变电站远程视频监控系统的设计与实现

介绍了变电站远程视频监控系统的概念和应用价值,针对某电力公司的需求设计了远程视频监控系统的系统结构、通信协议、软件功能、软件模型及软件流程,采用VC++编程实现了变电站远程视频监控系统.     

机载SAR监控软件系统的设计与实现

在介绍了机载SAR系统组成的基础上,详细介绍了监控软件的主要功能,给出了监控软件的体系结构设计,并对监控软件的关键技术进行了详细描述,特别是监控软件的错误自恢复、波束指向角自修正、自动控制流程等技术,大大提高了系统的可靠性和稳定性。     

智能变电站辅助监控系统软件设计

本文结合智能变电站技术规范对辅助监控系统的要求,进行了智能变电站辅助监控系统一体化功能设计和监控软件设计,定义了系统的框架结构,重点对网省级主站软件、站级主站软件、信息交互机制、数据模型的设计进行了详细的阐述,本软件已在多个实际的变电站监控系统工程中得到成功应用。     

基于PROFINET的烟厂电力监控系统设计

为提高烟厂电力监控系统的自动化程度和可靠性,提出了基于PROFINET烟厂电力监控系统：把仪表、组态软件与PROFINET结合。该系统将硬件电路组装在开关柜中,通过组态软件开发设计监控软件,显示系统的配置及各种电气参数,实时控制现场各用电设备,实现配电网数据采集、监控和管理。整个系统集成度高,能满足烟厂电力监控系统分散化、网络化、智能化的要求。     

在用煤矿安全监控系统软件有效性检查方法

总结了在用煤矿安全监控系统软件基本功能检查的要点及方法,提出了通过数据一致性检查对煤矿安全监控系统软件进行有效性验证的方法,包括软件实时数据一致性检查、软件历史数据一致性检查、软件双机数据一致性检查、软件与联网系统一致性检查、矿方值班记录与监控主机一致性检查。     

NARI-NC2000计算机监控系统在水电厂的应用

介绍池潭水电厂计算机监控系统的发展和改造情况,包括计算机监控系统的改造原则、系统结构、硬件配置、软件组态的主要功能以及NC2000软件功能应用和软件的特点等.     

一种面向对象的电力系统监控软件模型

给出了一个面向对象的电力系统监控软件模型。在该模型中，系统的功能是由一些监控对象来实现。监控软件由监控系统和维护工具两部分组成。监控对象由维护工具创建，在监控系统中实施受控系统的监控。它们充当了三种角色：监控、维护以及用户界面。还给出了该模型的一个具体应用：NR－1001水电站监控软件。     

WZ系列微量注射泵监控系统及软件设计

介绍了建立WZ系列微量注射泵监控系统的目的、设想和可行性；然后介绍了系统的结构和监控软件的界面及功能设计；最后介绍了监控软件的设计分析和实现方法。     

基于STM32的航天器电气负载监控系统设计

针对传统电气负载监控系统通信纠错率较低,造成航天器电气负载监控准确率较差的问题,基于STM32设计一种新的航天器电气负载监控系统;分别设计电气负载监控系统的硬件和软件;系统硬件主要设计了嵌入式数据接口以及外接设备、驱动芯片以及监控继电器控制模块,WLAN驱动芯片能够有效降低成本和功耗,提高通信速率;通过电气负载监控执行实现软件功能,建立电力负载管理中心软件,提高监控系统的通信能力,提升负载监控的准确性;实验结果表明,基于STM32的航天器电气负载监控系统通信纠错率平均值为92%,航天器电气负载监控过程误差较小,具有一定的实际应用性。     

PLC和WinCC flexible在智能化自动售货机中的应用

通过对现行自动售货机监控系统的调查和研究,设计了以PLC为控制核心,以WinCC flexible为仿真软件的智能化自动售货机的监控系统,系统选用PLC来实现对系统的监控,并辅以组态软件WinCC flexible实现系统的上位PC机监控。该系统是一种采集精度、分辨率高、采集速度快、可靠性高、功能强大、维护方便的智能化自动售货机控制系统。     

WCDMA系统基带信号处理AFC算法研究

分析了WCDMA系统基带信号处理自动频率控制(AFC)的原理,重点对延时共扼相乘的AFC算法进行仿真,结果表明信噪比和衰落状况是AFC算法性能的重要影响因素.     

通信中间件技术在轨道交通AFC系统中的应用研究

城市轨道交通自动售检票AFC(Automatic Fare Collection)系统是一个集控制与信息管理于一体的综合管理系统.在终端设备、车站系统、中央计算机系统和城市轨道交通票务清分系统之间的城域网通信,直接影响AFC系统数据传输的稳定性和可靠性.在实践基础上,提出和总结了AFC系统数据通信传输的实现方式,并对通信中间件的开发与应用进行讨论.     

Transit smart card data mining for passenger origin information extraction

The automated fare collection(AFC) system,also known as the transit smart card(SC) system,has gained more and more popularity among transit agencies worldwide.Compared with the conventional manual fare collection system,an AFC system has its inherent advantages in low labor cost and high efficiency for fare collection and transaction data archival.Although it is possible to collect highly valuable data from transit SC transactions,substantial efforts and methodologies are needed for extracting such data because most AFC systems are not initially designed for data collection.This is true especially for the Beijing AFC system,where a passenger’s boarding stop(origin) on a flat-rate bus is not recorded on the check-in scan.To extract passengers’ origin data from recorded SC transaction information,a Markov chain based Bayesian decision tree algorithm is developed in this study.Using the time invariance property of the Markov chain,the algorithm is further optimized and simplified to have a linear computational complexity.This algorithm is verified with transit vehicles equipped with global positioning system(GPS) data loggers.Our verification results demonstrated that the proposed algorithm is effective in extracting transit passengers’ origin information from SC transactions with a relatively high accuracy.Such transit origin data are highly valuable for transit system planning and route optimization.     

