内燃机车驾驶自动化

文内介绍了采用复合控制原理和根据机车所处客观条件自动切换系统结构的内燃机车程序控制方案,介绍了按此方案制成的(自动司机)总体线路及其性能.介绍了利用这台控制机进行内燃机车自动驾驶的全面试验结果.文中着重讨论了自动切换系统结构的逻辑装置的设计计算.给出了综合这类系统参数的计算公式.此外,对系统的控制质量进行了详细讨论.     

基于AT89C52的某数字电压表的设计

文章在介绍某数字电压表设计要求的基础上,详细讨论了系统设计方案的选取,并重点介绍了基于AT89C52和AD574的硬件和软件方案的设计,给出了采样周期自适应调整、量程自动切换、叠加信号的周期检测以及平均值与有效值的计算等一些关键算法的实现.     

水工建筑施工详图辅助设计系统的研制与实现

介绍了一个水利施工建筑施工详图计算机辅助设计系统，并就系统结构、功能及自动标注、钢筋表自动生成等关键技术进行了讨论。     

双链轮自动切换机构

论述双链轮输纸机构的功用以及实现自动切换的方案论证，着重介绍切换机构的组成和工作原理。     

谈Visual Basic中的键盘输入法

介绍Visual Basic中的键盘输入法,通过调用Windows API函数,智能自动切换文本输入框的输入法,而不必手动切换,从而大大提高文字录入速度和效率.本文通过一个实例,详细介绍了键盘输入的智能自动切换.     

虹吸原理在东风系列内燃机车油耗量检测系统中的应用

油耗量检测是东风系列内燃机车水阻试验中一项必要检测指标，介绍了用虹吸原理检测东风系列内燃机车油耗量的方法。根据现场环境用单片机实现了硬件和软件设计，并对系统的误差进行了分析和校正。根据现场使用证明该系统结构简单、操作简便、测量准确、性能稳定，满足生产要求。     

基于OPC DX规范的双机热备份技术研究

介绍了基于OPC DX规范的双机热备份控制系统的设计和实现.着重讨论了系统结构设计以及主从服务器通信机制,分析了主从服务器数据同步的实现方案.     

基于时间依赖切换信号的切换系统稳定性分析研究进展

稳定性分析是研究切换系统时的基本问题.本文基于时间依赖的切换信号,回顾了切换系统的稳定性分析问题的研究进展及最新成果.首先,系统地介绍了常见的时间依赖的切换信号.在此基础上,分别介绍了连续和离散切换系统的稳定性分析的成果,并讨论了各方法的优缺点.最后,对切换系统的发展进行了展望.     

汽车安全检测线微机控制系统的研制

本文介绍了我们所研制的汽车安全性能测线分级分布式微机控制系统的总控方案，系统结构及作业流程，并对系统关键技术的实现方法进行了讨论。     

基于PCI9054的高速数据处理卡的设计

详细介绍了一种基于PCI9054的高速数据处理卡的系统结构以及主要功能模块,并基于PCI9054桥片和EPM1270,介绍了该数据处理卡的硬件和软件的实现方案,讨论了数据处理卡的测试结果.     

Performance assessment of thermal power plant load control system based on covariance index

This paper proposes a novel method of performance assessment for load control system of thermal power unit. Load control system is the most important multivariable control system. It is necessary to monitor and evaluate the performance of it. The performance evaluation index system based on covariance is defined, and the performance evaluation rules are given. In MATLAB, the double input and double output object model of the load control system is established, and the dynamic characteristics of the load control system are analyzed under the BF and TF mode. The simulation data, which is based on the parameters retuning, is used as the “benchmark data”, and the simulation data of different controllers are collected as “monitoring data”. For most of the time, the thermal power plant is under the coordinated control mode, and the principle and strategy of the two coordinated control are analyzed, and the engineering realization scheme is given. Operation data in different time periods of two different thermal power plants was acquisition and preprocessing respectively. The principle of selecting “benchmark data” is the minimum of pressure parameter. Two data segments were selected as “benchmark data”, performance assessment and analysis was carried on the data from other time periods. The results show that the validity and reliability of the method based on the evaluation index. In short, the data of the simulation and the load control system of power plant are used to demonstrate the effectiveness of the method.     

