Digital frequency Synthesizer namely Direct Digital Synthesizer (DDS) is more the advantages, has the flexible interface and the control mode, A relatively short period of time, A wide conversion bandwidth, and phase change and continuous frequency resolution higher advantages, its also to designers based on integrated circuit to realize provides an alternative method, with the D/A converter and low pass filter (together) and can form LPF of arbitrary wave form of signal generator.
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Size: 75776 |
Author: 吴飞飞 |
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