IC卡安全的基础——IC卡用芯片的安全

IC卡是轨道交通自动售检票（AFC）系统中的车票介质,IC卡用芯片是一种集成电路芯片,除了IC卡的特殊应用环境要求IC卡用芯片具有较小的体积及环境适应性外,更重要的就是IC卡用芯片的安全性。文章阐述了IC卡用芯片的安全是IC卡安全性的基础,对在AFC系统中产生安全问题的几方面进行了分析,讨论了从芯片的设计阶段起就采用的必要的安全保护措施。     

自动售检票系统应用于客运专线方案探讨

结合客运专线铁路工程，从系统构成、主要功能、设备配置等方面对自动售检票系统有关技术方案进行了探讨和研究，并提出了客运专线铁路相关技术解决方案。可为客运专线自动售检票系统的设计提供一些参考。     

一类非线性欠驱动移动系统的加速度反馈增强的H∞扰支抑制控制

In this paper, a generalized acceleration feedback control (AFC) design method, named AFC enhanced H∞ controller, is proposed for both fnllactuated and underactuated nonlinear autonomous vehicle systems. The AFC is designed as a robust enhancement to the normal control based on known dynamics. First, in order to reject the uncertainties and external disturbances, a linear prefilter is used in the new AFC design method to replace the high gain in the normal AFC. Then, backstepping algorithm is applied to the AFC design of underactuated systems. The analysis of both the disturbance attenuation in frequency domain and input-output finite gain L2 stability shows the new controller design method is applicable. In the end, simulations are conducted with respect to the tracking control of unmanned model helicopter. The results are compared with those obtained by the tracking control without AFC to verify the feasibility of the new method.     

一类非线性欠驱动移动系统的加速度反馈增强的H∞扰动抑制控制

提出了一种即适用于全驱动系统, 也适用于欠驱动系统的加速度反馈控制新方法—加速度反馈增强的 H∞ 控制方法. 通过引入前置滤波器来代替传统加速度反馈控制方法中的高增益, 新的加速度反馈控制方法可以根据已知的非线性动力学项设计非线性鲁棒性增强控制器; 通过与后退算法相结合, 新的加速度反馈控制方法可以应用于欠驱动非线性系统; 通过在频率域及输入输出有限增益 L2 稳定的意义上的分析显示了新的方法具有良好的扰动抑制性能. 最后, 在一个直升机仿真模型上进行的跟踪控制仿真实验的结果验证了新方法的可行性与有效性.     

A Hybrid Intelligent Active Force Controller for Articulated Robot Arms Using Dynamic Structure Neural Network

The key feature of this paper is the application of a robotic control concept – Active Force Control (AFC). In this type of control, the unknown friction effect of the robotic arm may be compensated by the AFC method. AFC involves the direct measurement of the acceleration and force quantities and therefore, the process of estimating the system disturbance due to friction becomes instantaneous and purely algebraic. However, the AFC strategy is very practical provided a good estimation of the inertia matrix of articulated robot arm is acquired. A dynamic structure neural network – Growing Multi-experts Network (GMN) is developed to estimate the robot inertia matrix. The growing and pruning mechanism of GMN ensures the optimum size of the network that results in an excellent generalization capability of the network. Active Force Control (AFC) in conjunction with GMN successfully reduces the velocity and position tracking errors in spite of robot joint friction. The embedded GMN is capable of coupling the inertia matrix estimation on-line that clearly enhances the performance of AFC controller. The robustness and effectiveness of the new hybrid neural network-based AFC scheme are demonstrated clearly with regard to two link articulated robot and a simulated two-degree of freedom Puma 560 robot.     

A hybrid observer for characterization and compensation of periodic disturbances

Usage of frequency based error correction methods for repetitive disturbances becomes popular in data storage devices that use a rotating mechanical power plant. Two distinct disturbance cancellation methods, disturbance observer (DOB) and adaptive feed forward control (AFC) are the most popular approaches used for current drive servo integration. DOB reduces error using a predetermined function that is calculated thorough a complicated process. Generally the response to disturbance and initiation of control action of DOB is relatively fast even if the amount of error reduction is limited. Meanwhile the error elimination capability of AFC for the repetitive disturbance is normally better than DOB as it utilizes a Fourier coefficients updating feature that supports an enhanced fine adaptation of a certain frequency disturbance. Of course, AFC suffers for disturbances that have neighboring close frequencies due to the inherent fundamental frequency dependencies of AFC formulation. In the present work, an attempt for combining benefits of AFC and DOB is made. This might enables control action not only to generate fast response to disturbance but also perform an accurate error rejection. This feature also provides to the closed loop system a frequency selection for enabling a strategic selective error rejection. The proposed method named Hybrid Disturbance Observer (HDOB) is compared to the traditional AFC and DOB.     

自动售检票系统设备维修管理的技术研究

随着经济的繁盛,我国的城市化进程也加快了建设脚步,人口流动量急剧增加,使城市的公共交通面临的压力越来越大,因此诞生了城市轨道交通这种新的交通方式,使城市交通逐步迈向网络化和快速化,然而自动售检票系统也就随之产生了。本文对城市化的自动售检票系统做了详细的论述,同时对自动售检票系统的设备维修管理工作提出了一些具体的参考意见。