AMIRAL: A Block-Segmental Multirecognizer Architecture for Automatic Speaker Recognition

Fredouille, Corinne, Bonastre, Jean-François, and Merlin, Teva, AMIRAL: A Block-Segmental Multirecognizer Architecture for Automatic Speaker Recognition, Digital Signal Processing10(2000), 172–197.In the wide domain of automatic speech recognition, extracting the relevant information carried by the speech signal is far from easy. Diversity, redundancy, and variability, the main characteristics of the speech signal, make this task particularly difficult. The work reported here presents a multirecognizer architecture designed to cope with this issue in the framework of Automatic Speaker Recognition. This architecture, based on various individual recognizers, exploits different classes of information conveyed by the speech signal. In this paper, two classes of information are investigated: information related to the frequency domain, and “dynamic” information. This multirecognizer architecture is coupled with a block-segmental approach applied on each classifier. The overall system allows us to emphasize the most informative temporal blocks and to discard the least informative ones or those corrupted by noise. The AMIRAL system developed by the LIA integrates both approaches and was tested during the NIST/NSA 1999 speaker recognition evaluations. The results of these experiments for the tasks of Speaker Verification (“One Speaker” and “Two Speakers”) and Speaker Tracking are provided and discussed.     

Distributed leader‐follower flocking control

This paper presents a fuzzy based leader‐follower flocking system. To maintain the distance between robots, we use a fuzzy logic controller to design a “force function” which is related to the relative distance between neighbours. The “force function” is used to control velocity of robots. To prove stability of the flocking system, we build a Hamilton function which is kinetic energy of the flocking system. Utilizing the LaSalle's invariance principle, we prove that the system is stable. Specially, we develop a flocking controller in local form. By using the local controller, the robots in the flocking system only need to know local information (relative distances and relative angles between neighbours). To evaluate performance of the flocking system, we simulate the flocking system tracking trajectories with different shapes. The local flocking algorithm is tested with three Pioneer robots. We use the SICK laser scanner to measure the relative distances and relative angles between neighbours. Copyright © 2009 John Wiley and Sons Asia Pte Ltd and Chinese Automatic Control Society     

矿用防爆无轨胶轮车数据采集装置设计

针对传统防爆无轨胶轮车数据采集有限、采集方式集中的问题,设计了一种矿用防爆无轨胶轮车数据采集装置。介绍了相关行业标准中自动保护数据要求,指出防爆无轨胶轮车应采集温度、液位、压力、频率4种类型数据;给出了采集数据所用传感器的选型思路和信号采集原理框图。应用结果表明,该装置能够动态增减变送器数量、性能稳定、应用可靠。     

便携式通用型司机控制器测试仪的研制

机车司机控制器是机车的核心控制设备,为了保证机车司机控制器的检修质量和检修速度,以及机车的平稳操纵和各种运行工况的实现,通过分析其工作原理,搭建硬件系统,在Windows CE操作系统下的控制平台上采用C#语言开发司机控制器测试仪,并对司机控制器测试仪进行模拟测试.测试结果表明,司机控制器测试仪测量精度能够达到设计要求,测试性能良好,使用便捷,可以投入实际应用.     

多媒体仿真编程中的资源优化问题研究

结合“高炮仿真训练仪^[1]”编程过程分析,介绍多媒体仿真编程中,对内存和硬盘资源进行优化操作的几种方法。     

基于变频器的电机车定位控制原理及应用

于熄焦行业中的电机车是运送焦碳的重要设备,如何实现工艺要求的定位精度是电机车自动控制系统中的关键技术。本文介绍了一种利用变频器实现电机车精确定位的方法,重点阐述了其定位控制原理、参数设置以及PLC定位控制程序的设计。     

DK-1制动机半实物仿真及原理过程显示系统

列车制动系统直接关系到列车行车的安全,并和列车能否顺利提速、列车运行是否平稳舒适等有关,是列车控制系统中非常重要的一个环节。作为操纵控制的DK-1型机车制动机是一个集电与空气于一体的机电系统,其原理和状态转换过程复杂。为给乘务人员的操纵培训提供一个既有真实操纵感觉又能直观理解其原理过程的装置,研制了列车制动系统的半实物仿真及原理过程显示装置。该文介绍了列车制动系统半实物仿真的总体结构,并根据DK-1型机车制动机原理与结构的特点。讨论了其工作原理过程与状态的几类显示方法,给出了原理过程与状态显示软件的实现方案。该方法同样也适用于其它具有电和机械结构系统的原理过程的动态显示。     

A matrix gradient algorithm for identification of parameterized time‐varying parameters

This paper considers the problem of estimating time‐varying parameters which can be parameterized by a series of arbitrary known basis functions. It is shown that this problem is equivalent to the observer design problem for a “matrix” dynamic system. A “matrix” gradient algorithm, which mimics the well‐known “vector” gradient algorithm, is proposed to estimate the unknown matrix. The contribution of this paper is to show that convergence of the proposed matrix algorithm is guaranteed by the persistent excitations of both the regressor and the basis functions. Copyright © 2009 John Wiley and Sons Asia Pte Ltd and Chinese Automatic Control Society